Carbon最新文献 - Book学术

Recycling of graphite from spent lithium–ion batteries via low-temperature polyvinyl chloride roasting-assisted leaching

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-03-01 DOI: 10.1016/j.carbon.2025.120182

Guisheng Zeng , Rui Zhou , Chongwen Hu , Haohan Zhao , Hanxiao Gao , Jianwen Huang , Jiaping Yu , Feng Luo , Zhongbing Wang , Chunjian Deng , Junwei He , Chunli Liu

With the widespread application of lithium-ion batteries, the recycling of lithium batteries has attracted widespread attention. Unfortunately, the low economic value of spent graphite often leads to their neglect. This work proposes a novel scheme of efficient purification and high-quality regeneration of graphite from spent LIBs by low-temperature spent polyvinyl chloride (PVC) roasting-assisted leaching. Through low-temperature PVC roasting, the metal impurities of spent graphite were converted into water-soluble metal chloride, and the roasting tail gas was absorbed by water and converted into absorption liquor. After the leaching using the absorption liquor, the purity of the purified graphite exceeded 99.9%. Subsequently, the material was reheated at 1000°C to produce regenerated graphite. The material structure, including interlayer spacing and surface morphology, were significantly repaired, aligning with those of commercial graphite. The cyclic stability had been powerfully promoted, after 500 cycles at 1 C, the specific capacity of regenerated graphite remained at 111.5 mAh/g, with a retention rate of 75% (spent graphite was 43.4 mAh/g, 33%) and a coulombic efficiency exceeding 99%, demonstrating good rate performance and cycling stability. This technology not only reduces the regeneration costs of graphite materials but also achieves environmental benefits through the principle of “treating waste with waste”.

{"title":"Recycling of graphite from spent lithium–ion batteries via low-temperature polyvinyl chloride roasting-assisted leaching","authors":"Guisheng Zeng , Rui Zhou , Chongwen Hu , Haohan Zhao , Hanxiao Gao , Jianwen Huang , Jiaping Yu , Feng Luo , Zhongbing Wang , Chunjian Deng , Junwei He , Chunli Liu","doi":"10.1016/j.carbon.2025.120182","DOIUrl":"10.1016/j.carbon.2025.120182","url":null,"abstract":"<div><div>With the widespread application of lithium-ion batteries, the recycling of lithium batteries has attracted widespread attention. Unfortunately, the low economic value of spent graphite often leads to their neglect. This work proposes a novel scheme of efficient purification and high-quality regeneration of graphite from spent LIBs by low-temperature spent polyvinyl chloride (PVC) roasting-assisted leaching. Through low-temperature PVC roasting, the metal impurities of spent graphite were converted into water-soluble metal chloride, and the roasting tail gas was absorbed by water and converted into absorption liquor. After the leaching using the absorption liquor, the purity of the purified graphite exceeded 99.9%. Subsequently, the material was reheated at 1000°C to produce regenerated graphite. The material structure, including interlayer spacing and surface morphology, were significantly repaired, aligning with those of commercial graphite. The cyclic stability had been powerfully promoted, after 500 cycles at 1 C, the specific capacity of regenerated graphite remained at 111.5 mAh/g, with a retention rate of 75% (spent graphite was 43.4 mAh/g, 33%) and a coulombic efficiency exceeding 99%, demonstrating good rate performance and cycling stability. This technology not only reduces the regeneration costs of graphite materials but also achieves environmental benefits through the principle of “treating waste with waste”.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120182"},"PeriodicalIF":10.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flexible rubber-based nanocomposite with superior electromagnetic interference shielding and joule heating

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-03-01 DOI: 10.1016/j.carbon.2025.120180

Ali Dehghani, Pradeep Sambyal, Mohammad Arjmand

Flexible multifunctional electromagnetic interference (EMI) shields that integrate effective electromagnetic wave (EMW) absorption, and efficient Joule heating are highly sought after for advanced electronic applications. In this study, we developed a robust, flexible, and multifunctional multi-layered gradient system using a two-step fabrication process, which includes compound solution mixing followed by hot press molding. The system consists of alternating magnetic layers (carbonized metal-organic framework (CMOF)/styrene butadiene rubber (SBR)) and conductive layers (carbon nanotube (CNT)/SBR). The resulting CNT-reinforced gradient nanocomposite exhibits impressive mechanical properties, with an elongation at break reaching up to 120 % and ultimate stress up to 13 MPa. Leveraging an absorption-reflection-reabsorption mechanism, the multi-layered gradient nanocomposite achieved an absorption rate of up to 57 % and an EMI shielding effectiveness (EMI SE) of 50 dB at a thickness of just 1 mm. Notably, the flexible structure maintains its performance after 500 cycles of bending and twisting, with only minimal reduction in EMI SE, retaining values of 47 dB and 46 dB, respectively. Furthermore, the composite demonstrates efficient electro-thermal conversion, achieving a steady-state temperature of 152 °C under a driving voltage of 10V. In short, this study presents an innovative approach to designing absorption-dominant, high-performance EMI shielding structures that combine mechanical robustness, and Joule heating capabilities, positioning it as a promising candidate for next-generation advanced electronic devices and energy conversion systems.

{"title":"Flexible rubber-based nanocomposite with superior electromagnetic interference shielding and joule heating","authors":"Ali Dehghani, Pradeep Sambyal, Mohammad Arjmand","doi":"10.1016/j.carbon.2025.120180","DOIUrl":"10.1016/j.carbon.2025.120180","url":null,"abstract":"<div><div>Flexible multifunctional electromagnetic interference (EMI) shields that integrate effective electromagnetic wave (EMW) absorption, and efficient Joule heating are highly sought after for advanced electronic applications. In this study, we developed a robust, flexible, and multifunctional multi-layered gradient system using a two-step fabrication process, which includes compound solution mixing followed by hot press molding. The system consists of alternating magnetic layers (carbonized metal-organic framework (CMOF)/styrene butadiene rubber (SBR)) and conductive layers (carbon nanotube (CNT)/SBR). The resulting CNT-reinforced gradient nanocomposite exhibits impressive mechanical properties, with an elongation at break reaching up to 120 % and ultimate stress up to 13 MPa. Leveraging an absorption-reflection-reabsorption mechanism, the multi-layered gradient nanocomposite achieved an absorption rate of up to 57 % and an EMI shielding effectiveness (EMI SE) of 50 dB at a thickness of just 1 mm. Notably, the flexible structure maintains its performance after 500 cycles of bending and twisting, with only minimal reduction in EMI SE, retaining values of 47 dB and 46 dB, respectively. Furthermore, the composite demonstrates efficient electro-thermal conversion, achieving a steady-state temperature of 152 °C under a driving voltage of 10V. In short, this study presents an innovative approach to designing absorption-dominant, high-performance EMI shielding structures that combine mechanical robustness, and Joule heating capabilities, positioning it as a promising candidate for next-generation advanced electronic devices and energy conversion systems.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120180"},"PeriodicalIF":10.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Fabrication of silver-based metal-organic framework/graphene oxide composites hydrogels with anti-fouling and self-healing performance

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-28 DOI: 10.1016/j.carbon.2025.120177

Bin Liu , Peng Wang , Mingjun Zou , Yikun Ji , Lei Dong , Shujuan Liu , Qian Ye , Feng Zhou

Nanocomposite antifouling coatings have garnered significant attention in marine antifouling technology, primarily due to the integration of anti-fouling additives within antifouling coatings. In this study, silver-based metal azole framework (Ag-2MI) was successfully loaded onto graphene oxide (GO) surface via electrostatic interaction to obtain Ag-2MI/GO nanocomposites, which was used as a filler for hydrogels to obtain the nanocomposite hydrogels (Ag-2MI/GO/hydrogel). The resulting Ag-2MI/GO based hydrogels demonstrated improved mechanical properties and swelling resistance compared to the original hydrogels. Remarkably, the composite exhibited excellent photothermal conversion ability, enabling self-healing capability under near-infrared (NIR) irradiation. This self-healing capability helped to prevent mechanical degradation of the coatings. Furthermore, the Ag-2MI/GO/hydrogel coatings exhibit excellent inhibition of microbial adhesion through a combination of photothermal effect and the slow release of Ag⁺ and 2MI, achieving over 91 % of bacteria elimination and a 98 % reduction in microalgae attachment.

{"title":"Fabrication of silver-based metal-organic framework/graphene oxide composites hydrogels with anti-fouling and self-healing performance","authors":"Bin Liu , Peng Wang , Mingjun Zou , Yikun Ji , Lei Dong , Shujuan Liu , Qian Ye , Feng Zhou","doi":"10.1016/j.carbon.2025.120177","DOIUrl":"10.1016/j.carbon.2025.120177","url":null,"abstract":"<div><div>Nanocomposite antifouling coatings have garnered significant attention in marine antifouling technology, primarily due to the integration of anti-fouling additives within antifouling coatings. In this study, silver-based metal azole framework (Ag-2MI) was successfully loaded onto graphene oxide (GO) surface via electrostatic interaction to obtain Ag-2MI/GO nanocomposites, which was used as a filler for hydrogels to obtain the nanocomposite hydrogels (Ag-2MI/GO/hydrogel). The resulting Ag-2MI/GO based hydrogels demonstrated improved mechanical properties and swelling resistance compared to the original hydrogels. Remarkably, the composite exhibited excellent photothermal conversion ability, enabling self-healing capability under near-infrared (NIR) irradiation. This self-healing capability helped to prevent mechanical degradation of the coatings. Furthermore, the Ag-2MI/GO/hydrogel coatings exhibit excellent inhibition of microbial adhesion through a combination of photothermal effect and the slow release of Ag<sup>+</sup> and 2MI, achieving over 91 % of bacteria elimination and a 98 % reduction in microalgae attachment.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120177"},"PeriodicalIF":10.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transformations of C60 fullerite in the regions of stability and instability of diamond on the carbon phase diagram in the pressure range of 20–160 GPa and temperatures of 300–2300 K

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-27 DOI: 10.1016/j.carbon.2025.120165

Danila Ovsyannikov , Fedor Khorobrykh , Kamil Bulatov , Boris Kulnitskiy , Vladlen Zhukov , Pavel Sorokin , Sergei Klimin , Mikhail Popov

The transformation features of C₆₀ fullerite have been studied in three regions of the recently updated carbon phase diagram at temperatures reaching 2300 K and pressures of 20–25 GPa (within the diamond stability region), 70 GPa (within the diamond instability region), and 160 GPa (also within the diamond stability region). The effect of resonant Raman scattering is observed in fullerite samples after treatment with a pressure of 20–25 GPa, depending on the synthesis temperature. When fullerite is heated under a pressure of 20–25 GPa, partial diamond formation is observed. An increase in pressure up to 160 GPa and heating to 2300 K does not result in the formation of diamond from fullerite, although at pressures above 115 GPa graphite is transformed into diamond. The observed effect can be explained by the fact that a denser structure than diamond is formed from fullerite at a pressure above 30 GPa. Therefore, the issue of the stability of the carbon phase at pressures exceeding 115 GPa remains a topic for further investigation.

{"title":"Transformations of C60 fullerite in the regions of stability and instability of diamond on the carbon phase diagram in the pressure range of 20–160 GPa and temperatures of 300–2300 K","authors":"Danila Ovsyannikov , Fedor Khorobrykh , Kamil Bulatov , Boris Kulnitskiy , Vladlen Zhukov , Pavel Sorokin , Sergei Klimin , Mikhail Popov","doi":"10.1016/j.carbon.2025.120165","DOIUrl":"10.1016/j.carbon.2025.120165","url":null,"abstract":"<div><div>The transformation features of C<sub>60</sub> fullerite have been studied in three regions of the recently updated carbon phase diagram at temperatures reaching 2300 K and pressures of 20–25 GPa (within the diamond stability region), 70 GPa (within the diamond instability region), and 160 GPa (also within the diamond stability region). The effect of resonant Raman scattering is observed in fullerite samples after treatment with a pressure of 20–25 GPa, depending on the synthesis temperature. When fullerite is heated under a pressure of 20–25 GPa, partial diamond formation is observed. An increase in pressure up to 160 GPa and heating to 2300 K does not result in the formation of diamond from fullerite, although at pressures above 115 GPa graphite is transformed into diamond. The observed effect can be explained by the fact that a denser structure than diamond is formed from fullerite at a pressure above 30 GPa. Therefore, the issue of the stability of the carbon phase at pressures exceeding 115 GPa remains a topic for further investigation.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120165"},"PeriodicalIF":10.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced electromagnetic wave absorption of multicore Fe4N@N-doped porous carbon core-shell microspheres through dielectric-magnetic coordination 通过介电磁性配位增强多核 Fe4N@N 掺杂多孔碳核壳微球的电磁波吸收能力

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-27 DOI: 10.1016/j.carbon.2025.120176

Shuting Zhang , Chengguo Wang , Xiangwei Meng , Siyu Liu , Xiaoyu Li , Zhiqiang Yao , Meijie Yu

With the vigorous development of nanotechnology, precise control of composition and structure in carbon-coated magnetic core-shell materials for efficient electromagnetic wave absorption is an attractive research direction. In this work, multi-core Fe₄N@N-doped porous carbon core-shell microspheres (p-FCNS) were successfully synthesized using a controllable method to achieve excellent electromagnetic wave absorption performance at a thin matching thickness. p-FCNS offered multiple advantages due to the transformation of the Fe₄N phase and porous carbon matrix: (I) excellent magnetic loss and charge conduction ability; (II) optimized impedance matching; and (III) enhanced interfacial polarization and other attenuation mechanisms. Through the synergistic effect of magnetic-dielectric loss, p-FCNS realized a minimum reflection loss of −57.61 dB (at 1.74 mm) and an optimal absorption bandwidth of 5.27 GHz (at 1.68 mm). Therefore, this work substantiated the significant potential of Fe₄N@porous carbon composites for the application of electromagnetic wave absorption, and provided novel insights into the composition and structure control of high-performance electromagnetic wave absorption materials.

{"title":"Enhanced electromagnetic wave absorption of multicore Fe4N@N-doped porous carbon core-shell microspheres through dielectric-magnetic coordination","authors":"Shuting Zhang , Chengguo Wang , Xiangwei Meng , Siyu Liu , Xiaoyu Li , Zhiqiang Yao , Meijie Yu","doi":"10.1016/j.carbon.2025.120176","DOIUrl":"10.1016/j.carbon.2025.120176","url":null,"abstract":"<div><div>With the vigorous development of nanotechnology, precise control of composition and structure in carbon-coated magnetic core-shell materials for efficient electromagnetic wave absorption is an attractive research direction. In this work, multi-core Fe<sub>4</sub>N@N-doped porous carbon core-shell microspheres (<em>p</em>-FCNS) were successfully synthesized using a controllable method to achieve excellent electromagnetic wave absorption performance at a thin matching thickness. <em>p</em>-FCNS offered multiple advantages due to the transformation of the Fe<sub>4</sub>N phase and porous carbon matrix: (I) excellent magnetic loss and charge conduction ability; (II) optimized impedance matching; and (III) enhanced interfacial polarization and other attenuation mechanisms. Through the synergistic effect of magnetic-dielectric loss, <em>p</em>-FCNS realized a minimum reflection loss of −57.61 dB (at 1.74 mm) and an optimal absorption bandwidth of 5.27 GHz (at 1.68 mm). Therefore, this work substantiated the significant potential of Fe<sub>4</sub>N@porous carbon composites for the application of electromagnetic wave absorption, and provided novel insights into the composition and structure control of high-performance electromagnetic wave absorption materials.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"237 ","pages":"Article 120176"},"PeriodicalIF":10.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Urchin -shaped NiO/Ni particles with a heterojunction deposited on porous carbon via electroplating and low-temperature heat treatment for efficient microwave absorption 通过电镀和低温热处理在多孔碳上沉积具有异质结的海胆状氧化镍/镍颗粒，实现高效微波吸收

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-27 DOI: 10.1016/j.carbon.2025.120157

Tong Shi , Xueting Li , Xianming Chen , Meng Rao , Yu Wang , Dongya Huang , Qinyuan Li , Hong Zeng , John Wang , Yuangming Chen

The incorporation of magnetic metals into carbon-based materials provides an effective approach to address the impedance matching imbalance inherent in pure carbon-based wave-absorbing materials. However, the challenge was found in developing simple and efficient methods to fabricate carbon-based composites. Herein, Ni particles with an urchin-like morphology to effectively attenuate electromagnetic waves were loaded on porous carbon derived from canola straw (hereafter referred to as CCS) via electroplating. Thereafter, urchin-shaped NiO/Ni particles with heterojunctions on the CCS (NiO/Ni@CCS) were constructed by a brief low-temperature heat treatment. Experimental and simulation results indicated that the heterogeneous interface caused interface charge redistribution, thereby enhancing conductive and dielectric losses. NiO/Ni@CCS performed an excellent microwave absorbability with a minimum reflection loss of −52.09 dB and a wider efficient absorption bandwidth of 5.1 GHz. The radar cross-section (RCS) simulation further confirmed that NiO/Ni@CCS exhibited superior microwave attenuation capability with an RCS reduction of 29.16 dB m². Moreover, NiO/Ni@CCS composite showed excellent corrosion resistance with a corrosion potential of −0.074 V for potential application in complex environments.

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引用次数: 0

Flat-band driven ordered magnetism in sp3 supermodulated defected fluorinated graphene

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-27 DOI: 10.1016/j.carbon.2025.120131

Wei-Jian Li , Shui-Lin Li , Gan Liu , Xiao-Xiang Xi , Jia-Wei Liu , Da-Fei Sun , Yuan Zhou , Nu-Jiang Tang

Strong correlation drives a variety of exotic quantum phases, and thus has been a vital topic in modern condensed matter physics. One of the recent advances is the strong correlations in flat-band systems. Here, by introducing the supermodulations of sp

^{3}

fluorinated islands around divacancy, a new strategy to enhance the correlations of the

π

electrons in defected graphene, beyond the moiré patterns, is proposed. Ab-initio calculations reveal that the systems host nearly flat band, and the flatness of the band near the Fermi level is substantially strengthened, being comparable to that in small angle twisted bilayer graphene. Interestingly, the topography of the effective model can be tuned by properly removing the fluorine atoms in the island. Consequently, the long-range ordered magnetic ground states appear in the designed structures as theoretically predicted and experimentally observed, confirming the validity of this new supermodulation. We show that the origin of magnetism is from the fluorine decorated to the defected graphene, and the periodic network among the

π

electrons of carbon is responsible for the magnetic long range ordering in the fluorinated reduced graphene. This work provides a feasible and simple platform to study the interaction induced phenomena in defected graphene. Moreover, the much reduced supercell size, in comparison with the moiré materials, may support higher Curie temperature, opening an avenue for future high-temperature spintronics applications in graphene-based materials.

{"title":"Flat-band driven ordered magnetism in sp3 supermodulated defected fluorinated graphene","authors":"Wei-Jian Li , Shui-Lin Li , Gan Liu , Xiao-Xiang Xi , Jia-Wei Liu , Da-Fei Sun , Yuan Zhou , Nu-Jiang Tang","doi":"10.1016/j.carbon.2025.120131","DOIUrl":"10.1016/j.carbon.2025.120131","url":null,"abstract":"<div><div>Strong correlation drives a variety of exotic quantum phases, and thus has been a vital topic in modern condensed matter physics. One of the recent advances is the strong correlations in flat-band systems. Here, by introducing the supermodulations of <em>sp</em><span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span> fluorinated islands around divacancy, a new strategy to enhance the correlations of the <span><math><mi>π</mi></math></span> electrons in defected graphene, beyond the moiré patterns, is proposed. <em>Ab-initio</em> calculations reveal that the systems host nearly flat band, and the flatness of the band near the Fermi level is substantially strengthened, being comparable to that in small angle twisted bilayer graphene. Interestingly, the topography of the effective model can be tuned by properly removing the fluorine atoms in the island. Consequently, the long-range ordered magnetic ground states appear in the designed structures as theoretically predicted and experimentally observed, confirming the validity of this new supermodulation. We show that the origin of magnetism is from the fluorine decorated to the defected graphene, and the periodic network among the <span><math><mi>π</mi></math></span> electrons of carbon is responsible for the magnetic long range ordering in the fluorinated reduced graphene. This work provides a feasible and simple platform to study the interaction induced phenomena in defected graphene. Moreover, the much reduced supercell size, in comparison with the moiré materials, may support higher Curie temperature, opening an avenue for future high-temperature spintronics applications in graphene-based materials.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"237 ","pages":"Article 120131"},"PeriodicalIF":10.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and modulation of naphthalene oligomers catalyzed by chloroaluminate ionic liquids for advanced mesophase pitch production

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-27 DOI: 10.1016/j.carbon.2025.120163

Meng-meng Xu, Qi-guang Huang, Tian-li Hui, Tao Zheng, Hai-yan Liu, Rui Zhang, Xiang-hai Meng, Zhi-chang Liu

Mesophase pitch is a crucial compound platform for the production of various advanced carbon materials, with its quality significantly influenced by the composition and structure of precursor materials. Here, we present a novel method for preparing naphthalene oligomers (NOs), which serve as precursors for the preparation of mesophase pitch (MP) via naphthalene polymerization catalyzed by chloroaluminate ionic liquids (Al-ILs). Different from those obtained via AlCl₃-catalyzed method, the NOs synthesized by Al-ILs possess a narrow molecular weight distribution (MWD, 200–600 Da) and a well-defined molecular composition (di-, tri-, and tetra-polymers of naphthalene). When the prepared NOs were used as precursors, the resulting MP exhibited a shorter polycondensation time (4 h), higher yield (68%), lower ash content (0.005%), more concentrated MWD, and easier carbonization. These improvements are attributed to the tunable structure and acidity of Al-ILs, which facilitate naphthalene polymerization at low reaction temperatures and appropriate acidity, thereby improving its controllability. This work provides a flexible and efficient pathway for the custom production of NOs that potentially enable broader industrial applications of MP.

{"title":"Preparation and modulation of naphthalene oligomers catalyzed by chloroaluminate ionic liquids for advanced mesophase pitch production","authors":"Meng-meng Xu, Qi-guang Huang, Tian-li Hui, Tao Zheng, Hai-yan Liu, Rui Zhang, Xiang-hai Meng, Zhi-chang Liu","doi":"10.1016/j.carbon.2025.120163","DOIUrl":"10.1016/j.carbon.2025.120163","url":null,"abstract":"<div><div>Mesophase pitch is a crucial compound platform for the production of various advanced carbon materials, with its quality significantly influenced by the composition and structure of precursor materials. Here, we present a novel method for preparing naphthalene oligomers (NOs), which serve as precursors for the preparation of mesophase pitch (MP) via naphthalene polymerization catalyzed by chloroaluminate ionic liquids (Al-ILs). Different from those obtained via AlCl<sub>3</sub>-catalyzed method, the NOs synthesized by Al-ILs possess a narrow molecular weight distribution (MWD, 200–600 Da) and a well-defined molecular composition (di-, tri-, and tetra-polymers of naphthalene). When the prepared NOs were used as precursors, the resulting MP exhibited a shorter polycondensation time (4 h), higher yield (68%), lower ash content (0.005%), more concentrated MWD, and easier carbonization. These improvements are attributed to the tunable structure and acidity of Al-ILs, which facilitate naphthalene polymerization at low reaction temperatures and appropriate acidity, thereby improving its controllability. This work provides a flexible and efficient pathway for the custom production of NOs that potentially enable broader industrial applications of MP.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120163"},"PeriodicalIF":10.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemical adsorption-induced distinct friction behaviors of supported atomically thin nanofilm

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-26 DOI: 10.1016/j.carbon.2025.120164

Chaochen Xu , Zhijiang Ye , Simeng Hua , Philip Egberts

Graphene, with its excellent mechanical properties and friction-reducing capabilities, functions as a solid lubricant and protective coating. However, environmental contamination, consisting of various compounds, elements, and molecules, can degrade these properties and is challenging to characterize. We address this difficulty to unravel the impact of contamination on graphene's tribological performance by adsorbing six different chemical reagents on graphene supported by silicon substrates. Through friction experiments, six distinct frictional behaviors were observed on these contaminated graphene samples. Specifically, benzyl alcohol, toluene, and ethanol all increased the surface friction, adhesion, and friction coefficient of graphene to varying degrees, resulting in positive frictional hysteresis. In contrast, acetone, 1-pentanol, and 1-pentane had the opposite effect to different extents. Notably, 1-pentane significantly reduced the friction coefficient of graphene, achieving superlubricity, while benzyl alcohol damaged thin layers of graphene, causing them to completely disappear. Finally, through MD simulations, we demonstrated that hydrogen bonds formed by hydroxyl groups and the carbon chain structure of the chemical contaminants cause variations in the contact area and stress/strain distribution within it, thus leading to varied surface friction. The evolution of these factors during the loading-unloading process was the primary reason behind these six distinct hysteretic friction behaviors.

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引用次数: 0

Pd-enhanced carbon catalyst for efficient ozone removal via tuning carbon electronic properties

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-26 DOI: 10.1016/j.carbon.2025.120162

Weiyang Xue , Bin Gu , Yukun Jiang , Kai Deng , Wenhao Cui , Jingmei Li , Chenglin Sun , Xiangdong Zhang

Efficient ozone removal under humid conditions remains a significant challenge due to the strong adsorption of water molecules on active sites, which hinders catalytic activity. Herein, we developed a Pd-enhanced carbon catalyst (N900PdSC) through a adsorption self-reduction and heating induced relocation method to tune the active carbon property and facilitate the electron transfer between carbon and Pd. The catalyst demonstrated remarkable ozone decomposition efficiency, on which 99.5 % of ozone removal efficiency was initially achieved, and 97.3 % of removal efficiency was still retained after 6 h at 55 % RH at bench experiments. Characterization and theoretical analyses revealed electron transfer from palladium to carbon, which enhanced carbon materials catalytic ozone removal performance. Water contact angle and sliding angle tests confirmed N900PdSC superior water resistance, reducing the competitive adsorption of water molecules. Additionally, scale-up tests demonstrated a 99.8 % ozone removal efficiency at 55 % RH with no significant deactivation observed over 100 h. The study highlights the potential of Pd-enhanced carbon materials for high-performance ozone removal, emphasizing the importance of tuning the electronic property of carbon through metal modification to overcome water resistance and enhance catalytic activity. This work gives a new pathway for the design of stable and efficient ozone-removal catalysts for practical applications in high-humidity environments.

{"title":"Pd-enhanced carbon catalyst for efficient ozone removal via tuning carbon electronic properties","authors":"Weiyang Xue , Bin Gu , Yukun Jiang , Kai Deng , Wenhao Cui , Jingmei Li , Chenglin Sun , Xiangdong Zhang","doi":"10.1016/j.carbon.2025.120162","DOIUrl":"10.1016/j.carbon.2025.120162","url":null,"abstract":"<div><div>Efficient ozone removal under humid conditions remains a significant challenge due to the strong adsorption of water molecules on active sites, which hinders catalytic activity. Herein, we developed a Pd-enhanced carbon catalyst (N900PdSC) through a adsorption self-reduction and heating induced relocation method to tune the active carbon property and facilitate the electron transfer between carbon and Pd. The catalyst demonstrated remarkable ozone decomposition efficiency, on which 99.5 % of ozone removal efficiency was initially achieved, and 97.3 % of removal efficiency was still retained after 6 h at 55 % RH at bench experiments. Characterization and theoretical analyses revealed electron transfer from palladium to carbon, which enhanced carbon materials catalytic ozone removal performance. Water contact angle and sliding angle tests confirmed N900PdSC superior water resistance, reducing the competitive adsorption of water molecules. Additionally, scale-up tests demonstrated a 99.8 % ozone removal efficiency at 55 % RH with no significant deactivation observed over 100 h. The study highlights the potential of Pd-enhanced carbon materials for high-performance ozone removal, emphasizing the importance of tuning the electronic property of carbon through metal modification to overcome water resistance and enhance catalytic activity. This work gives a new pathway for the design of stable and efficient ozone-removal catalysts for practical applications in high-humidity environments.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"238 ","pages":"Article 120162"},"PeriodicalIF":10.5,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0