Carbon Letters最新文献_第4页

A beaded g-C3N4/CoFe2O4 nanofibers for efficient adsorbing and catalytical degrading multiple pollutants g-C3N4/CoFe2O4珠状纳米纤维对多种污染物的高效吸附和催化降解

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-21 DOI: 10.1007/s42823-025-00863-0

Zhi Li, Ru Li, Rui Liu, Wen-Jie Zhang, Yong Wan, Yu-Ze Sun, Lei Yang, Yun-Ze Long

{"title":"A beaded g-C3N4/CoFe2O4 nanofibers for efficient adsorbing and catalytical degrading multiple pollutants","authors":"Zhi Li, Ru Li, Rui Liu, Wen-Jie Zhang, Yong Wan, Yu-Ze Sun, Lei Yang, Yun-Ze Long","doi":"10.1007/s42823-025-00863-0","DOIUrl":"10.1007/s42823-025-00863-0","url":null,"abstract":"<div>In this work, we reported a method for a fabrication of bead-on-string structured g-C3N4/CoFe2O4 composite nanofibers by electrospinning coupled with in situ calcination. For the first time, this catalyst effectively removed high concentrations of mixed organic pollutants through the synergistic effects of adsorption and photocatalysis. The composite materials removal efficiency of adsorption and photocatalytic for high concentrations of organic pollutants in wastewater can exceed 90%. Surface potential analysis using in situ Kelvin probe force microscopy demonstrated the electron transfer pathways on the catalyst surface. The formation of the heterojunction was demonstrated through DFT calculations to significantly enhance the efficiency of electron–hole separation. This work provided valuable insights for the development of efficient catalysts for the synergistic adsorption-photocatalytic treatment of environmental pollutants, thus addressing increasingly severe environmental challenges.</div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1187 - 1203"},"PeriodicalIF":5.5,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084912","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

Synthesis of durian shell-based carbon dots and its application in the detection of ({text{MnO}}_{4}^{ - })and ({text{Cr}}_{{2}} {text{O}}_{7}^{2 - }) 榴莲壳基碳点的合成及其在({text{MnO}}_{4}^{ - })、检测中的应用 ({text{Cr}}_{{2}} {text{O}}_{7}^{2 - })

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-21 DOI: 10.1007/s42823-024-00848-5

Chaoshuai Hu, Yuanxin Liu, Jian Zhang, Yaming Zhu, Xitao Yin, Xuefei Zhao

{"title":"Synthesis of durian shell-based carbon dots and its application in the detection of ({text{MnO}}_{4}^{ - })and ({text{Cr}}_{{2}} {text{O}}_{7}^{2 - })","authors":"Chaoshuai Hu, Yuanxin Liu, Jian Zhang, Yaming Zhu, Xitao Yin, Xuefei Zhao","doi":"10.1007/s42823-024-00848-5","DOIUrl":"10.1007/s42823-024-00848-5","url":null,"abstract":"<div>Using durian shell as a carbon source and triethanolamine as a nitrogen dopant, nitrogen-doped carbon dots (N-CDs) were prepared via the hydrothermal method. First, by exploring different reaction times, reaction temperatures, and carbon source/dopant ratios to synthesize nitrogen-doped carbon dots, it is concluded that the best process conditions are 200 ℃, reaction time being 15h, and the dopant addition amount being 2mL. Structure and characteristics of the synthesized CDs were analyzed using X-ray photoelectron spectroscopy, Fourier-transform infrared, fluorescence (FL), ultraviolet–visible absorption, and Raman spectra. The N-CDs showed blue FL with a quantum efficiency of 4.28%. The FL characteristics of the N-CDs were utilized for ion detection, which demonstrated that ({text{MnO}}_{4}^{ - }) and ({text{Cr}}_{{2}} {text{O}}_{7}^{2 - }) ions caused distinct FL quenching through static quenching, while other ions had no significant quenching effect. The detection limits for ({text{MnO}}_{4}^{ - }) and ({text{Cr}}_{{2}} {text{O}}_{7}^{2 - }) were 37.5 and 46.2 nM, respectively. The N-CDs were subsequently employed to detect these ions in actual water samples, producing satisfactory results. Therefore, the preparation of N-CDs using durian shell as raw material and its application in practical detection work have good application feedback, which not only provides a new way for the reuse of fruit and vegetable wastes but also provides a new detection means for environmental monitoring pollutants.</div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1153 - 1165"},"PeriodicalIF":5.5,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084911","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

Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays 基于冰植物花提取物中N， K， ca掺杂碳量子点的发光生物塑料纳米复合材料在量子点光学显示中的应用

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-21 DOI: 10.1007/s42823-024-00845-8

Varnika Singh, Gajal Singla, Vishal Kansay, Varun Dutt Sharma, Anita Bhatia, Nikhil Kumar, M. K. Bera

{"title":"Luminescent bioplastic nanocomposite based on N, K, Ca-doped carbon quantum dots derived from ice plant flower extract for applications in quantum dot-based optical displays","authors":"Varnika Singh, Gajal Singla, Vishal Kansay, Varun Dutt Sharma, Anita Bhatia, Nikhil Kumar, M. K. Bera","doi":"10.1007/s42823-024-00845-8","DOIUrl":"10.1007/s42823-024-00845-8","url":null,"abstract":"<div>Quantum dot nanocomposite-based luminescent materials have gained attention for solid-state lighting and optical displays. This study presents a one-step, eco-friendly hydrothermal process to synthesize nitrogen, potassium, and calcium-doped carbon quantum dots (N, K, Ca-doped CQDs) from the flower extract of Mesembryanthemum crystallinum L. (ice plant). The CQDs were characterized using HRTEM, EDX, SAED, XPS, XRD, NMR, FTIR, zeta potential, UV–Vis, and photoluminescence spectroscopy. HRTEM revealed an average particle size of 4.6 nm, with a range of 2 to 7 nm. The CQDs exhibited a quantum yield of 20%, excellent water solubility, photostability, and greenish fluorescence under UV (365 nm). The fluorescence spectra were analyzed using CIE (Commission Internationale de l’Eclairage) chromaticity coordinates to determine the emitted color. The fluorescence emission behavior was influenced by solvent polarity, locally excited (LE) states, intramolecular charge transfer (ICT) processes, and hydrogen bonding. The hydrogen bonds between N, K, Ca-doped CQDs and DI water likely enhanced the stability of the ICT state, resulting in a red shift in fluorescence. Additionally, we developed an eco-friendly wheat-starch-based bioplastic nanocomposite by embedding the CQDs. The effects of CQD concentration and pH sensitivity on luminescent properties were explored. Finally, we demonstrated a practical application by designing a conceptual nameplate-like calligraphy using the optimized CQDs@bioplastic nanocomposite film (CQD concentration: 240 mg/mL, pH: 2.7), highlighting its potential for luminescent film applications.</div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1167 - 1185"},"PeriodicalIF":5.5,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084878","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

MnO2 nanowires anchored on biomass-derived porous carbon for enhanced supercapacitive performance 二氧化锰纳米线锚定在生物质衍生的多孔碳上以增强超级电容性能

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-20 DOI: 10.1007/s42823-024-00846-7

Tao Feng, Yufan Mo, Bowei Zou, Chunhui Zhang, Hui Chen, Gang Liu

{"title":"MnO2 nanowires anchored on biomass-derived porous carbon for enhanced supercapacitive performance","authors":"Tao Feng, Yufan Mo, Bowei Zou, Chunhui Zhang, Hui Chen, Gang Liu","doi":"10.1007/s42823-024-00846-7","DOIUrl":"10.1007/s42823-024-00846-7","url":null,"abstract":"<div>Incorporation of pseudocapacitive materials into porous carbon is a promising strategy to boost electrochemical performance. Herein, composite of biomass-derived porous carbon and MnO2 (a typical pseudocapacitive material) was facilely fabricated through an in-situ synthesis approach with sorghum seeds derived porous carbon (SSC) as the skeleton for MnO2 deposition. The as-prepared composite (MnO2@SSC) exhibits hierarchical porous structure with abundant interlaced MnO2 nanowires wrapping on the surface. While the porous structure is beneficial to the active sites exposure and electrolyte ions transport, the interlaced three-dimensional (3D) network of MnO2 nanowires significantly boosts the tolerance toward volume shrinkage/expansion during the cyclic process. Consequently, the MnO2@SSC-based electrode delivered quite promising supercapacitive performance including superior specific capacitance of 482.7 F/g at 0.5 A/g, outstanding long-term cycling stability (95.8% specific capacitance retention after 20,000 cycles) and high energy density of 13.7 Wh/kg at power density of 298.1 W/kg. Furthermore, all-solid-state flexible supercapacitor based on MnO2@SSC can be facilely bent to various angles (0° to 150°) without significant degradation in the capacitive performance. This study provides a facile, cost-effective, and sustainable approach for the fabrication of high-performance electrode materials.</div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1139 - 1151"},"PeriodicalIF":5.5,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084905","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

Synthesis of highly crystalline electrochemically exfoliated graphene as a conductive additive for lithium-ion batteries 作为锂离子电池导电添加剂的高结晶电化学剥离石墨烯的合成

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-20 DOI: 10.1007/s42823-025-00861-2

Seo La Yoon, Ho Seok Park, Young-Pyo Jeon

{"title":"Synthesis of highly crystalline electrochemically exfoliated graphene as a conductive additive for lithium-ion batteries","authors":"Seo La Yoon, Ho Seok Park, Young-Pyo Jeon","doi":"10.1007/s42823-025-00861-2","DOIUrl":"10.1007/s42823-025-00861-2","url":null,"abstract":"<div>This study introduces a cost-effective electrochemical exfoliation technique for producing highly crystalline graphene from graphite. By optimizing key exfoliation parameters, including voltage, electrolyte concentration, and temperature, the efficiency of the exfoliation process and the quality of the resulting graphene were significantly improved. To further enhance crystallinity, minimize defect sites, and achieve superior material properties, the as-prepared electrochemically exfoliated graphene (AeEG) underwent post-heat treatment at temperatures ranging from 1500 to 2950 °C. When employed as a conductive additive, eEGs heat-treated at 1800 °C or higher significantly improved both cycle stability and rate performance in LIB coin cells, while maintaining a discharge capacity approximately 10–12 mAh/g higher than that of the control, which utilized Super P. The enhanced performance is attributed to the formation of an efficient conductive network and superior electron transport properties, driven by the high crystallinity and large aspect ratios of the heat-treated eEGs. These findings highlight the potential of eEG as a highly effective conductive additive for advanced battery industries, offering significant improvements in energy storage performance, specific capacity, and rate characteristics.</div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1113 - 1124"},"PeriodicalIF":5.5,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084906","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

Advancements in carbon microsphere-based nanocomposites: synthesis, properties and multifaceted applications: a comprehensive review 碳微球基纳米复合材料的合成、性能和多方面应用研究进展

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-20 DOI: 10.1007/s42823-024-00851-w

A. Vindhyasarumi, Appukuttan Saritha, A. S. Sethulekshmi, Kuruvilla Joseph

引用次数: 0

Advance in the modification of g-C3N4-based composite for photocatalytic H2 production g- c3n4基复合材料光催化制氢改性研究进展

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-20 DOI: 10.1007/s42823-024-00853-8

Jizhou Jiang, Lianglang Yu, Jiahe Peng, Weiping Gong, Wei Sun

{"title":"Advance in the modification of g-C3N4-based composite for photocatalytic H2 production","authors":"Jizhou Jiang, Lianglang Yu, Jiahe Peng, Weiping Gong, Wei Sun","doi":"10.1007/s42823-024-00853-8","DOIUrl":"10.1007/s42823-024-00853-8","url":null,"abstract":"<div>The development of hydrogen energy is crucial for achieving global dual-carbon strategic goals, namely \"carbon peak\" and \"carbon neutrality.\" Photocatalytic water splitting, powered by solar energy, presents a promising approach to hydrogen production. Advancing this technology requires the development of photocatalysts that are cost-effective, highly active, and stable. As a non-metallic semiconductor, g-C3N4 stands out for its potential in sustainable energy and environmental remediation technologies, garnering considerable interest for its efficiency in harnessing light-driven reactions. Although g-C3N4 exhibits promising characteristics, its practical application is significantly hindered by the rapid recombination of photogenerated charge carriers and its limited light absorption range. This review highlights various strategies employed to improve the photocatalytic hydrogen production efficiency of g-C3N4, including heteroatom doping, microstructure control, co-catalyst modification, defect engineering, and heterojunction construction. These strategies enhance active site density, light absorption capacity, and photogenerated charge separation in g-C3N4, thereby boosting electron migration rates and improving photocatalytic hydrogen production. Additionally, we explore the potential of integrating cutting-edge AI technology with advanced instrumentation for the prediction, design, preparation, and in-situ characterization of g-C3N4-based photocatalytic systems. This review aims to offer key insights into the design, development, and practical application of innovative, high-performance carbon-based catalysts.</div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 2","pages":"417 - 440"},"PeriodicalIF":5.5,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740910","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

Open-atmosphere spinning of carbon nanotube fibers sans hydrogen flow by floating catalyst chemical vapor deposition: an insight into the mechanism 浮动催化剂化学气相沉积无氢流的碳纳米管纤维的开放气氛纺丝：对机理的洞察

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-20 DOI: 10.1007/s42823-024-00843-w

Rajath Alexander, Amit Kaushal, Jaspreet Singh, Kinshuk Dasgupta

{"title":"Open-atmosphere spinning of carbon nanotube fibers sans hydrogen flow by floating catalyst chemical vapor deposition: an insight into the mechanism","authors":"Rajath Alexander, Amit Kaushal, Jaspreet Singh, Kinshuk Dasgupta","doi":"10.1007/s42823-024-00843-w","DOIUrl":"10.1007/s42823-024-00843-w","url":null,"abstract":"<div>This study introduces a novel method for synthesizing carbon nanotube (CNT) fibers using floating catalyst chemical vapor deposition (FC-CVD) in an open-atmosphere without the need for hydrogen as a carrier gas. Traditional FC-CVD techniques depend on hydrogen gas and require a harvest box with inert gas purging, which restricts scalability. Our approach utilizes nitrogen gas as the sole carrier, allowing for CNT fiber production without a harvest box. To understand the spinning process mechanism in an open-atmosphere, we conducted thermodynamic and computational fluid dynamics (CFD) analyses. Methanol was selected as the carbon source based on thermodynamic calculations, which revealed that at high temperatures, methanol forms CO and H2 as thermodynamically stable species instead of carbon (C), thereby preventing soot formation. Moreover, methanol undergoes catalytic cracking exclusively in the presence of catalysts, further preventing soot formation. This approach allows operation at high partial pressure, even above the upper explosive limit (UEL), effectively preventing combustion. A 600 mm cooling zone was incorporated into the reactor to lower the outlet gas temperature below methanol's auto-ignition point, mitigating combustion risks. CFD calculations were employed to determine the necessary cooling zone length. Additionally, we developed a predictive model using the XGBoost machine learning method to efficiently map the parameter space for CNT fiber spinning, achieving an accuracy of 95.24%. The resulting CNT fibers demonstrate high electrical conductivity (240 ± 24 S/cm) and a low ID/IG ratio, indicating a high degree of crystallinity.</div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1125 - 1138"},"PeriodicalIF":5.5,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42823-024-00843-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084904","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 multiple stretching on microstructure and mechanical properties of PAN-based carbon fibers 多次拉伸对pan基碳纤维微观结构和力学性能的影响

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-19 DOI: 10.1007/s42823-024-00840-z

Shuang Li, Di Cui, Yu Wang, Aijun Gao, Yuanjian Tong

引用次数: 0

A dual-mode fluorescent probe for temperature-sensing and metal ions detection based on castor leaves-derived carbon quantum dots 基于蓖麻叶衍生碳量子点的温度传感和金属离子检测双模荧光探针

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2025-01-19 DOI: 10.1007/s42823-024-00847-6

Avinash Kumar, Ishant Kumar, Sandeep Kumar, Anchal Sharma, Amit Sharma, Arvind K. Gathania

{"title":"A dual-mode fluorescent probe for temperature-sensing and metal ions detection based on castor leaves-derived carbon quantum dots","authors":"Avinash Kumar, Ishant Kumar, Sandeep Kumar, Anchal Sharma, Amit Sharma, Arvind K. Gathania","doi":"10.1007/s42823-024-00847-6","DOIUrl":"10.1007/s42823-024-00847-6","url":null,"abstract":"<div>This study incorporates the formation of carbon quantum dots (CQDs) via a hydrothermal approach, recording the first-time use of castor leaves as a natural precursor. The used precursor offers various benefits including novelty, abundance, elemental composition, and biocompatibility. CQDs were further characterized with multiple techniques including high-resolution transmission electron microscope (HR-TEM), X-ray photoelectron microscopy (XPS), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, UV–visible spectroscopy, Zeta analysis, and optical spectroscopy. They are fundamentally composed of carbon (71.37%), nitrogen (3.91%), and oxygen (24.73%) and are nearly spherical, and uniformly distributed with an average diameter of 2.7 nm. They possess numerous interesting characteristics like broad excitation/emission bands, excitation-sensitive emission, marvelous photostability, reactivity, thermo-sensitivity, etc. A temperature sensor (thermal sensitivity of 0.58% C−1) with repeatability and reversibility of results is also demonstrated. Additionally, they were found selective and sensitive to ions in aqueous solutions. So, they are also utilized as a fluorescent probe for metal ion (Fe3+) sensing. The lowest limit of detection (LOD) value for the current metal ion sensor is 19.1 µM/L.</div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 3","pages":"1097 - 1112"},"PeriodicalIF":5.5,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084867","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