Carbon Letters最新文献_第5页

White-light emitting self-assembled graphene quantum dots from coal soot 从煤烟中发出白光的自组装石墨烯量子点

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-18 DOI: 10.1007/s42823-025-00860-3

Shiv Rag Mishra, Tuhin Mandal, Rabi Narayan Senapati, Vikram Singh

{"title":"White-light emitting self-assembled graphene quantum dots from coal soot","authors":"Shiv Rag Mishra, Tuhin Mandal, Rabi Narayan Senapati, Vikram Singh","doi":"10.1007/s42823-025-00860-3","DOIUrl":"10.1007/s42823-025-00860-3","url":null,"abstract":"<div><p>Graphene quantum dots have recently gained significant attention for their potential application in the development of optoelectronic materials. The present study focused on the ultrasonic method to synthesize white-light-emitting graphene quantum dots from coal soot in just 2 min at room temperature. The white-light emission was achieved in solution and polymeric film with good Commission Internationale del’Eclairage index (0.28, 0.33) and (0.25, 0.30), respectively. The graphene quantum dots cover a significant fraction of the visible region in the emission spectrum with two prominent bands at 475 and 635 nm at 380 nm photoexcitation, corresponding to monomer and J-aggregate emission. The strong reducing and basic nature of the ethylene diamine facilitated the preparation of self-assembled J-aggregate graphene quantum dots through hydrogen bonding and electrostatic interaction. The mechanism of origin J-aggregate emission in the prepared graphene quantum dots was studied using UV–visible absorption, steady-state, lifetime fluorescence spectroscopy, and zeta potential. The as-synthesized graphene quantum dots are successfully coated on the UV-LEDs' surface and emit white light on the applied voltage. The colours of red, green, blue, and yellow balls appear significantly in the lighting of prepared white LEDs.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1067 - 1079"},"PeriodicalIF":5.5,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Nuclear reactor graphite under irradiation: insights on microstructural degradation and deformation mechanisms from advanced transmission electron microscopy analysis 辐照下的核反应堆石墨：从先进的透射电子显微镜分析中对微观结构退化和变形机制的见解

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-18 DOI: 10.1007/s42823-024-00844-9

Ram Krishna, Dinesh Kumar Madheswaran, Paul M. Mummery

{"title":"Nuclear reactor graphite under irradiation: insights on microstructural degradation and deformation mechanisms from advanced transmission electron microscopy analysis","authors":"Ram Krishna, Dinesh Kumar Madheswaran, Paul M. Mummery","doi":"10.1007/s42823-024-00844-9","DOIUrl":"10.1007/s42823-024-00844-9","url":null,"abstract":"<div><p>Graphite cores in nuclear reactors are critical components subjected to severe irradiation conditions. Despite the known susceptibility of graphite to radiation-induced damage, detailed microstructural analyses are limited. Existing works of literature have identified changes in crystallite morphology and orientation as early indicators of structural degradation, but the precise micro-mechanisms are not fully understood. This research explicates these micro-mechanisms using advanced analytical transmission electron microscopy (TEM) to examine irradiated graphite at doses up to 1 dpa (displacements per atom). TEM imaging and diffraction analysis captured detailed changes in crystallite structure. Even at low radiation doses (~ 0.1 dpa), a 15% alteration in crystallite morphology and orientation was observed. Significant crystal lattice rotations up to 5 degrees and micro-deformations were also detected. Additionally, the formation of micro-kinks and kink bands, ranging from 50 to 200 nm, were identified as potential deformation processes, consistent with phenomena in other layered materials. These results advance our understanding of the micro-mechanisms driving structural degradation and deformation in irradiated graphite. This research has significant implications for developing improved models and strategies to enhance the performance and longevity of graphite cores in nuclear reactors, contributing to the advancement of nuclear energy technology.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1081 - 1096"},"PeriodicalIF":5.5,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Iodine-free carbon cathodes for aqueous zinc–iodine batteries with supercapacitor-level rate performance 具有超级电容器级倍率性能的水相锌碘电池用无碘碳阴极

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-17 DOI: 10.1007/s42823-024-00836-9

Xiangyu Kong, Xinyang Zhang, Jie Zhang, Dewei Wang

{"title":"Iodine-free carbon cathodes for aqueous zinc–iodine batteries with supercapacitor-level rate performance","authors":"Xiangyu Kong, Xinyang Zhang, Jie Zhang, Dewei Wang","doi":"10.1007/s42823-024-00836-9","DOIUrl":"10.1007/s42823-024-00836-9","url":null,"abstract":"<div><p>Aqueous zinc–iodine batteries (AZIBs) are gaining attention for their ability to store and convert electrical energy. Nevertheless, their performance is hindered by the continual migration of polyiodides towards the zinc anodes, leading to undesirable side reactions, diminished coulombic efficiency, and compromised cycling stability. Traditional carbon materials have proven inadequate in resolving these challenges, mainly due to their limited iodine capacity and weak binding forces. Herein, we explore the use of porous carbon nanosheets (PCNSs) synthesized via the “Pharaoh’s Serpent” reaction as cathode electrodes in AZIBs without pre-load iodine. The PCNSs, characterized by their nanosheet structure and expansive specific surface area, not only facilitate a shorter diffusion path for rapid electrolyte infiltration but also provide numerous sites for ion adsorption and capacitive storage, markedly improving the efficacy of electrochemical reactions and ion migration rates. Utilizing the synthesized PCNSs as the cathode electrode in AZIBs, a specific capacity of 296 mAh g<sup>−1</sup> was achieved at 0.3 A g<sup>−1</sup>. Even when the current density increased to 30 A g<sup>−1</sup>, a specific capacity of 144 mAh g<sup>−1</sup> was still attained, with a capacity retention ratio of up to 48.6%, which is competitive with that of supercapacitors. In addition, the AZIBs demonstrated impressive cycling stability, retaining 103% of their capacity after 10,000 cycles, and a notable energy density of 266.4 Wh kg<sup>−1</sup> based on the cathode material. These findings significantly broaden the application of carbon materials in AZIBs research, emphasizing their potential in advancing AZIB technology.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"849 - 860"},"PeriodicalIF":5.5,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

High-performance symmetrical supercapacitor based on coal-derived porous carbon materials prepared via pyrolysis and KOH activation 煤基多孔碳材料热解KOH活化制备的高性能对称超级电容器

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-17 DOI: 10.1007/s42823-025-00857-y

Fuyang Ren, Hongze Zhu, Haoran Pan, Lu Tian, Tao Wang, Jianglong Yu, Jinxiao Dou, Dongling Wu, Xingxing Chen

{"title":"High-performance symmetrical supercapacitor based on coal-derived porous carbon materials prepared via pyrolysis and KOH activation","authors":"Fuyang Ren, Hongze Zhu, Haoran Pan, Lu Tian, Tao Wang, Jianglong Yu, Jinxiao Dou, Dongling Wu, Xingxing Chen","doi":"10.1007/s42823-025-00857-y","DOIUrl":"10.1007/s42823-025-00857-y","url":null,"abstract":"<div><p>The high value-added utilization of traditional coal resources is one of the important ways to achieve the strategic goals of carbon peaking and carbon neutrality. Simultaneously, coal-based carbon materials, noted for their cost-effectiveness, superior conductivity, and inherent stability, are emerging as promising candidates for next-generation capacitor technologies. This research presents a series of coal-derived porous carbon by pyrolysis using low rank lignite as raw material and KOH as activator, which are employed in symmetrical supercapacitors filled with liquid electrolytes. The physicochemical properties of the as-prepared electrode materials are characterized by means of scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and their supercapacitive performance are evaluated through cyclic voltammetry and galvanostatic charge–discharge tests. The coal-based porous carbon electrode prepared at an activation temperature of 800 °C (KOH-800) exhibits a specific capacitance of 142.2 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup>, and retaining 80% of its capacitance (114.0 F g<sup>−1</sup>) even at 10 A g<sup>−1</sup>. The fabricated liquid supercapacitor displays a power density of 999.8 W kg<sup>−1</sup> and an energy density of 19.4 Wh kg<sup>−1</sup> at a current density of 1 A g<sup>−1</sup>. Undergoing 10,000 cycles at 2 A g<sup>−1</sup>, the supercapacitor maintains near-perfect capacitance retention and coulombic efficiency close to 100%, demonstrating its excellent durability and stability for supercapacitor applications.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1055 - 1066"},"PeriodicalIF":5.5,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Fuel-driven design of NiOx/AlOx catalysts for methane decomposition through tuning of metal-support interaction 通过调节金属-载体相互作用设计燃料驱动的甲烷分解NiOx/AlOx催化剂

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-17 DOI: 10.1007/s42823-024-00856-5

Nodira Urol Kizi Saidova, So Yeong Yang, Jae Hoon Kim, Shaikh Shayan Siddiqui, Soo Hong Lee, Ji Sun Im

{"title":"Fuel-driven design of NiOx/AlOx catalysts for methane decomposition through tuning of metal-support interaction","authors":"Nodira Urol Kizi Saidova, So Yeong Yang, Jae Hoon Kim, Shaikh Shayan Siddiqui, Soo Hong Lee, Ji Sun Im","doi":"10.1007/s42823-024-00856-5","DOIUrl":"10.1007/s42823-024-00856-5","url":null,"abstract":"<div><p>As the demand for sustainable hydrogen (H₂) production grows, catalytic decomposition of methane (CDM) has emerged as a CO<sub>2</sub>-free pathway for H<sub>2</sub> generation, producing valuable multi-walled carbon nanotubes (MWCNTs) as byproducts. This study examines the role of fuel type in shaping the properties and performance of NiOx/AlOx catalysts synthesized via solution combustion synthesis (SCS). Catalysts prepared with citric acid, urea, hexamethylenetetramine (HMTA), and glycine exhibited varying NiO nanoparticle (NP) sizes and dispersions. Among them, the HMTA catalyst achieved the highest Ni dispersion (~ 3.2%) and specific surface area (21.6 m<sup>2</sup>/g<sub>cat</sub>), attributed to vigorous combustion facilitated by its high pH and amino-group-based fuel. Catalytic tests showed comparable activation energy (55.7–59.7 kJ/mol) across all catalysts, indicating similar active site formation mechanisms. However, the HMTA catalyst demonstrated superior CH<sub>4</sub> conversion (~ 68%) and stability, maintaining performance for over 160 min under undiluted CH₄, while others deactivated rapidly. MWCNT characterization revealed consistent structural properties, such as graphitization degree and electrical conductivity, across all catalysts, emphasizing that fuel type influenced stability rather than MWCNT quality. H<sub>2</sub> temperature-programmed reduction (H<sub>2</sub>-TPR) analysis identified moderate metal-support interaction (MSI) in the HMTA catalyst as a key factor for optimizing stability and active site utilization. These findings underscore the importance of fuel selection in SCS to control MSIs and dispersion, offering a strategy to enhance catalytic performance in CDM and other thermocatalytic applications.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1045 - 1054"},"PeriodicalIF":5.5,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Effect of hydrogenated tail oil on liquid phase carbonization performance of medium- and low-temperature coal tar pitch 氢化尾油对中低温煤焦油沥青液相碳化性能的影响

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-16 DOI: 10.1007/s42823-024-00849-4

Jiaojiao Liu, Siying Xin, Shiquan He, Sijie Wang, Ting He, Zhe Jin, Louwei Cui, Chongpeng Du, Yi Wang, Yonghong Zhu, Dong Li

{"title":"Effect of hydrogenated tail oil on liquid phase carbonization performance of medium- and low-temperature coal tar pitch","authors":"Jiaojiao Liu, Siying Xin, Shiquan He, Sijie Wang, Ting He, Zhe Jin, Louwei Cui, Chongpeng Du, Yi Wang, Yonghong Zhu, Dong Li","doi":"10.1007/s42823-024-00849-4","DOIUrl":"10.1007/s42823-024-00849-4","url":null,"abstract":"<div><p>Coal pitch mainly consists of aromatic hydrocarbons, phenolic substances, and aliphatic hydrocarbons, the macromolecular structures formed by these cyclic and chain hydrocarbons through chemical bonding possess diversity and complexity. In this study, medium- and low-temperature coal tar pitch (LCTP) served as the primary material for the production of mesophase pitch via co-carbonization with hydrogenated tail oil (HTO). Aimed to clarify the effects of different amounts of HTO addition and analyze the mechanism of introducing naphthenic and aromatic hydrocarbons on the liquid phase carbonization process. When HTO additive amount is 30%, the carbonized product with the largest content of mature graphite crystals at 25.01%, and the smallest degree of defects. The analytical mechanism demonstrates that the condensation of naphthenic hydrocarbons introduced by HTO produces hydrogen radicals, the hydrogen transfer reaction saturates a significant quantity of free radicals generated within the system, thereby impeding further rapid condensation and curing, and decreasing the viscosity of the system. On the other hand, the aromatic hydrocarbons introduced undergo dehydrogenation and condensation to produce additional polycyclic aromatic hydrocarbons, thereby contributing to a more abundant carbon structure conducive to the development of mesophase pitch. The combined effect of aromatic hydrocarbons and naphthenic hydrocarbons facilitates the slow development of the mesophase structure into a broad-area optical structure. This study provides an effective method for improving the performance of coal-based mesophase pitch, which reduces the production cost and promotes the clean and high value-added utilization of limited resources.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1027 - 1043"},"PeriodicalIF":5.5,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Effect of molecular weight of aliphatic dicarboxylic acids polyester on properties of the waterborne polyurethane sizing agent 脂族二羧酸聚酯分子量对水性聚氨酯施胶剂性能的影响

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-14 DOI: 10.1007/s42823-024-00850-x

Shuoyao Song, Yuxuan Xing, Dongliang Wu, Xuhao Qin, Xiaodong Liu, Chuanxiu Hu, Manman Kong, Lei Liu, Ruliang Zhang

引用次数: 0

The detection of toxic gases (CO, FN3, HI, N2, CH4, N2O, and O3) using a wearable Kapton–graphene biosensor for environmental and biomedical applications 用于环境和生物医学应用的可穿戴卡顿-石墨烯生物传感器检测有毒气体（CO, FN3， HI, N2, CH4， N2O和O3）

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-12-17 DOI: 10.1007/s42823-024-00834-x

Marzieh Ramezani Farani, Hanseung Kim, Munirah Alhammadi, Yun Suk Huh

{"title":"The detection of toxic gases (CO, FN3, HI, N2, CH4, N2O, and O3) using a wearable Kapton–graphene biosensor for environmental and biomedical applications","authors":"Marzieh Ramezani Farani, Hanseung Kim, Munirah Alhammadi, Yun Suk Huh","doi":"10.1007/s42823-024-00834-x","DOIUrl":"10.1007/s42823-024-00834-x","url":null,"abstract":"<div><p>Toxic gas emissions are a critical global health concern, responsible for numerous deaths each year. These hazardous gases can cause severe physiological reactions and even death upon exposure. To address this issue, we propose a graphene-Kapton-based flexible biosensor for non-invasive toxic gas detection. The sensor is designed to accurately detect and identify several harmful gases, including carbon monoxide (CO), fluorine azide (FN<sub>3</sub>), hydrogen iodide (HI), nitrogen (N<sub>2</sub>), methane (CH<sub>4</sub>), nitrous oxide (N<sub>2</sub>O), and ozone (O<sub>3</sub>). Utilizing the Computer Simulation Technology (CST) Studio Suite 2024, we simulate the detection process, focusing on advanced techniques and miniature flexible structures. The sensor’s active element is a graphene patch embedded within a polyimide (Kapton) film, which allows for precise determination of the RF planar resonant structure<i>’</i>s frequency response. The graphene–Kapton biosensor is shown to have remarkable detection performance, as demonstrated by the results of the simulation, with a diffusivity of <span>({9.09e}^{-08}[{m}^{2}/S])</span>, an accuracy of <span>({6.62e}^{-13})</span>, and a power loss of <span>(1.5 mW)</span>. These findings highlight the sensor<i>’</i>s potential as an effective tool for detecting and identifying toxic gases with high precision and efficiency.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"839 - 848"},"PeriodicalIF":5.5,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Advancing building management with nano-enhanced carbon materials: a machine learning-driven business and economic analysis 用纳米增强碳材料推进建筑管理：机器学习驱动的商业和经济分析

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-12-10 DOI: 10.1007/s42823-024-00826-x

Yuan Zhu, Khidhair Jasim Mohammed, Mohamed Gamal Elsehrawy, H. Elhosiny Ali, Hakim AL Garalleh

{"title":"Advancing building management with nano-enhanced carbon materials: a machine learning-driven business and economic analysis","authors":"Yuan Zhu, Khidhair Jasim Mohammed, Mohamed Gamal Elsehrawy, H. Elhosiny Ali, Hakim AL Garalleh","doi":"10.1007/s42823-024-00826-x","DOIUrl":"10.1007/s42823-024-00826-x","url":null,"abstract":"<div><p>Carbon aerogels including graphite and graphene have unique properties such as lightweight, strong, and insulative to roofing applications. Carbon aerogels offer innovative solutions in building management by enhancing thermal and acoustic insulation while reducing structural weight, aligning with the focus on economic and business analysis driven by machine learning. Traditional building materials often fail to meet contemporary energy efficiency and sustainability demands, underscoring the necessity for more advanced solutions. This project is dedicated to integrating carbon aerogels into roofing systems and employs Deep Neural Networks (DNNs) to optimize their performance and integration. The novelty of this study lies in its application of carbon aerogel technology—a cutting-edge, lightweight, and highly insulative material—specifically within roofing to analyze the practical evaluation of carbon aerogels’ thermal properties and economic viability in the construction industry. This study aims to rigorously assess carbon aerogels’ performance and financial impact on roofing applications. By conducting the thermal guard test and economic lifecycle evaluation, the study seeks to validate carbon aerogels’ enhanced energy efficiency and cost-effectiveness compared to traditional roofing materials. The study demonstrates that carbon aerogels offer superior thermal insulation in roofing applications, with a thermal conductivity of 0.02 W/m·K, significantly outperforming traditional materials. Economically, the high initial cost of carbon aerogels is effectively offset by substantial energy savings, estimated at $300 annually per square meter, resulting in a payback period of approximately 1.05 years. These findings are supported by rigorous testing and optimization through DNN, highlighting the material’s potential to enhance energy efficiency and sustainability in building practices.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"781 - 802"},"PeriodicalIF":5.5,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 porosity in marine biomass-derived activated carbon via two-step CO2 activation and acidic decontamination 通过两步CO2活化和酸性去污来增强海洋生物质活性炭的孔隙度

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-12-09 DOI: 10.1007/s42823-024-00833-y

Jueun Choi, Hyeonseok Yi, Toru Kato, Koji Saito, Hiroko Watanabe, Keiko Ideta, Takaaki Shimohara, Jin Miyawaki, Seong-Ho Yoon, Yoong Ahm Kim, Koji Nakabayashi

{"title":"Enhanced porosity in marine biomass-derived activated carbon via two-step CO2 activation and acidic decontamination","authors":"Jueun Choi, Hyeonseok Yi, Toru Kato, Koji Saito, Hiroko Watanabe, Keiko Ideta, Takaaki Shimohara, Jin Miyawaki, Seong-Ho Yoon, Yoong Ahm Kim, Koji Nakabayashi","doi":"10.1007/s42823-024-00833-y","DOIUrl":"10.1007/s42823-024-00833-y","url":null,"abstract":"<div><p>Marine biomass (MB) is gaining attention as a sustainable and eco-friendly carbon source within the carbon cycle, particularly in regions with extensive coastlines. However, the high content of alkali and alkaline earth metals (AAEMs) in MB poses challenges in producing functional carbon materials, like activated carbon (AC), with a high specific surface area (SSA). In this study, we employed a two-step CO<sub>2</sub> activation process, coupled with acid treatment, to successfully convert MB into highly porous AC. Preheating followed by nitric acid washing reduced AAEM content from 22.4 to 2.5 wt%, and subsequent atmospheric CO<sub>2</sub> activation produced AC with an SSA of 1700 m<sup>2</sup>/g and mesopores of 3–5 nm. A further treatment with a mixed acid solution of nitric and acetic acids reduced impurities to below 1.0 wt%. A second pressurized CO<sub>2</sub> activation at 1 MPa yielded AC with an SSA exceeding 2100 m<sup>2</sup>/g, with mesopores accounting for more than 50% of the total pore volume. This method demonstrates an effective approach to producing high-performance AC from MB for advanced applications.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"825 - 837"},"PeriodicalIF":5.5,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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