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Unravelling the monomer molar ratio modulation of the optoelectronics of Poly(propylene imine) tetra(thiophen-2-ylmethylene-amine)-co-poly(3-hexylthiophene-2,5-diyl) copolymer 揭示聚(丙亚胺)四(噻吩-2-基亚甲基胺)-共聚(3-己基噻吩-2,5-二基)共聚物的单体摩尔比对光电子学的影响
IF 6.7 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-19 DOI: 10.1016/j.jsamd.2024.100816
Morongwa E. Ramoroka , Kelechi C. Nwambaekwe , Hayelom H. Tesfay , Miranda M. Ndipingwi , Vivian S. John-Denk , Kwena D. Modibane , Samantha F. Douman , Emmanuel I. Iwuoha
Tuning the molecular structure of a copolymer is of considerable importance for optimizing its optoelectronic and morphological properties. This will enormously help in improving and understanding the performance of a copolymer as a donor material in organic photovoltaic cells (OPVs). Herein, we reported a simple synthetic approach for developing a polypropylene imine tetra(thiophen-2-ylmethylene-amine)-co-poly(3-hexylthiophene-2,5-diyl) (P3HT-PT) using chemical oxidation polymerization. To the best of our knowledge, the investigations of monomer molar ratio have never been reported for synthesis of dendritic copolymers. Different concentrations of hexylthiophene (3HT) as a monomer for poly(3-hexylthiophene (P3HT) chains growth on the branches of polypropylene imine tetra(thiophen-2-ylmethylene-amine) (PPIT) as a dendritic core were studied. Nuclear magnetic resonance spectroscopy (NMR) confirmed that P3HT-PT has mixture of P3HT chains arrangements with different chain lengths. More head-to-tail arrangement was achieved at low concentration of 3HT. This study revealed that concentration of 3HT alter with optical, microscopic, electrochemical and thermal properties of P3HT-PT. Synthesized P3HT-PT polymers were further investigated as donor materials in OPVs. The investigations indicated that the P3HT-PT40 based OPV has better photovoltaic performance due to fewer aggregates and high crystallinity of P3HT-PT40, low LUMO energy levels offset and sufficient charge separation in comparison with P3HT-PT60 and P3HT-PT80 based OPVs.
调整共聚物的分子结构对于优化其光电和形态特性相当重要。这将大大有助于改善和了解共聚物作为有机光伏电池(OPV)供体材料的性能。在此,我们报告了一种利用化学氧化聚合法开发聚丙烯亚胺四(噻吩-2-基亚甲基胺)-共聚(3-己基噻吩-2,5-二基)(P3HT-PT)的简单合成方法。据我们所知,关于树枝状共聚物合成中单体摩尔比的研究还从未报道过。我们研究了不同浓度的己基噻吩(3HT)单体,用于在作为树枝状核的聚丙烯亚胺四(噻吩-2-基亚甲基胺)(PPIT)分支上生长聚(3-己基噻吩(P3HT))链。核磁共振光谱(NMR)证实,P3HT-PT 具有不同链长的 P3HT 链混合排列。在 3HT 浓度较低时,头尾排列更多。这项研究表明,3HT 的浓度会改变 P3HT-PT 的光学、显微、电化学和热学特性。研究人员将合成的 P3HT-PT 聚合物作为 OPV 的供体材料进行了进一步研究。研究表明,与基于 P3HT-PT60 和 P3HT-PT80 的 OPV 相比,基于 P3HT-PT40 的 OPV 具有更好的光电性能,因为 P3HT-PT40 的聚集体少、结晶度高、LUMO 能级偏移低且电荷分离充分。
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引用次数: 0
Photoactive integrated microfluidic valves for on-chip fluid control 用于片上流体控制的光活性集成微流控阀门
IF 6.7 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-17 DOI: 10.1016/j.jsamd.2024.100814
Christina Schmidleithner, Johannes R. Peham
In microfluidics, on-chip fluid control is crucial for applications where programmable and automated fluid handling with low dead volume and limited auxiliary equipment is desired. This is, for instance, the case for point-of-care (POC) devices, especially in low resource settings. The integration of photoactive valves into a disposable microfluidic chip is one method of attaining low-power and non-contact fluid control in the blink of an LED. A liquid crystal network (LCN) based micro-valve was developed, which enables rapid fluid transfer on-chip by opening a venting channel upon illumination at 80 mW cm-2 with a 455 nm wavelength LED. We show in two proof-of-principle devices that multiple valves can be integrated into a 3D-printed microfluidic chip. Their individual actuation leads to directed sequential filling as well as draining of a reaction chamber, providing the prerequisite for intricate on-chip processes. Thus, our photoactive valves show the potential of facilitating programmable lab-on-a-chip experiments, for instance, for sample preparation such as for bind-wash-elute protocols, for immunoassay, or for amplification-based detection methods.
在微流控技术中,片上流体控制对于需要可编程和自动化流体处理、低死体积和有限辅助设备的应用至关重要。例如,护理点(POC)设备就是这种情况,尤其是在资源匮乏的环境中。将光动阀集成到一次性微流控芯片中,是在 LED 闪烁时实现低功耗、非接触式流体控制的一种方法。我们开发了一种基于液晶网络(LCN)的微型阀门,它能在 455 纳米波长 LED 以 80 mW cm-2 的光照下打开一个排气通道,从而实现芯片上的快速流体传输。我们在两个原理验证装置中展示了多个阀门可以集成到 3D 打印微流控芯片中。它们的单独驱动导致反应室定向顺序填充和排空,为复杂的片上过程提供了先决条件。因此,我们的光活性阀门展示了促进可编程芯片实验室实验的潜力,例如,用于样品制备(如活洗消泡剂方案)、免疫测定或基于扩增的检测方法。
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引用次数: 0
AlCrO3-grafted g-C3N4 composite for cadmium ions removal: A paradigm shift in environmental remediation 用于去除镉离子的 AlCrO3 接枝 g-C3N4 复合材料:环境修复范式的转变
IF 6.7 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.jsamd.2024.100807
Zainab M.H. El-Qahtani , A. Modwi , K.H. Ibnaouf , Hanadi M. AbdelSalam , Tahani M. Albogami , Adel A. Bahaddad
The appealing graphitic phase carbon nitride (g-C3N4) is extensively utilized for environmental remediation; however, some of its intrinsic drawbacks still need to be amended. Herein, the g-C3N4 quality was improved by anchoring to AlCrO3 nanoparticles to acquire a competent ternary AlCrO3@g-C3N4 composite for the cadmium ions elimination. The composite elemental compositions were verified by the EDX and XPS to specify the C, N, Cr, Al, and O as the composing elements, and the XRD structural analysis revealed the development of both the g-C3N4 and AlCrO3. The presence of some functional groups (C–N, CN, –NH–, –NH2, and –OH) as detected by the FTIR and a large surface area of 89.94 m2 g−1 qualified it to successfully eliminate.mg.g−1 of Cd+2 ions from an aqueous solution. The Cd+2 ion adsorption was found to follow the Langmuir isotherm model, while the kinetics matched with the pseudo-second-order style. The high adsorption aptitude of the synthesized adsorbent could be accredited to the numerous adsorption sites, π-π conjugate interactions, and electrostatic attractions with the metal ions in water as publicized by mechanistic study.
具有吸引力的石墨相氮化碳(g-C3N4)被广泛用于环境修复,但其固有的一些缺点仍有待改进。本文通过将 g-C3N4 与 AlCrO3 纳米颗粒锚定,提高了 g-C3N4 的质量,从而获得了一种用于消除镉离子的 AlCrO3@g-C3N4 三元复合材料。该复合材料的元素组成经 EDX 和 XPS 验证,确定组成元素为 C、N、Cr、Al 和 O,XRD 结构分析表明 g-C3N4 和 AlCrO3 均有发展。傅立叶变换红外光谱(FTIR)检测到了一些官能团(C-N、CN、-NH-、-NH2 和 -OH)的存在,以及 89.94 m2 g-1 的大比表面积,使其能够成功地从水溶液中去除毫克/克的 Cd+2 离子。研究发现,Cd+2 离子的吸附遵循 Langmuir 等温线模型,而动力学则符合假二阶模式。机理研究表明,合成吸附剂的高吸附能力可归因于其具有众多的吸附位点、π-π 共轭相互作用以及与水中金属离子的静电吸引。
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引用次数: 0
Enhancing microstructure, nanomechanical and anti-wear characteristics of spark plasma sintered Ti6Al4V alloy via nickel-silicon carbide addition 通过添加碳化镍硅提高火花等离子烧结 Ti6Al4V 合金的微观结构、纳米力学和抗磨损特性
IF 6.7 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.jsamd.2024.100810
Azeez Lawan Rominiyi , Peter Madindwa Mashinini , Olugbenga Ogunbiyi
This study examines the nanomechanical and anti-wear behaviour of spark plasma sintered Ti6Al4V matrix composites reinforced with Ni and SiC particles. Microstructural analysis revealed the in-situ formation of the hard TiC, Ti3SiC2 and Ti5Si3 phases within the metal matrix. Nanoindentation analysis revealed that the composite containing 10 wt% SiC (TNi10SiC) exhibited significantly higher nanohardness (about 10.3 GPa) and elastic modulus (∼177.7 GPa) than the unreinforced Ti6Al4V alloy (sample T). The improved nanomechanical performance of the composites was attributed to the load-carrying capacity of the hard, in-situ formed reinforcement phases. The anti-wear characteristics of the composites showed that TNi5SiC composite displayed superior wear resistance with a specific wear rate of 4.75 ± 0.34 × 10−4 mm3/Nm and 2.15 ± 0.34 × 10−4 mm3/Nm under an applied loads of 10 N and 20 N, respectively, among the sintered samples. This represents about 67% and 29% reduction in specific wear rate relative to sample T. This enhanced tribological behaviour was ascribed to the increased surface hardness, the formation of a stable transfer layer, and the reduction in direct asperity contact at the sliding interfaces. However, reinforcement pull-out aggravates abrasive wear and leads to a higher specific wear rate for TNi10SiC composite. This work provides valuable information for advancing Ti6Al4V-based composites for enhanced structural and wear-resistant applications.
本研究探讨了以 Ni 和 SiC 粒子增强的火花等离子烧结 Ti6Al4V 基复合材料的纳米机械性能和抗磨损性能。微观结构分析表明,在金属基体中原位形成了硬质 TiC、Ti3SiC2 和 Ti5Si3 相。纳米压痕分析表明,含 10 wt% SiC 的复合材料(TNi10SiC)的纳米硬度(约 10.3 GPa)和弹性模量(∼177.7 GPa)明显高于未增强的 Ti6Al4V 合金(样品 T)。复合材料纳米力学性能的提高归功于原位形成的坚硬增强相的承载能力。复合材料的抗磨损特性表明,TNi5SiC 复合材料具有优异的耐磨性,在 10 N 和 20 N 的外加载荷下,烧结样品的比磨损率分别为 4.75 ± 0.34 × 10-4 mm3/Nm 和 2.15 ± 0.34 × 10-4 mm3/Nm。这种摩擦学性能的增强归因于表面硬度的提高、稳定转移层的形成以及滑动界面上表面直接接触的减少。然而,强化拉出加剧了磨料磨损,导致 TNi10SiC 复合材料的特定磨损率更高。这项研究为推动基于 Ti6Al4V 的复合材料在增强结构和耐磨方面的应用提供了有价值的信息。
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引用次数: 0
Advanced oxidation processes over Fe doped Bi2WO6 photocatalysts toward rhodamine B and cefalexin treatment
IF 6.7 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.jsamd.2024.100815
Phuong Hoang Nguyen , Thang Quoc Nguyen , Thi Thu Nhu Vo , Thi Minh Cao , Viet Van Pham
Industrial wastewater, contaminated by dyes and antibiotics, poses significant environmental challenges. We developed Fe-doped Bi2WO6 (Fe:Bi2WO6) photocatalysts to enhance the photocatalytic activity and stability of Bi2WO6. The advanced oxidation processes (AOPs) of Fe, including the photo-Fenton process for rhodamine B (RhB) degradation and peroxymonosulfate (PMS) activation for Cefalexin (CFX) degradation, were investigated. The Fe doping altered the crystallization of Bi2WO6 and improved its photocatalytic performance, achieving 97.7% RhB degradation and 70.6% CFX degradation within 180 min. These results highlighted the potential of Fe:Bi2WO6 photocatalysts in wastewater treatment, emphasizing their stability and high activity across various conditions.
{"title":"Advanced oxidation processes over Fe doped Bi2WO6 photocatalysts toward rhodamine B and cefalexin treatment","authors":"Phuong Hoang Nguyen ,&nbsp;Thang Quoc Nguyen ,&nbsp;Thi Thu Nhu Vo ,&nbsp;Thi Minh Cao ,&nbsp;Viet Van Pham","doi":"10.1016/j.jsamd.2024.100815","DOIUrl":"10.1016/j.jsamd.2024.100815","url":null,"abstract":"<div><div>Industrial wastewater, contaminated by dyes and antibiotics, poses significant environmental challenges. We developed Fe-doped Bi<sub>2</sub>WO<sub>6</sub> (Fe:Bi<sub>2</sub>WO<sub>6</sub>) photocatalysts to enhance the photocatalytic activity and stability of Bi<sub>2</sub>WO<sub>6</sub>. The advanced oxidation processes (AOPs) of Fe, including the photo-Fenton process for rhodamine B (RhB) degradation and peroxymonosulfate (PMS) activation for Cefalexin (CFX) degradation, were investigated. The Fe doping altered the crystallization of Bi<sub>2</sub>WO<sub>6</sub> and improved its photocatalytic performance, achieving 97.7% RhB degradation and 70.6% CFX degradation within 180 min. These results highlighted the potential of Fe:Bi<sub>2</sub>WO<sub>6</sub> photocatalysts in wastewater treatment, emphasizing their stability and high activity across various conditions.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 1","pages":"Article 100815"},"PeriodicalIF":6.7,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing 3D scaffold performance for bone tissue engineering: A comprehensive review of modification and functionalization strategies 增强三维支架在骨组织工程中的性能:改性和功能化策略综述
IF 6.7 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.jsamd.2024.100806
M. Selim , Hamouda M. Mousa , Muhammad Umar Aslam Khan , Gamal T. Abdel-Jaber , Nabisab Mujawar Mubarak , Ahmed Barhoum , Abdulaziz Al-Anazi , Abdalla Abdal-hay
Bone tissue engineering holds promise for addressing bone injuries by using biomaterial-based 3D scaffolds. The efficacy of these scaffolds is paramount, relying heavily on their ability to interact with cells and facilitate tissue regeneration. This comprehensive review delves into various modification and functionalization strategies to enhance the performance of biomaterial 3D scaffolds in bone tissue engineering. The review encompasses a wide range of techniques, including physical methods such as surface roughening and patterning, and chemical modifications like plasma treatment and functional group grafting. Additionally, surface-coating approaches employing biomolecules and nanoparticles are explored. Synthesizing current research findings offers valuable insights into optimizing biomaterial scaffolds for effective bone tissue regeneration applications. In addition, discussions encompass the influence of scaffold morphology, mechanical properties, and degradation kinetics on cellular responses and tissue integration. By thoroughly examining these strategies, future research will be guided toward developing advanced biomaterial scaffolds tailored specifically for bone tissue engineering applications.
骨组织工程有望利用基于生物材料的三维支架解决骨损伤问题。这些支架的功效至关重要,主要取决于它们与细胞相互作用和促进组织再生的能力。本综述深入探讨了各种改性和功能化策略,以提高生物材料三维支架在骨组织工程中的性能。综述涵盖了广泛的技术,包括表面粗化和图案化等物理方法,以及等离子处理和官能团接枝等化学修饰方法。此外,还探讨了采用生物分子和纳米颗粒的表面涂层方法。综合当前的研究成果,为优化生物材料支架以实现有效的骨组织再生应用提供了宝贵的见解。此外,还讨论了支架形态、机械性能和降解动力学对细胞反应和组织整合的影响。通过深入研究这些策略,未来的研究将朝着开发专门用于骨组织工程应用的先进生物材料支架的方向发展。
{"title":"Enhancing 3D scaffold performance for bone tissue engineering: A comprehensive review of modification and functionalization strategies","authors":"M. Selim ,&nbsp;Hamouda M. Mousa ,&nbsp;Muhammad Umar Aslam Khan ,&nbsp;Gamal T. Abdel-Jaber ,&nbsp;Nabisab Mujawar Mubarak ,&nbsp;Ahmed Barhoum ,&nbsp;Abdulaziz Al-Anazi ,&nbsp;Abdalla Abdal-hay","doi":"10.1016/j.jsamd.2024.100806","DOIUrl":"10.1016/j.jsamd.2024.100806","url":null,"abstract":"<div><div>Bone tissue engineering holds promise for addressing bone injuries by using biomaterial-based 3D scaffolds. The efficacy of these scaffolds is paramount, relying heavily on their ability to interact with cells and facilitate tissue regeneration. This comprehensive review delves into various modification and functionalization strategies to enhance the performance of biomaterial 3D scaffolds in bone tissue engineering. The review encompasses a wide range of techniques, including physical methods such as surface roughening and patterning, and chemical modifications like plasma treatment and functional group grafting. Additionally, surface-coating approaches employing biomolecules and nanoparticles are explored. Synthesizing current research findings offers valuable insights into optimizing biomaterial scaffolds for effective bone tissue regeneration applications. In addition, discussions encompass the influence of scaffold morphology, mechanical properties, and degradation kinetics on cellular responses and tissue integration. By thoroughly examining these strategies, future research will be guided toward developing advanced biomaterial scaffolds tailored specifically for bone tissue engineering applications.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100806"},"PeriodicalIF":6.7,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Photocatalytic degradation of Rhodamine B using a reusable and magnetically separable Fe3O4/rGO/ZnO nanocomposite synthesized through green approach utilizing plant leaf extracts 利用植物叶提取物通过绿色方法合成的可重复使用且磁性可分离的 Fe3O4/rGO/ZnO 纳米复合材料光催化降解罗丹明 B
IF 6.7 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.jsamd.2024.100812
Nugraheni Puspita Rini , Zurnansyah , Dyah Ayu Larasati , Larrisa Jestha Mahardhika , Putri Dwi Jayanti , Hafil Perdana Kusumah , Nurul Imani Istiqomah , Rivaldo Marsel Tumbelaka , Nining Sumawati Asri , Julia Angel , Takeshi Kato , Daiki Oshima , Hasniah Aliah , Ahmad Kusumaatmaja , Edi Suharyadi
We propose the magnetically separable, green synthesis of Fe3O4/rGO/ZnO using a higher mass ratio of Fe3O4/rGO and varying ZnO concentration to degrade an aqueous solution of Rhodamin B under Fenton reaction and UV light irradiation. Fe3O4 had been synthesized under the coprecipitation method utilizing Moringa oleifera leaf, while rGO had been fabricated by sonicating GO utilizing Amaranthus viridis leaf. Afterward, Fe3O4/rGO was composited under a facile method with a mass ratio of 5:5. And the last, Fe3O4/rGO/ZnO was green-synthesized through precipitation method using Amaranthus viridis leaf with various molarity ratio of Fe3O4/rGO: ZnO equal to 1:1, 1:2, 1:3, 1:4, and 1:5. X-ray diffraction revealed the presence of Fe3O4 and ZnO phases, while Raman spectroscopy confirmed the successful reduction of GO to rGO. The morphological analysis demonstrated that the particles were nearly spherical, nonuniform, and slightly dispersed, with some agglomeration observed on the rGO sheets. Fourier-transform infrared spectroscopy identified metallic functional groups, including Fe–O and Zn–O, at 524–570 cm−1 and 447–462 cm−1, respectively. However, redshift absorption and band gap narrowing were observed as the ZnO concentration increased. Photoluminescence analysis revealed that increased ZnO concentration reduces recombination and improves charge separation efficiency. The vibrating sample magnetometer exhibited soft magnetic properties. The magnetization of Fe3O4/rGO saturated at 21.7 emu/g and diminished as incorporated ZnO. The photodegradation increased with the increase of ZnO concentration, reaching its optimum at 1:5, about 89.9%. Fe3O4/rGO/ZnO demonstrates a possible ecologically friendly photocatalyst for wastewater remediation. The photocatalyst can be reused for up to three cycles with no significant change in its performance. Scavenger evaluation indicates that electrons and holes are the predominant reactive species in the photocatalytic reaction involving Fe₃O₄/rGO/ZnO.
我们提出了可磁性分离的 Fe3O4/rGO/ZnO 绿色合成方法,利用较高的 Fe3O4/rGO 质量比和不同浓度的 ZnO,在芬顿反应和紫外光照射下降解罗丹明 B 水溶液。Fe3O4是利用Moringa oleifera叶片通过共沉淀法合成的,而rGO则是利用Amaranthus viridis叶片通过超声GO制备的。随后,Fe3O4/rGO 以 5:5 的质量比通过简便的方法合成。最后,利用苋菜叶通过沉淀法绿色合成了 Fe3O4/rGO/ZnO,Fe3O4/rGO:ZnO 的不同摩尔比分别为 1:1、1:2、1:3、1:4 和 1:5。X 射线衍射显示了 Fe3O4 和 ZnO 相的存在,而拉曼光谱则证实了 GO 成功还原为 rGO。形态分析表明,颗粒接近球形,不均匀,略微分散,在 rGO 片上观察到一些团聚现象。傅立叶变换红外光谱鉴定出金属官能团,包括 Fe-O 和 Zn-O,分别位于 524-570 cm-1 和 447-462 cm-1。然而,随着氧化锌浓度的增加,观察到了红移吸收和带隙变窄。光致发光分析表明,氧化锌浓度增加可减少重组,提高电荷分离效率。振动样品磁力计具有软磁特性。Fe3O4/rGO 的磁化率在 21.7 emu/g 时达到饱和,并随着 ZnO 的加入而降低。光降解率随着 ZnO 浓度的增加而增加,在 1:5 时达到最佳,约为 89.9%。Fe3O4/rGO/ZnO 展示了一种可能用于废水修复的生态友好型光催化剂。该光催化剂可重复使用长达三个周期,且性能无明显变化。清除剂评估表明,电子和空穴是 Fe₃O₄/rGO/ZnO 光催化反应中的主要反应物。
{"title":"Photocatalytic degradation of Rhodamine B using a reusable and magnetically separable Fe3O4/rGO/ZnO nanocomposite synthesized through green approach utilizing plant leaf extracts","authors":"Nugraheni Puspita Rini ,&nbsp;Zurnansyah ,&nbsp;Dyah Ayu Larasati ,&nbsp;Larrisa Jestha Mahardhika ,&nbsp;Putri Dwi Jayanti ,&nbsp;Hafil Perdana Kusumah ,&nbsp;Nurul Imani Istiqomah ,&nbsp;Rivaldo Marsel Tumbelaka ,&nbsp;Nining Sumawati Asri ,&nbsp;Julia Angel ,&nbsp;Takeshi Kato ,&nbsp;Daiki Oshima ,&nbsp;Hasniah Aliah ,&nbsp;Ahmad Kusumaatmaja ,&nbsp;Edi Suharyadi","doi":"10.1016/j.jsamd.2024.100812","DOIUrl":"10.1016/j.jsamd.2024.100812","url":null,"abstract":"<div><div>We propose the magnetically separable, green synthesis of Fe<sub>3</sub>O<sub>4</sub>/rGO/ZnO using a higher mass ratio of Fe<sub>3</sub>O<sub>4</sub>/rGO and varying ZnO concentration to degrade an aqueous solution of Rhodamin B under Fenton reaction and UV light irradiation. Fe<sub>3</sub>O<sub>4</sub> had been synthesized under the coprecipitation method utilizing <em>Moringa oleifera</em> leaf, while rGO had been fabricated by sonicating GO utilizing <em>Amaranthus viridis</em> leaf. Afterward, Fe<sub>3</sub>O<sub>4</sub>/rGO was composited under a facile method with a mass ratio of 5:5. And the last, Fe<sub>3</sub>O<sub>4</sub>/rGO/ZnO was green-synthesized through precipitation method using <em>Amaranthus viridis</em> leaf with various molarity ratio of Fe<sub>3</sub>O<sub>4</sub>/rGO: ZnO equal to 1:1, 1:2, 1:3, 1:4, and 1:5. X-ray diffraction revealed the presence of Fe<sub>3</sub>O<sub>4</sub> and ZnO phases, while Raman spectroscopy confirmed the successful reduction of GO to rGO. The morphological analysis demonstrated that the particles were nearly spherical, nonuniform, and slightly dispersed, with some agglomeration observed on the rGO sheets. Fourier-transform infrared spectroscopy identified metallic functional groups, including Fe–O and Zn–O, at 524–570 cm<sup>−1</sup> and 447–462 cm<sup>−1</sup>, respectively. However, redshift absorption and band gap narrowing were observed as the ZnO concentration increased. Photoluminescence analysis revealed that increased ZnO concentration reduces recombination and improves charge separation efficiency. The vibrating sample magnetometer exhibited soft magnetic properties. The magnetization of Fe<sub>3</sub>O<sub>4</sub>/rGO saturated at 21.7 emu/g and diminished as incorporated ZnO. The photodegradation increased with the increase of ZnO concentration, reaching its optimum at 1:5, about 89.9%. Fe<sub>3</sub>O<sub>4</sub>/rGO/ZnO demonstrates a possible ecologically friendly photocatalyst for wastewater remediation. The photocatalyst can be reused for up to three cycles with no significant change in its performance. Scavenger evaluation indicates that electrons and holes are the predominant reactive species in the photocatalytic reaction involving Fe₃O₄/rGO/ZnO.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100812"},"PeriodicalIF":6.7,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A detailed study on the physical, mechanical, structural and gamma ray shielding properties of Al2O3–Na2O–SiO2–B2O3–Bi2O3glass system 关于 Al2O3-Na2O-SiO2-B2O3-Bi2O3 玻璃体系的物理、机械、结构和伽马射线屏蔽性能的详细研究
IF 6.7 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.jsamd.2024.100809
M.I. Sayyed , Ashok Kumar , Taha A. Hanafy , Yasser Maghrbi
The density, boron–boron separation, and molar volume of 4Al2O3–12Na2O-(18-x)SiO2-(64-x) B2O3-(2+2x)Bi2O3 (where x = 2, 4, 6 and 8 mol%) are increasing with the addition of Bi2O3. The addition of Bi2O3 results in an open network structure. The elastic moduli decrease from 34.711 to 29.875 GPa for Young modulus (E); 20.395 to 15.843 GPa for bulk modulus (B); from 15.257 to 13.494 GPa for shear modulus (G) and 40.738 to 33.836 GPa for longitudinal (L) respectively with increased Bi2O3 concentration. FTIR spectrainvestigation found BO3, BO4, SiO4, and BiO6 structural units to be present. The glasses' highest mass attenuation coefficient (MAC) is at 0.0395 MeV, the lowest energy value. It gradually decreases as energy increases. There is a decrease in the linear attenuation coefficient (LAC) values with energy. Sample Bi18 has the highest MAC and LAC values due to its high concentration of Bi2O3. Across the entire energy range, sample Bi18 has the highest effective atomic number, and the lowest half value layer and mean free path values across all energy values. The transmission factor (TF) values for Bi6 indicate that the required thickness for blocking 90% of the radiation must be greater than the thickness necessaryfor the attenuation of 50%. Bi18 has the lowest TF compared to other glass samples. The radiation protection efficiency values for Bi18 are highest, confirming their full protection ability. Bi18's is the best choice for radiation shielding.
随着 Bi2O3 的加入,4Al2O3-12Na2O-(18-x)SiO2-(64-x) B2O3-(2+2x)Bi2O3(其中 x = 2、4、6 和 8 mol%)的密度、硼-硼分离度和摩尔体积都在增加。加入 Bi2O3 后,形成了开放式网络结构。随着 Bi2O3 浓度的增加,杨氏模量(E)从 34.711 GPa 降至 29.875 GPa,体积模量(B)从 20.395 GPa 降至 15.843 GPa,剪切模量(G)从 15.257 GPa 降至 13.494 GPa,纵向模量(L)从 40.738 GPa 降至 33.836 GPa。傅立叶变换红外光谱分析发现,玻璃中存在 BO3、BO4、SiO4 和 BiO6 结构单元。玻璃的最高质量衰减系数(MAC)位于 0.0395 MeV,即最低能量值。随着能量的增加,质量衰减系数逐渐降低。线性衰减系数 (LAC) 值也随着能量的增加而降低。样品 Bi18 的 MAC 值和 LAC 值最高,这是因为它含有高浓度的 Bi2O3。在整个能量范围内,样品 Bi18 的有效原子序数最高,半值层和平均自由路径值在所有能量值中最低。Bi6 的透射系数 (TF) 值表明,阻挡 90% 辐射所需的厚度必须大于衰减 50% 辐射所需的厚度。与其他玻璃样品相比,Bi18 的透射系数最低。Bi18 的辐射防护效率值最高,证明其具有全面的防护能力。Bi18 是辐射屏蔽的最佳选择。
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引用次数: 0
Transition metal oxide based resistive random-access memory: An overview of materials and device performance enhancement techniques 基于过渡金属氧化物的电阻式随机存取存储器:材料和器件性能增强技术概述
IF 6.7 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.jsamd.2024.100813
Disha Yadav , Amit Krishna Dwivedi , Shammi Verma , Devesh Kumar Avasthi
The emergence of the big data era has led to enormous demand for memory devices that are low cost, flexible, fabrication friendly, transparent, energy efficient, and have a higher density. Resistive random-access memory (RRAM) is an outstanding emerging non-volatile memory technology that has the potential to change the avenue of future storage devices. It is a promising technology owing to its attributes like minimal power usage, simple structure, long endurance cycles, high retention time, integrability with the existing complementary metal oxide semiconductor process (CMOS), and excellent scalability. It is highly attractive for several applications like neuromorphic computing, Internet of Things, non-volatile logics, hardware security, and radiation hardened electronics. Despite significant advances in the field of RRAM, materials and recent advanced techniques to enhance its performance have not been reviewed in detail. This paper provides an in-depth review of recent advancements in the field of RRAM, including the material used for fabrication and the methods to enhance the device performance. Advanced materials, especially transition metal oxides like copper oxide, nickel oxide, zinc oxide, tantalum oxide, titanium oxide, and hafnium oxide, used to fabricate RRAM devices are reviewed and their impacts on the performance have been discussed. The key figure of merits such as endurance, retention, and multi-bit capability are studied in relation to resistive switching memories. Several methods such as structure engineering, doping, annealing, light irradiation, plasma treatment, and ion irradiation used to enhance devices' performance are discussed. Furthermore, the impact of low and high energy ion irradiation on RRAM's electrical performance is provided in detail. Finally, this paper provides directions for future research in this field based on the findings of this review.
大数据时代的来临导致人们对低成本、灵活、便于制造、透明、节能和高密度的存储设备产生了巨大需求。电阻式随机存取存储器(RRAM)是一种出色的新兴非易失性存储器技术,有可能改变未来存储设备的发展方向。由于它具有耗电少、结构简单、耐用周期长、保持时间长、可与现有的互补金属氧化物半导体工艺(CMOS)集成以及出色的可扩展性等特点,因此是一种前景广阔的技术。它对神经形态计算、物联网、非易失性逻辑、硬件安全和辐射加固电子器件等多种应用极具吸引力。尽管 RRAM 领域取得了重大进展,但增强其性能的材料和最新先进技术尚未得到详细评述。本文深入评述了 RRAM 领域的最新进展,包括用于制造的材料和提高器件性能的方法。本文回顾了用于制造 RRAM 器件的先进材料,特别是过渡金属氧化物,如氧化铜、氧化镍、氧化锌、氧化钽、氧化钛和氧化铪,并讨论了它们对器件性能的影响。研究了与电阻开关存储器有关的主要优点,如耐用性、保持性和多位能力。还讨论了用于提高器件性能的几种方法,如结构工程、掺杂、退火、光照射、等离子处理和离子照射。此外,还详细介绍了低能量和高能量离子辐照对 RRAM 电性能的影响。最后,本文在综述结论的基础上为该领域的未来研究指明了方向。
{"title":"Transition metal oxide based resistive random-access memory: An overview of materials and device performance enhancement techniques","authors":"Disha Yadav ,&nbsp;Amit Krishna Dwivedi ,&nbsp;Shammi Verma ,&nbsp;Devesh Kumar Avasthi","doi":"10.1016/j.jsamd.2024.100813","DOIUrl":"10.1016/j.jsamd.2024.100813","url":null,"abstract":"<div><div>The emergence of the big data era has led to enormous demand for memory devices that are low cost, flexible, fabrication friendly, transparent, energy efficient, and have a higher density. Resistive random-access memory (RRAM) is an outstanding emerging non-volatile memory technology that has the potential to change the avenue of future storage devices. It is a promising technology owing to its attributes like minimal power usage, simple structure, long endurance cycles, high retention time, integrability with the existing complementary metal oxide semiconductor process (CMOS), and excellent scalability. It is highly attractive for several applications like neuromorphic computing, Internet of Things, non-volatile logics, hardware security, and radiation hardened electronics. Despite significant advances in the field of RRAM, materials and recent advanced techniques to enhance its performance have not been reviewed in detail. This paper provides an in-depth review of recent advancements in the field of RRAM, including the material used for fabrication and the methods to enhance the device performance. Advanced materials, especially transition metal oxides like copper oxide, nickel oxide, zinc oxide, tantalum oxide, titanium oxide, and hafnium oxide, used to fabricate RRAM devices are reviewed and their impacts on the performance have been discussed. The key figure of merits such as endurance, retention, and multi-bit capability are studied in relation to resistive switching memories. Several methods such as structure engineering, doping, annealing, light irradiation, plasma treatment, and ion irradiation used to enhance devices' performance are discussed. Furthermore, the impact of low and high energy ion irradiation on RRAM's electrical performance is provided in detail. Finally, this paper provides directions for future research in this field based on the findings of this review.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100813"},"PeriodicalIF":6.7,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of an agglomeration-suppressed metal island buffer layer on nanostructure of FePt-oxide granular films for heat assisted magnetic recording media
IF 6.7 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.jsamd.2024.100808
Kim Kong Tham , Ryosuke Kushibiki , Daiki Miyazaki , Shin Saito
Investigation of nanostructure and magnetic properties of granular films deposited with a Carbon-Pt buffer layer (BL) as an agglomeration-suppressed metal island BL is reported. Compared with the granular film deposited on an agglomerated BL, Carbon BL, grains separation are promoted. BL with thickness thicker than 0.6 nm and Pt content of 40–70 vol% in the BL is effective to suppress the grain agglomeration. Similar to Carbon BL, (001) in-plane component in the granular film fabricated with Carbon-Pt BL is also reduced significantly. The suppression of material diffusion from BL to the granular films will enhance magnetic anisotropy energy of the granular films.
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Journal of Science: Advanced Materials and Devices
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