Carbon Trends最新文献

Eco and user–friendly curcumin based nanocomposite forensic powder from coal fly ash for latent fingerprint detection in crime scenes 基于姜黄素的粉煤灰纳米复合法医粉末用于犯罪现场潜伏指纹检测，既环保又方便使用

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2024-11-13 DOI: 10.1016/j.cartre.2024.100427

E. PRABAKARAN, K. PILLAY

In this study, the production of an eco-friendly curcumin based nanocomposite fingerprint labeling powder is reported for the first time. This powder was prepared from thermal power plant waste known as coal fly ash. 3-aminopropyltrimethoxysilane (APTMS) was covalently interacted with coal fly ash (CFA/APTMS) and curcumin (CUR) was encapsulated onto CFA/APTMS to give a novel and eco-friendly CFA/APTMS/CUR nanocomposite for LFPs detection with the powder dusting method. Several instrumental techniques including Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), UV–visible spectroscopy, fluorescence spectroscopy (FL), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), and transmission electron microscopy (TEM) were used to characterize this nanocomposite. The CFA/APTMS/CUR nanocomposite was applied as a forensic powder for the development of latent fingerprint (LFPs) images on various porous and non-porous substrates. Level 2 (island, origination, bifurcation, termination, fork, dot, and bridge) and Level 3 (sweat pores and shape of triangles, round, and irregular) were the features of the LFP images. Under visible light conditions, the aging LFPs images were clearly detected on an aluminum foil surface using the nanocomposite powder, which had good sensitivity and minimal background interference. Additionally, LFPs images were developed using CFA/APTMS/CUR nanocomposite on leather substrates for belts and shoes in order to confirm the benefits of the nanocomposite's high sensitivity. This nanocomposite improved LFPs images with unique patterns and showed excellent performance on a variety of surfaces for the development of LFPs. These findings therefore proved that the powdered CFA/APTMS/CUR nanocomposite can be effectively utilized for the development of LFPs images at important crime scenes and for the biometric identification of criminal suspects through fingerprint comparison.

本研究首次报道了一种生态友好型姜黄素纳米复合指纹标签粉末的生产过程。这种粉末由火力发电厂废弃物粉煤灰制备而成。3-aminopropyltrimethoxysilane (APTMS) 与粉煤灰（CFA/APTMS）发生共价作用，姜黄素（CUR）被包裹在 CFA/APTMS 上，从而制备出一种新型环保的 CFA/APTMS/CUR 纳米复合材料，用于粉末喷粉法检测 LFPs。该纳米复合材料的表征采用了多种仪器技术，包括傅立叶变换红外光谱（FT-IR）、X 射线衍射（XRD）、紫外可见光谱、荧光光谱（FL）、扫描电子显微镜（SEM）、能量色散 X 射线光谱（EDS）和透射电子显微镜（TEM）。CFA/APTMS/CUR 纳米复合材料被用作法医粉末，用于在各种多孔和无孔基底上生成潜伏指纹图像。LFP 图像的特征是二级（岛状、起源、分叉、终止、叉状、点状和桥状）和三级（汗孔和三角形、圆形和不规则形状）。在可见光条件下，使用纳米复合粉末可在铝箔表面清晰地检测到老化的 LFPs 图像，灵敏度高，背景干扰小。此外，还使用 CFA/APTMS/CUR 纳米复合材料在皮带和鞋子的皮革基底上绘制了 LFPs 图像，以证实纳米复合材料的高灵敏度优势。这种纳米复合材料以独特的图案改善了 LFP 图像，并在用于开发 LFP 的各种表面上显示出卓越的性能。因此，这些研究结果证明，粉末 CFA/APTMS/CUR 纳米复合材料可有效地用于重要犯罪现场的 LFPs 图像开发，以及通过指纹对比对犯罪嫌疑人进行生物识别。

{"title":"Eco and user–friendly curcumin based nanocomposite forensic powder from coal fly ash for latent fingerprint detection in crime scenes","authors":"E. PRABAKARAN, K. PILLAY","doi":"10.1016/j.cartre.2024.100427","DOIUrl":"10.1016/j.cartre.2024.100427","url":null,"abstract":"<div><div>In this study, the production of an eco-friendly curcumin based nanocomposite fingerprint labeling powder is reported for the first time. This powder was prepared from thermal power plant waste known as coal fly ash. 3-aminopropyltrimethoxysilane (APTMS) was covalently interacted with coal fly ash (CFA/APTMS) and curcumin (CUR) was encapsulated onto CFA/APTMS to give a novel and eco-friendly CFA/APTMS/CUR nanocomposite for LFPs detection with the powder dusting method. Several instrumental techniques including Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), UV–visible spectroscopy, fluorescence spectroscopy (FL), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), and transmission electron microscopy (TEM) were used to characterize this nanocomposite. The CFA/APTMS/CUR nanocomposite was applied as a forensic powder for the development of latent fingerprint (LFPs) images on various porous and non-porous substrates. Level 2 (island, origination, bifurcation, termination, fork, dot, and bridge) and Level 3 (sweat pores and shape of triangles, round, and irregular) were the features of the LFP images. Under visible light conditions, the aging LFPs images were clearly detected on an aluminum foil surface using the nanocomposite powder, which had good sensitivity and minimal background interference. Additionally, LFPs images were developed using CFA/APTMS/CUR nanocomposite on leather substrates for belts and shoes in order to confirm the benefits of the nanocomposite's high sensitivity. This nanocomposite improved LFPs images with unique patterns and showed excellent performance on a variety of surfaces for the development of LFPs. These findings therefore proved that the powdered CFA/APTMS/CUR nanocomposite can be effectively utilized for the development of LFPs images at important crime scenes and for the biometric identification of criminal suspects through fingerprint comparison.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100427"},"PeriodicalIF":3.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unveiling the nanostructured nature of pyrobitumen and shungite carbons through Raman, X-ray and theoretical analyses 通过拉曼、X 射线和理论分析揭示焦沥青和霰石碳的纳米结构性质

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2024-11-09 DOI: 10.1016/j.cartre.2024.100421

Eric Faulques , Nataliya Kalashnyk , Yves Lulzac , Yves Moëlo

X-ray powder diffraction and multi-wavelength Raman spectroscopy were employed to characterize carbonaceous geomaterials, offering the first nanostructural analysis of rare pyrobitumen (LP) samples from the Lopérec gold deposit in Brittany, France, by comparing them to Karelian shungite (KS) and carbon allotropes samples. The inter-reticular distances d₍₀₀₂₎ for LP/KS, derived from X-ray diffraction patterns, are 3.57(1)/3.48(1) Å, with crystal thickness Lc₍₀₀₂₎ and graphitization degree of 1.4/2.0 nm and 6.9/13.1, respectively. Raman band deconvolution indicates graphitic domain sizes of L_a = 6.7/8.2 nm and graphene-like flake tortuosity L_t = 9.2/11.3 nm. Extensive density functional theory calculations on various 2D nanoflakes accurately predict that the D and G Raman bands may originate from graphene quantum dots, which form part of the nanostructure of these geomaterials. LP exhibits greater structural disorder than KS, along with a lower density (1.60 vs. 1.85 g/cm³), suggesting a lower degree of graphitization, likely due to formation at a lower temperature (∼300 °C). The Lopérec pyrobitumen is believed to result from a redox process involving a CO₂-rich, oxidizing hydrothermal solution interacting with a local hydrocarbon source.

利用 X 射线粉末衍射和多波长拉曼光谱表征碳质地质材料，通过将法国布列塔尼洛佩雷茨金矿床的稀有焦沥青（LP）样品与卡累利阿闪长岩（KS）和碳同素样品进行比较，首次对其进行了纳米结构分析。根据 X 射线衍射图样得出，LP/KS 的垂直间距 d(002) 分别为 3.57(1)/3.48(1) Å，晶体厚度 Lc(002) 和石墨化程度分别为 1.4/2.0 nm 和 6.9/13.1。拉曼频带解旋显示石墨畴尺寸为 La = 6.7/8.2 nm，石墨烯类薄片曲折度 Lt = 9.2/11.3 nm。对各种二维纳米薄片进行的大量密度泛函理论计算准确地预测了 D 和 G 拉曼带可能来自石墨烯量子点，它们构成了这些土工材料纳米结构的一部分。与 KS 相比，LP 表现出更大的结构无序性，同时密度较低（1.60 vs. 1.85 g/cm³），这表明石墨化程度较低，可能是由于在较低的温度（∼300 °C）下形成的。据信，洛佩雷茨热沥青是富含二氧化碳的氧化热液与当地碳氢化合物源相互作用的氧化还原过程的结果。

{"title":"Unveiling the nanostructured nature of pyrobitumen and shungite carbons through Raman, X-ray and theoretical analyses","authors":"Eric Faulques , Nataliya Kalashnyk , Yves Lulzac , Yves Moëlo","doi":"10.1016/j.cartre.2024.100421","DOIUrl":"10.1016/j.cartre.2024.100421","url":null,"abstract":"<div><div>X-ray powder diffraction and multi-wavelength Raman spectroscopy were employed to characterize carbonaceous geomaterials, offering the first nanostructural analysis of rare pyrobitumen (LP) samples from the Lopérec gold deposit in Brittany, France, by comparing them to Karelian shungite (KS) and carbon allotropes samples. The inter-reticular distances <em>d</em><sub>(002)</sub> for LP/KS, derived from X-ray diffraction patterns, are 3.57(1)/3.48(1) Å, with crystal thickness <em>Lc</em><sub>(002)</sub> and graphitization degree of 1.4/2.0 nm and 6.9/13.1, respectively. Raman band deconvolution indicates graphitic domain sizes of <em>L</em><sub>a</sub> = 6.7/8.2 nm and graphene-like flake tortuosity <em>L<sub>t</sub></em> = 9.2/11.3 nm. Extensive density functional theory calculations on various 2D nanoflakes accurately predict that the D and G Raman bands may originate from graphene quantum dots, which form part of the nanostructure of these geomaterials. LP exhibits greater structural disorder than KS, along with a lower density (1.60 vs. 1.85 g/cm³), suggesting a lower degree of graphitization, likely due to formation at a lower temperature (∼300 °C). The Lopérec pyrobitumen is believed to result from a redox process involving a CO<sub>2</sub>-rich, oxidizing hydrothermal solution interacting with a local hydrocarbon source.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100421"},"PeriodicalIF":3.1,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reduced thermal conductivity of constricted graphene nanoribbons for thermoelectric applications 降低热电应用中受限石墨烯纳米带的热导率

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2024-11-09 DOI: 10.1016/j.cartre.2024.100423

Wenusara Satheekshana , Pasan Henadeera , Chamara Somarathna , Nalaka Samaraweera , Galhenage Asha Sewvandi

Graphene nanoribbons (GNRs) hold promise as thermoelectric (TE) materials due to their advantageous electronic properties compared to conventional candidates. However, a key challenge to enhancing the TE performance of GNRs lies in reducing the thermal conductivity while maintaining the electronic transport properties. To address this challenge - this study proposes a GNR-based structure featuring nanoscale constrictions named graphene nano constrictions (GNCs). This work systematically analyzes the thermal transport properties of these GNCs and compares them to conventional GNRs. Non-Equilibrium Molecular Dynamics (NEMD) simulations were employed to evaluate the lattice thermal conductivity of the material, and a marked reduction of thermal conductivity exceeding 74 % was observed in the proposed structures. Furthermore, it is revealed that the thermal conductivity of these structures can be further tailored by manipulating their physical geometry, focusing on the length and the constriction dimensions. Additionally, superlattice counterparts of the GNCs composed of graphene and h-BN are explored in this study. Subsequently, an 88 % reduction of lattice thermal conductivity is observed in the superlattice counterparts of GNCs compared to GNRs. Overall, this study demonstrates the effectiveness of nanoscale constrictions in manipulating the thermal conductivity of GNR-based structures, creating a path for optimizing their TE performance and potential device applications.

石墨烯纳米带（GNR）具有优于传统候选材料的电子特性，有望成为热电（TE）材料。然而，要提高 GNR 的热电性能，关键的挑战在于如何在保持电子传输特性的同时降低热导率。为了应对这一挑战，本研究提出了一种基于 GNR 的结构，该结构具有纳米级收缩，被命名为石墨烯纳米收缩（GNCs）。这项工作系统地分析了这些 GNC 的热传输特性，并将其与传统的 GNR 进行了比较。研究人员采用非平衡分子动力学（NEMD）模拟来评估材料的晶格热导率，结果发现拟议结构的热导率明显降低，降幅超过 74%。此外，研究还发现，这些结构的热导率可以通过操纵其物理几何形状（主要是长度和收缩尺寸）来进一步调整。此外，本研究还探讨了由石墨烯和 h-BN 组成的 GNC 的超晶格对应物。结果发现，与 GNRs 相比，GNCs 的超晶格对应物的晶格热导率降低了 88%。总之，本研究证明了纳米级约束在操纵基于 GNR 结构的热导率方面的有效性，为优化其 TE 性能和潜在的器件应用开辟了一条道路。

{"title":"Reduced thermal conductivity of constricted graphene nanoribbons for thermoelectric applications","authors":"Wenusara Satheekshana , Pasan Henadeera , Chamara Somarathna , Nalaka Samaraweera , Galhenage Asha Sewvandi","doi":"10.1016/j.cartre.2024.100423","DOIUrl":"10.1016/j.cartre.2024.100423","url":null,"abstract":"<div><div>Graphene nanoribbons (GNRs) hold promise as thermoelectric (TE) materials due to their advantageous electronic properties compared to conventional candidates. However, a key challenge to enhancing the TE performance of GNRs lies in reducing the thermal conductivity while maintaining the electronic transport properties. To address this challenge - this study proposes a GNR-based structure featuring nanoscale constrictions named graphene nano constrictions (GNCs). This work systematically analyzes the thermal transport properties of these GNCs and compares them to conventional GNRs. Non-Equilibrium Molecular Dynamics (NEMD) simulations were employed to evaluate the lattice thermal conductivity of the material, and a marked reduction of thermal conductivity exceeding 74 % was observed in the proposed structures. Furthermore, it is revealed that the thermal conductivity of these structures can be further tailored by manipulating their physical geometry, focusing on the length and the constriction dimensions. Additionally, superlattice counterparts of the GNCs composed of graphene and h-BN are explored in this study. Subsequently, an 88 % reduction of lattice thermal conductivity is observed in the superlattice counterparts of GNCs compared to GNRs. Overall, this study demonstrates the effectiveness of nanoscale constrictions in manipulating the thermal conductivity of GNR-based structures, creating a path for optimizing their TE performance and potential device applications.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100423"},"PeriodicalIF":3.1,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tuning the soft bandgap in the density of the states: The measurement of a "magnetogap" effect in carbon-black samples 在态密度中调节软带隙：测量碳黑样品中的 "磁隙 "效应

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2024-11-07 DOI: 10.1016/j.cartre.2024.100422

A. Aparecido-Ferreira , E.S. Alves , G.M. Ribeiro , J.F. Sampaio

We investigated the magnetic field dependence on the variable range hopping electron conduction in carbon-black samples with different volumetric densities. By applying the concepts and equations of hopping regimes when the magnetic field is applied, we were able to establish a connection between the variation of the hopping temperatures, T_ES and T_M, with the localization radius of electron conduction in carbon-black, as well as with the density of states of this material. The volumetric density dependence of all these physical quantities is also discussed. Finally, based on the magnetic field effects on the hopping parameters, we introduced the idea of a "Magnetogap" effect, indicating how the Coulomb gap changes with the magnetic field.

我们研究了磁场对不同体积密度的碳黑样品中可变范围跳变电子传导的依赖性。通过应用磁场作用时的跳频概念和方程，我们能够建立起跳频温度 TES 和 TM 的变化与碳黑中电子传导的局部半径以及这种材料的状态密度之间的联系。此外，还讨论了所有这些物理量与体积密度的关系。最后，基于磁场对跳跃参数的影响，我们引入了 "磁隙 "效应的概念，说明库仑隙如何随磁场变化。

引用次数: 0

Exploration of graphitic carbon from crude oil vacuum residue 从原油真空残渣中提取石墨碳

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2024-11-05 DOI: 10.1016/j.cartre.2024.100424

Ravi Dalsania , Hasmukh Gajera , Mahesh Savant

Preparation of graphitic carbon from low value refinery waste has captivated immense interest in past years owing to its low cost and abundant nature. Successful utilization of petroleum vacuum residue is a major challenge in the petroleum industry. In this study pyrolysis of vacuum residue fractions has been carried out for the preparation of graphitic carbon like material. The vacuum residue fractions were obtained from three different crude oils originated from Middle East, Canada and South America. The purity of the Aromatic, Resin and Asphaltene (ARA) fractions were confirmed using TLC-FID which denoted complete separation. The chemical composition were determined using elemental analysis and it revealed ARA fractions to be carbon rich regardless of its origin. Further, sulphur content was found to be high in ARA fractions from Heavy Crude oil (HCO). The degree of polymerization and molecular weight measured using GPC specify that asphaltene has high accumulation with high molecular weight compared with aromatic and resins. ARA derived carbon and heat-treated materials were analysed by TGA, XRD and Raman spectroscopy to study microstructural changes in formation of graphite like material. Thermogravimetric analysis of all ARA samples revealed the different decomposition stages for pyrolyzed, calcined and graphitized samples. The results of XRD demonstrated that the distance between the planes (d-spacing) is above 3.35 Å for all high temperature treated ARA derived carbon materials irrespective of its origin, indicating formation of graphite like structure. In Raman analysis, the nature and intensity of G and D bands evolution during each step of pyrolysis is supporting XRD results for formation of highly ordered graphitic carbon material. Furthermore, understanding feed quality has direct influence on high efficiency, low costs and sustainability, the major issues for oil refinery business.

过去几年，从低价值炼油废料中制备石墨碳因其成本低、资源丰富而备受关注。成功利用石油真空残渣是石油工业面临的一大挑战。本研究对真空残渣馏分进行了热解，以制备类似石墨碳的材料。真空残渣馏分来自中东、加拿大和南美洲的三种不同原油。芳烃、树脂和沥青质（ARA）馏分的纯度使用 TLC-FID 进行确认，结果表明完全分离。通过元素分析确定了化学成分，结果表明 ARA 馏分富含碳元素，无论其来源如何。此外，还发现来自重质原油（HCO）的 ARA 馏分中硫含量较高。使用 GPC 测量的聚合度和分子量表明，与芳香烃和树脂相比，沥青烯具有较高的累积量和较高的分子量。通过热重分析、X 射线衍射和拉曼光谱对 ARA 衍生碳和热处理材料进行了分析，以研究形成类似石墨材料的微观结构变化。对所有 ARA 样品进行的热重分析表明，热解、煅烧和石墨化样品处于不同的分解阶段。X 射线衍射结果表明，所有经过高温处理的 ARA 衍生碳材料，无论其来源如何，平面间距（d-spacing）都超过了 3.35 Å，表明形成了类似石墨的结构。在拉曼分析中，每一步热解过程中 G 和 D 波段演变的性质和强度都证明了 XRD 的结果，即形成了高度有序的石墨碳材料。此外，了解原料质量对高效率、低成本和可持续发展有直接影响，而这正是炼油厂业务面临的主要问题。

{"title":"Exploration of graphitic carbon from crude oil vacuum residue","authors":"Ravi Dalsania , Hasmukh Gajera , Mahesh Savant","doi":"10.1016/j.cartre.2024.100424","DOIUrl":"10.1016/j.cartre.2024.100424","url":null,"abstract":"<div><div>Preparation of graphitic carbon from low value refinery waste has captivated immense interest in past years owing to its low cost and abundant nature. Successful utilization of petroleum vacuum residue is a major challenge in the petroleum industry. In this study pyrolysis of vacuum residue fractions has been carried out for the preparation of graphitic carbon like material. The vacuum residue fractions were obtained from three different crude oils originated from Middle East, Canada and South America. The purity of the Aromatic, Resin and Asphaltene (ARA) fractions were confirmed using TLC-FID which denoted complete separation. The chemical composition were determined using elemental analysis and it revealed ARA fractions to be carbon rich regardless of its origin. Further, sulphur content was found to be high in ARA fractions from Heavy Crude oil (HCO). The degree of polymerization and molecular weight measured using GPC specify that asphaltene has high accumulation with high molecular weight compared with aromatic and resins. ARA derived carbon and heat-treated materials were analysed by TGA, XRD and Raman spectroscopy to study microstructural changes in formation of graphite like material. Thermogravimetric analysis of all ARA samples revealed the different decomposition stages for pyrolyzed, calcined and graphitized samples. The results of XRD demonstrated that the distance between the planes (d-spacing) is above 3.35 Å for all high temperature treated ARA derived carbon materials irrespective of its origin, indicating formation of graphite like structure. In Raman analysis, the nature and intensity of G and D bands evolution during each step of pyrolysis is supporting XRD results for formation of highly ordered graphitic carbon material. Furthermore, understanding feed quality has direct influence on high efficiency, low costs and sustainability, the major issues for oil refinery business.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100424"},"PeriodicalIF":3.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The trifunctional electrocatalytic activity of hierarchically structured porous carbon derived from environmentally malignant Prosopis juliflora 从环境恶劣的茜草中提取的分层结构多孔碳的三功能电催化活性

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2024-10-31 DOI: 10.1016/j.cartre.2024.100419

Sathyanarayanan Shanmugapriya , Mariappan Ganeshbabu , Subramani Surendran , Yun Sung Lee , Ramakrishnan Kalai Selvan

Finding an efficient and affordable multifunctional electrocatalyst with long-term durability has received paramount interest in the recent scenario. The present work attempted to facilitate ecologically threatful invasive biomass – P. juliflora- derived porous carbon as an effectual Pt support for trifunctional electrocatalytic applications. The preparation of Pt decorated P. juliflora -derived porous carbon (Pt/J-600, Pt/J-700, and Pt/J-800) involves simple hydrothermal carbonization, pyrolysis at various temperatures of 600, 700 & 800⁰C and polyol mediated reduction. The obtained XRD results reveal the turbostratic nature of the prepared porous carbon favoring to anchor the Pt NPs. Significantly, the estimated I_D/I_G ratios of Raman profile substantiates the highly defective structure of Pt/J-800. The TEM images disclose the agglomeration-free dispersion of Pt NPs in the Pt/J-800 electrocatalyst. The EIS analysis demonstrates the relatively low solution and charge transfer resistances (R_s = 0.646 Ω & R_ct = 0.312 Ω). The desirable 4e- transfer with an improved limiting current density of -4.44 mA cm^-2 signpost better oxygen reduction reaction (ORR) performance of Pt/J-800 than the other prepared electrocatalysts. Additionally, the high electrochemical surface area (652.72 m² g^-1) and good mass activity (49.09 mA mg_pt^-1) prove the excellent methanol oxidation reaction (MOR) activity. Moreover, a minimal overpotential of 31 mV @ 10 mA/cm², and a lower Tafel slope of 32 mV/dec with 24 hr stable performance proved the efficient hydrogen evolution reaction (HER) performance of Pt/J-800. The remarkable electrochemical performance of Pt/J-800 is attributed to the enhanced surface area created by hierarchically porous carbon support and the uniform dispersion of Pt nanoparticles with optimum loading.

近年来，寻找一种高效且价格合理、具有长期耐久性的多功能电催化剂受到了广泛关注。本研究试图将具有生态威胁的入侵生物质--鹅掌楸--衍生多孔碳作为一种有效的铂载体，用于三功能电催化应用。Pt/J-600 、Pt/J-700 和 Pt/J-800）的制备包括简单的水热碳化、600、700 & 800⁰C不同温度下的热解和多元醇介导的还原。获得的 XRD 结果表明，制备的多孔碳具有有利于锚定铂 NPs 的涡流性质。值得注意的是，拉曼图谱中估计的 ID/IG 比率证实了 Pt/J-800 的高度缺陷结构。TEM 图像显示，铂 NPs 在 Pt/J-800 电催化剂中无团聚分散。EIS 分析表明，该催化剂具有相对较低的溶液电阻和电荷转移电阻（Rs = 0.646 Ω & Rct = 0.312 Ω）。与其他制备的电催化剂相比，Pt/J-800 的氧还原反应（ORR）性能更好，4e-转移效果理想，极限电流密度提高到 -4.44 mA cm-2。此外，高电化学表面积（652.72 m2 g-1）和良好的质量活性（49.09 mA mgpt-1）也证明了其出色的甲醇氧化反应（MOR）活性。此外，Pt/J-800 的过电位（31 mV @ 10 mA/cm2）极小，Tafel 斜率（32 mV/dec）较低，且 24 小时性能稳定，证明了其高效的氢进化反应（HER）性能。Pt/J-800 的卓越电化学性能归功于分层多孔碳支撑所产生的更大表面积，以及最佳负载的铂纳米粒子的均匀分散。

{"title":"The trifunctional electrocatalytic activity of hierarchically structured porous carbon derived from environmentally malignant Prosopis juliflora","authors":"Sathyanarayanan Shanmugapriya , Mariappan Ganeshbabu , Subramani Surendran , Yun Sung Lee , Ramakrishnan Kalai Selvan","doi":"10.1016/j.cartre.2024.100419","DOIUrl":"10.1016/j.cartre.2024.100419","url":null,"abstract":"<div><div>Finding an efficient and affordable multifunctional electrocatalyst with long-term durability has received paramount interest in the recent scenario. The present work attempted to facilitate ecologically threatful invasive biomass – <em>P. juliflora</em>- derived porous carbon as an effectual Pt support for trifunctional electrocatalytic applications. The preparation of Pt decorated <em>P. juliflora</em> -derived porous carbon (Pt/J-600, Pt/J-700, and Pt/J-800) involves simple hydrothermal carbonization, pyrolysis at various temperatures of 600, 700 & 800⁰C and polyol mediated reduction. The obtained XRD results reveal the turbostratic nature of the prepared porous carbon favoring to anchor the Pt NPs. Significantly, the estimated I<sub>D</sub>/I<sub>G</sub> ratios of Raman profile substantiates the highly defective structure of Pt/J-800. The TEM images disclose the agglomeration-free dispersion of Pt NPs in the Pt/J-800 electrocatalyst. The EIS analysis demonstrates the relatively low solution and charge transfer resistances (R<sub>s</sub> = 0.646 Ω & R<sub>ct</sub> = 0.312 Ω). The desirable 4e- transfer with an improved limiting current density of -4.44 mA cm<sup>-2</sup> signpost better oxygen reduction reaction (ORR) performance of Pt/J-800 than the other prepared electrocatalysts. Additionally, the high electrochemical surface area (652.72 m<sup>2</sup> g<sup>-1</sup>) and good mass activity (49.09 mA mg<sub>pt</sub><sup>-1</sup>) prove the excellent methanol oxidation reaction (MOR) activity. Moreover, a minimal overpotential of 31 mV @ 10 mA/cm<sup>2</sup>, and a lower Tafel slope of 32 mV/dec with 24 hr stable performance proved the efficient hydrogen evolution reaction (HER) performance of Pt/J-800. The remarkable electrochemical performance of Pt/J-800 is attributed to the enhanced surface area created by hierarchically porous carbon support and the uniform dispersion of Pt nanoparticles with optimum loading.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100419"},"PeriodicalIF":3.1,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Natural Kapok fiber-derived two-dimensional carbonized sheets as sustainable electrode material 作为可持续电极材料的天然木棉纤维二维碳化片

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2024-10-28 DOI: 10.1016/j.cartre.2024.100418

Vinay Gangaraju , Navya Rani M , Kunal Roy , Tathagata Sardar , Manikanta P Narayanaswamy , Murthy Muniyappa , Prasanna D Shivaramu , Dinesh Rangappa

Natural biomass-derived carbon nanostructures have attracted research interest because of their unique surface and electrochemical properties. The present study embodied the carbonized micro-nano sheets derived from the low-cost natural source Kapok silk fiber. The material was obtained via a facile thermal pyrolysis process. Diffraction analysis showed a broad graphene structure-like peak, indicating the formation of graphene-like carbon nanosheets. Field emission scanning electron microscope (FESEM) and transmission electron microscopic (TEM) images confirmed the presence of fragmented carbon sheets, some of which were folded to form a tube-like structure. Raman study showed the presence of D and G band with the Id/Ig ratio of 0.96 which indicated the formation of few-layered carbon nanosheets. Furthermore, the electrochemical performance was evaluated for lithium-ion battery as well as supercapacitor. A specific capacity of 465 mAh.g^-1 at 0.1 C rate for Li-ion battery and a specific capacitance of 473.61 F.g^-1 for supercapacitor have been obtained with the capacitance retention of 95 %. This study provides insights into a strategy for the sustainable production and utilization of natural fiber-based carbon in energy storage systems.

源自天然生物质的碳纳米结构因其独特的表面和电化学特性而备受研究关注。本研究体现了从低成本天然来源木棉蚕丝纤维中提取的碳化微纳米片。该材料通过简便的热解工艺获得。衍射分析显示了一个宽广的类似石墨烯结构的峰值，表明形成了类似石墨烯的碳纳米片。场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）图像证实了碎碳片的存在，其中一些被折叠形成管状结构。拉曼研究显示存在 D 和 G 波段，Id/Ig 比为 0.96，这表明形成了少层碳纳米片。此外，还对锂离子电池和超级电容器的电化学性能进行了评估。在 0.1 C 速率下，锂离子电池的比容量为 465 mAh.g-1，超级电容器的比电容为 473.61 F.g-1，电容保持率为 95%。这项研究为储能系统中天然纤维基碳的可持续生产和利用战略提供了启示。

{"title":"Natural Kapok fiber-derived two-dimensional carbonized sheets as sustainable electrode material","authors":"Vinay Gangaraju , Navya Rani M , Kunal Roy , Tathagata Sardar , Manikanta P Narayanaswamy , Murthy Muniyappa , Prasanna D Shivaramu , Dinesh Rangappa","doi":"10.1016/j.cartre.2024.100418","DOIUrl":"10.1016/j.cartre.2024.100418","url":null,"abstract":"<div><div>Natural biomass-derived carbon nanostructures have attracted research interest because of their unique surface and electrochemical properties. The present study embodied the carbonized micro-nano sheets derived from the low-cost natural source Kapok silk fiber. The material was obtained via a facile thermal pyrolysis process. Diffraction analysis showed a broad graphene structure-like peak, indicating the formation of graphene-like carbon nanosheets. Field emission scanning electron microscope (FESEM) and transmission electron microscopic (TEM) images confirmed the presence of fragmented carbon sheets, some of which were folded to form a tube-like structure. Raman study showed the presence of D and G band with the Id/Ig ratio of 0.96 which indicated the formation of few-layered carbon nanosheets. Furthermore, the electrochemical performance was evaluated for lithium-ion battery as well as supercapacitor. A specific capacity of 465 mAh.g<sup>-1</sup> at 0.1 C rate for Li-ion battery and a specific capacitance of 473.61 F.g<sup>-1</sup> for supercapacitor have been obtained with the capacitance retention of 95 %. This study provides insights into a strategy for the sustainable production and utilization of natural fiber-based carbon in energy storage systems.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100418"},"PeriodicalIF":3.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deposition of nanocomposite carbon-based thin films doped with copper and fluorine 掺杂铜和氟的碳基纳米复合薄膜的沉积

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2024-10-28 DOI: 10.1016/j.cartre.2024.100416

R. Pribyl, S. Kelarova, M. Karkus, V. Bursikova

This paper is focused on plasma-enhanced chemical vapor deposition (PECVD) of novel carbon-based thin films. Unique thin films were deposited from a mixture of methane, hydrogen, and a precursor containing fluorine and copper: (hfac)copperVTMS (hfac = hexafluoroacetylacetonato and VTMS = vinyltrimethylsilane). Using the (hfac)copperVTMS precursor in PECVD deposition results in the advantageous chemical composition of carbon-based thin films while maintaining sufficient mechanical properties. Furthermore, with optimized plasma parameters, the films deposited on the substrate exhibit a nanocomposite structure. This nanostructured surface can increase the surface area, which is beneficial for various applications, including antibacterial and antiviral properties. The radiofrequency glow discharge at low pressure (

\approx 70 Pa

) and power

P = 25 W

and

P = 250 W

was used for deposition. Deposited thin films were analyzed using X-ray photoelectron spectroscopy, water contact angle measurement, atomic force microscopy, and nanoindentation techniques. Despite the doping of carbon-based thin films with soft copper, the prepared films exhibited sufficient mechanical properties, which are crucial for the future implementation of this deposition process.

本文的重点是新型碳基薄膜的等离子体增强化学气相沉积（PECVD）。独特的薄膜是由甲烷、氢气以及含氟和铜的前驱体：(hfac)copperVTMS（hfac = 六氟乙酰丙酮，VTMS = 乙烯基三甲基硅烷）的混合物沉积而成的。在 PECVD 沉积过程中使用 (hfac)copperVTMS 前驱体可以获得碳基薄膜的有利化学成分，同时保持足够的机械性能。此外，通过优化等离子参数，沉积在基底上的薄膜呈现出纳米复合结构。这种纳米结构表面可增加表面积，有利于各种应用，包括抗菌和抗病毒性能。沉积采用低压（≈70Pa）、功率 P=25W 和 P=250W 的射频辉光放电。使用 X 射线光电子能谱、水接触角测量、原子力显微镜和纳米压痕技术对沉积的薄膜进行了分析。尽管在碳基薄膜中掺杂了软铜，但所制备的薄膜仍表现出足够的机械性能，这对今后实施这种沉积工艺至关重要。

{"title":"Deposition of nanocomposite carbon-based thin films doped with copper and fluorine","authors":"R. Pribyl, S. Kelarova, M. Karkus, V. Bursikova","doi":"10.1016/j.cartre.2024.100416","DOIUrl":"10.1016/j.cartre.2024.100416","url":null,"abstract":"<div><div>This paper is focused on plasma-enhanced chemical vapor deposition (PECVD) of novel carbon-based thin films. Unique thin films were deposited from a mixture of methane, hydrogen, and a precursor containing fluorine and copper: (hfac)copperVTMS (hfac = hexafluoroacetylacetonato and VTMS = vinyltrimethylsilane). Using the (hfac)copperVTMS precursor in PECVD deposition results in the advantageous chemical composition of carbon-based thin films while maintaining sufficient mechanical properties. Furthermore, with optimized plasma parameters, the films deposited on the substrate exhibit a nanocomposite structure. This nanostructured surface can increase the surface area, which is beneficial for various applications, including antibacterial and antiviral properties. The radiofrequency glow discharge at low pressure (<span><math><mrow><mo>≈</mo><mn>70</mn><mi>Pa</mi></mrow></math></span>) and power <span><math><mrow><mi>P</mi><mo>=</mo><mn>25</mn><mi>W</mi></mrow></math></span> and <span><math><mrow><mi>P</mi><mo>=</mo><mn>250</mn><mi>W</mi></mrow></math></span> was used for deposition. Deposited thin films were analyzed using X-ray photoelectron spectroscopy, water contact angle measurement, atomic force microscopy, and nanoindentation techniques. Despite the doping of carbon-based thin films with soft copper, the prepared films exhibited sufficient mechanical properties, which are crucial for the future implementation of this deposition process.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100416"},"PeriodicalIF":3.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Localized surface plasmon resonance induced nonlinear absorption and optical limiting activity of gold decorated graphene/MoS2 hybrid 金装饰石墨烯/MoS2 杂化物的局部表面等离子体共振诱导非线性吸收和光学极限活性

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2024-10-21 DOI: 10.1016/j.cartre.2024.100417

M. Abith, T.C. Sabari Girisun

The synergistic supremacy of a hybrid nanocomposite made of reduced graphene oxide (rGO), molybdenum disulfide (MoS₂) and gold nanoparticles (Au) for Q-switching and optical limiting applications is investigated. Hydrothermally synthesized Au-rGO-MoS₂ hybrid with varying concentrations of Au (2.5, 5, 7.5 and 10 wt%) was subjected to interact with Q-switched Nd:YAG nanosecond green laser pulses. The intensity dependent nonlinear absorption studies revealed a switch over in the nonlinear behaviour from saturable absorption (SA) to reverse saturable absorption (RSA) behaviour. SA occurs due to ground state bleaching at comparatively lower laser irradiances serving the need for Q-switching and optical communications. The RSA trait at higher laser irradiance is attributed to sequential two-photon absorption which serves as the platform for optical limiting behaviour prompting laser safety and effective photothermal therapy applications. The strong mid-visible and UV absorption promotes the availability of multiple energy bands for energy transitions of excited state absorption (ESA). Enhanced local fields due to localized surface plasmon resonance effect, structural defects, hierarchical morphology, increased absorption cross-section and plasmon induced energy transfer promotes robust ESA process. These tunable nonlinear optical properties make Au-rGO-MoS₂ hybrid promising futuristic candidates for applications in nonlinear photonic devices, ultrafast optical switches and all-optical signal processing systems.

本研究探讨了还原氧化石墨烯（rGO）、二硫化钼（MoS2）和金纳米粒子（Au）混合纳米复合材料在 Q 开关和光学限制应用中的协同优势。水热合成的 Au-rGO-MoS2 杂化物含有不同浓度的 Au（2.5、5、7.5 和 10 wt%），与 Q 开关 Nd:YAG 纳秒绿色激光脉冲相互作用。与强度相关的非线性吸收研究表明，非线性行为从可饱和吸收（SA）转换为反向可饱和吸收（RSA）行为。在相对较低的激光辐照度下，由于基态漂白，会产生可饱和吸收，从而满足 Q 开关和光通信的需要。较高激光辐照度下的 RSA 特性则归因于连续的双光子吸收，它是光限制行为的平台，可促进激光安全和有效的光热治疗应用。强烈的中可见光和紫外线吸收促进了激发态吸收（ESA）能量转换的多能带可用性。由于局部表面等离子体共振效应、结构缺陷、分层形貌、吸收截面增大以及等离子体诱导的能量转移，增强了局部场，从而促进了稳健的 ESA 过程。这些可调谐的非线性光学特性使得 Au-rGO-MoS2 混合材料在非线性光子器件、超快光开关和全光信号处理系统中的应用前景广阔。

{"title":"Localized surface plasmon resonance induced nonlinear absorption and optical limiting activity of gold decorated graphene/MoS2 hybrid","authors":"M. Abith, T.C. Sabari Girisun","doi":"10.1016/j.cartre.2024.100417","DOIUrl":"10.1016/j.cartre.2024.100417","url":null,"abstract":"<div><div>The synergistic supremacy of a hybrid nanocomposite made of reduced graphene oxide (rGO), molybdenum disulfide (MoS<sub>2</sub>) and gold nanoparticles (Au) for Q-switching and optical limiting applications is investigated. Hydrothermally synthesized Au-rGO-MoS<sub>2</sub> hybrid with varying concentrations of Au (2.5, 5, 7.5 and 10 wt%) was subjected to interact with Q-switched Nd:YAG nanosecond green laser pulses. The intensity dependent nonlinear absorption studies revealed a switch over in the nonlinear behaviour from saturable absorption (SA) to reverse saturable absorption (RSA) behaviour. SA occurs due to ground state bleaching at comparatively lower laser irradiances serving the need for Q-switching and optical communications. The RSA trait at higher laser irradiance is attributed to sequential two-photon absorption which serves as the platform for optical limiting behaviour prompting laser safety and effective photothermal therapy applications. The strong mid-visible and UV absorption promotes the availability of multiple energy bands for energy transitions of excited state absorption (ESA). Enhanced local fields due to localized surface plasmon resonance effect, structural defects, hierarchical morphology, increased absorption cross-section and plasmon induced energy transfer promotes robust ESA process. These tunable nonlinear optical properties make Au-rGO-MoS<sub>2</sub> hybrid promising futuristic candidates for applications in nonlinear photonic devices, ultrafast optical switches and all-optical signal processing systems.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100417"},"PeriodicalIF":3.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced storage performance of a low-cost hard carbon derived from biomass 提高从生物质中提取的低成本硬碳的储存性能

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends

Pub Date : 2024-10-19 DOI: 10.1016/j.cartre.2024.100415

Chen Wang , Debasis Sen , Vinod K. Aswal , Lan Weiguang , Palani Balaya

Hard Carbon is the most widely used negative electrode material for sodium-ion batteries today. Achieving high storage capacity and increasing the plateau capacity, as opposed to the sloping profile, are crucial for enhancing energy density of the full cells. While several publications address the synthesis of hard carbon, the economic viability for commercial scale-up hinges on the choice of precursors. In this study, we report the electrochemical properties of hard carbon derived from two biomass precursors, sugarcane waste (bagasse) and corn waste, and compare their performances with commercially available hard carbon. The hard carbon derived from bagasse delivers a capacity of 307 mAh/g at C/10 rate and retains approximately 234 mAh/g at 3C discharge rate. We integrate surface area, pore size distribution, Raman spectroscopy, small-angle X-ray and neutron scattering data to elucidate the sodium storage mechanism in these hard carbon samples. Correlated graphitic domains with hexagonal ordering along with fractal like agglomeration of the nanosheets are quantified. The high plateau capacity of the bagasse-derived hard carbon is attributed to the characteristic morphology and size distribution of the nanosheets and their nature of agglomeration.

硬碳是目前钠离子电池最广泛使用的负极材料。实现高存储容量和提高高原容量（而不是斜坡容量）对于提高全电池的能量密度至关重要。虽然有多篇论文论述了硬碳的合成，但商业放大的经济可行性取决于前驱体的选择。在本研究中，我们报告了从甘蔗渣和玉米渣这两种生物质前驱体中提取的硬质碳的电化学特性，并将它们的性能与市售硬质碳进行了比较。从甘蔗渣中提取的硬质碳在 C/10 放电速率下的容量为 307 mAh/g，在 3C 放电速率下的容量约为 234 mAh/g。我们整合了表面积、孔径分布、拉曼光谱、小角 X 射线和中子散射数据，以阐明这些硬碳样品中的钠存储机制。我们对具有六方有序性的相关石墨畴以及纳米片的分形聚集进行了量化。甘蔗渣衍生硬碳的高原容量归因于纳米片的特征形态和尺寸分布及其聚结性质。

{"title":"Enhanced storage performance of a low-cost hard carbon derived from biomass","authors":"Chen Wang , Debasis Sen , Vinod K. Aswal , Lan Weiguang , Palani Balaya","doi":"10.1016/j.cartre.2024.100415","DOIUrl":"10.1016/j.cartre.2024.100415","url":null,"abstract":"<div><div>Hard Carbon is the most widely used negative electrode material for sodium-ion batteries today. Achieving high storage capacity and increasing the plateau capacity, as opposed to the sloping profile, are crucial for enhancing energy density of the full cells. While several publications address the synthesis of hard carbon, the economic viability for commercial scale-up hinges on the choice of precursors. In this study, we report the electrochemical properties of hard carbon derived from two biomass precursors, sugarcane waste (bagasse) and corn waste, and compare their performances with commercially available hard carbon. The hard carbon derived from bagasse delivers a capacity of 307 mAh/g at C/10 rate and retains approximately 234 mAh/g at 3C discharge rate. We integrate surface area, pore size distribution, Raman spectroscopy, small-angle X-ray and neutron scattering data to elucidate the sodium storage mechanism in these hard carbon samples. Correlated graphitic domains with hexagonal ordering along with fractal like agglomeration of the nanosheets are quantified. The high plateau capacity of the bagasse-derived hard carbon is attributed to the characteristic morphology and size distribution of the nanosheets and their nature of agglomeration.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"17 ","pages":"Article 100415"},"PeriodicalIF":3.1,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0