Carbon Letters最新文献

{"title":"Iron-nickel-based catalyst as efficient electrocatalyst for hydrogen evolution reaction","authors":"Shasha Zhu,&nbsp;Fei Chen,&nbsp;Ling Liu,&nbsp;Tianhan Huang,&nbsp;Yan Pan,&nbsp;Haoyu Wang,&nbsp;Lei Liu,&nbsp;Qing Wang,&nbsp;Zhaoyang Li,&nbsp;Yuxiang Fei,&nbsp;Feihong Wang,&nbsp;Tianming Chen,&nbsp;Ye Yuan,&nbsp;Qingyuan Guo,&nbsp;Cheng Ding","doi":"10.1007/s42823-026-01074-x","DOIUrl":"10.1007/s42823-026-01074-x","url":null,"abstract":"<div><p>In this work, the novel FeNi-LDH/NF and (Fe-Ni)O_x/NF were prepared using facile hydrothermal and calcination methods. The electrocatalyst FeNi-LDH/NF ((Fe-Ni)O_x/NF) exhibits excellent HER catalytic activity, and produced an overpotential of 147 (210) mV at 10 mA cm⁻² with a small Tafel value of 97 (100) mV dec⁻¹ in 1.0 M KOH electrolyte. Due to the high-density active centers exposed on the surface of FeNi-based hydroxides, their electrical conductivity, and the synergistic effect between the metals, the catalytic activity of FeNi-based hydroxides is superior to that of FeNi-based oxides. The overall experimental findings showcase a feasible approach for exploring the potential of the nonprecious metal-based FeNi-LDH/NF ((Fe-Ni)O_x/NF) nanoelectrocatalyst towards alkaline HER.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"36 4","pages":"1435 - 1445"},"PeriodicalIF":6.2,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458930","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}

{"title":"Leveraging petroleum-derived carbon for atmospheric water harvesting","authors":"Wala Algozeeb,&nbsp;Ahmed Owais,&nbsp;Qasim Saleem,&nbsp;Noha Al-Shihri,&nbsp;Emad Al-Shafie,&nbsp;Hendrik Muller,&nbsp;Nadrah Alawani,&nbsp;Abdulkarim Makki,&nbsp;Hasan Al-Tarouti,&nbsp;Amer Al Tuwailib,&nbsp;Ahmed AlAsseel,&nbsp;Ibrahim Al-Zahrani","doi":"10.1007/s42823-026-01072-z","DOIUrl":"10.1007/s42823-026-01072-z","url":null,"abstract":"<div><p>The growing global water crisis necessitates innovative solutions that are both cost-effective and environmentally sustainable. Atmospheric water harvesting (AWH) has emerged as a promising avenue of research to address this pressing challenge. Here, we present a novel approach that re-purposes low-value petroleum feedstocks for AWH through their conversion to porous carbon (PC). Utilizing a potassium carbonate-assisted carbonization process, we develop PC from heavy and light cycle oils, and vacuum residue. While all sources yield materials with near superhydrophilic surfaces, only the cycle oils produce PC with high surface area and micoporous architectures. These engineered carbons demonstrate great water adsorption capacities of up to 23 wt% at 60% relative humidity (RH), surpassing commercially available carbon materials.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"36 4","pages":"1555 - 1568"},"PeriodicalIF":6.2,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458931","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}

{"title":"Correction: Efficient covalent functionalization of multi-walled carbon nanotubes in a flow reactor","authors":"Taehoon Kang,&nbsp;Chae Yeon Park,&nbsp;Wonho Cho,&nbsp;Seungjun Lee,&nbsp;Byung Hwa Seo,&nbsp;Ye-Jin Hwang","doi":"10.1007/s42823-026-01077-8","DOIUrl":"10.1007/s42823-026-01077-8","url":null,"abstract":"","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"36 4","pages":"1999 - 1999"},"PeriodicalIF":6.2,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458876","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}

{"title":"Synergistic optimization of strength–conductivity balance in CNTs/Cu composites via powder morphology pre-regulation and two-stage ball milling","authors":"Wei Liu,&nbsp;Chao Lei,&nbsp;Yunna Zhang,&nbsp;Zhenlin Lu,&nbsp;Hui Xie,&nbsp;Lei Jia","doi":"10.1007/s42823-026-01075-w","DOIUrl":"10.1007/s42823-026-01075-w","url":null,"abstract":"<div><p>Achieving a superior combination of strength and electrical conductivity in carbon nanotubes (CNTs) reinforced Cu matrix composites remains a significant challenge, primarily due to CNTs agglomeration and poor interfacial bonding. This study introduces a systematic integrated processing route combining Cu powder morphology control with a two-stage ball milling process. By rationally integrating validated powder processing steps and optimizing key process parameters, we directly address the long-standing strength–conductivity trade-off in CNTs/Cu composites. Dendritic Cu powder was first transformed into flake-shaped particles via pre-ball milling, increasing its specific surface area to enhance subsequent CNTs adhesion. A secondary ball milling step was applied to the CNTs/Cu flake mixture, effectively embedding CNTs into the matrix. Compared to composites prepared using dendritic or flake-shaped Cu powder alone, the composite subjected to the two-stage ball milling process exhibited a more homogeneous CNTs dispersion, reduced agglomeration, and enhanced interfacial bonding. Consequently, this optimized composite demonstrated a superior balance of tensile strength and electrical conductivity, offering a scalable pathway for fabricating high-performance CNTs/Cu composites.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"36 4","pages":"1539 - 1546"},"PeriodicalIF":6.2,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148458873","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}

{"title":"Effects of nitrogen functional groups and pore structure on high-affinity dye adsorption by plasma-treated activated carbon pellets","authors":"Min Seong Han,&nbsp;Woong Kwon,&nbsp;Youngbin Baek,&nbsp;Euigyung Jeong,&nbsp;Byong Chol Bai","doi":"10.1007/s42823-026-01069-8","DOIUrl":"10.1007/s42823-026-01069-8","url":null,"abstract":"<div><p>Expanding dye use elevates ecological risks by increasing dye-contaminated wastewater discharge. Cationic dyes resist removal owing to high stability and toxicity, but activated carbon adsorption remains an efficient and economical treatment. In this study, we examine methylene blue (MB) removal using activated carbon prepared from petroleum pitch through KOH activation, followed by nitrogen plasma treatment for 5, 10, 15, and 30 min. To characterize the surface chemistry and porosity of the nitrogen-functionalized carbon, we employed elemental analysis (EA), X-ray photoelectron spectroscopy (XPS), and N₂ adsorption–desorption (Brunauer-Emmett-Teller, BET) measurements. Batch adsorption tests were conducted at MB concentrations of 100, 200, 300, 400, and 500 mg L⁻¹. The nitrogen plasma treatment increased the surface nitrogen content (from 0.44% to 1.94% depending on the treatment conditions) and enhanced MB adsorption performance. Equilibrium data were fitted using the Langmuir and Freundlich isotherm models; the Freundlich model showed a better correlation, indicating multilayer adsorption on a heterogeneous surface and suggesting that plasma-introduced nitrogen sites provided additional adsorption sites.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"36 2","pages":"1075 - 1083"},"PeriodicalIF":5.8,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752428","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}

{"title":"A combined experimental and molecular modelling study on fixed bed adsorption of carbon dioxide over activated carbon","authors":"Mohammed K. Al Mesfer,&nbsp;Mohd Danish,&nbsp;Khursheed B. Ansari,&nbsp;Quang Thang Trinh,&nbsp;Mumtaj Shah","doi":"10.1007/s42823-026-01068-9","DOIUrl":"10.1007/s42823-026-01068-9","url":null,"abstract":"<div><p>The present work demonstrates a comprehensive experimental and molecular modeling study of fixed bed adsorption of CO₂ over commercial activated carbon (AC-RBAA-3). The AC-RBAA-3 was characterized using Brunauer-Emmett-Teller (BET) surface area analyzer, Scanning Electron Microscope (SEM), and Raman analyses. The lower temperature (or 298 K) remained best for CO₂ capture over AC-RBAA-3 and allowed robust adsorption up to 1140 s compared to the higher temperatures (328 K; 878 s). The breakthrough profile of CO₂ decreased with increasing feed gas flow rate because of lower residence time, especially at higher flow rates. Interestingly, the lower initial CO₂ concentration showed a better breakthrough profile compared to the higher one. The maximum CO₂ uptake of 1.18 mmol/g was accomplished at 298 K with a flow feed rate of 5 L/min and C_in=5%. The minimal length of mass transfer zone (L_MTZ) nearly equal to 1.77 cm was determined with an improved capacity utilization factor (i.e., 0.965 at 298 K). The maximum usable bed height was 23.39 cm, with an improved efficiency of 93.57%. Additionally, the experimental results were verified by Density Functional Theory (DFT) calculations, describing that CO₂ adsorbed weakly on perfect graphite surfaces, CO₂ adsorbed weakly mainly via van der Waals interaction, with the binding energy of -21.5 kJ/mol, while the adsorption energy of CO₂ in the pores of graphite is exothermic. However, at the amorphous site of the activated carbon, CO₂ adsorbed more strongly with the energy of -41.5 kJ/mol, suggesting that this should be considered for further enhancement in the CO₂ adsorption efficiency of activated carbon. Charge density plots revealed that the charge transfer between CO₂ and the amorphous carbon sites was the factor contributing to the enhanced affinity of CO₂ on activated carbon, justifying its effectiveness in capturing CO₂ obtained in our experiments.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"36 3","pages":"1365 - 1384"},"PeriodicalIF":5.8,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147985310","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}

{"title":"Thermodynamic analysis of NCM precursor co-precipitation based on a hybrid activity model","authors":"Seok-Hee Lee,&nbsp;Taehun Jeon,&nbsp;Neung-Hae Kim,&nbsp;Minjun Kim,&nbsp;Seunghoon Nam,&nbsp;Chunjoong Kim","doi":"10.1007/s42823-026-01045-2","DOIUrl":"10.1007/s42823-026-01045-2","url":null,"abstract":"<div><p>This study examines the thermodynamic behaviour of coprecipitation reaction for Ni_{1-<i>x</i>-<i>y</i>}Co_<i>x</i>Mn_<i>y</i>(OH)₂ precursors that is necessary for preparation of cathode materials, LiNi_{1-<i>x</i>-<i>y</i>}Co_<i>x</i>Mn_<i>y</i>O₂, of Li-ion batteries under high-ionic-strength process solutions. To capture non-ideal solution behavior while maintaining practical parameter availability, a hybrid activity framework is proposed. Pitzer interactions are applied to dominant background ions including Na⁺, NH₄⁺, and SO₄^2-, while Davies and extended Debye–Hückel corrections are employed for metal-ammine and metal-hydroxo complexes. Using a consistent activity-based formulation, the total solubilities of Ni²⁺, Co²⁺, and Mn²⁺ are calculated and visualized exclusively within the precipitation-relevant regime. Under the industrially relevant pH range (9 - 12), optimum pH ranges are identified based on inter-metal disparity and precipitation margin as a function of composition of precursors and total ammonia concentration. Compared with concentration-only or Davies-only approaches, the hybrid framework yields a more conservative and practically relevant operating window for pH and ammonia control. Although experimental calibration is not included, the framework provides an activity-consistent solubility map suitable for extension with refined equilibrium data.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"36 3","pages":"1125 - 1143"},"PeriodicalIF":5.8,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147985347","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}

{"title":"Microwave-DES activation of poplar-derived ultramicroporous carbon for efficient CO2/N2 separation with extremely high pore utilization rate","authors":"Hongliang Sheng,&nbsp;Tao He,&nbsp;Ye Li,&nbsp;Chengyang Cao,&nbsp;Song He","doi":"10.1007/s42823-026-01066-x","DOIUrl":"10.1007/s42823-026-01066-x","url":null,"abstract":"<div>\u0000 \u0000 <p>Poplar wood was employed as the precursor to develop a coupled “microwave self-gasification &amp; aqueous post-modification” protocol that enables instantaneous activation within a microwave field, yielding activated carbon dominated by ultra-micropores (&lt; 0.7 nm). Despite a modest BET surface area of ~ 900 m²/g, the material exhibits an exceptional CO₂ uptake of 180.4 mg/g at 0 °C and 1 bar—1.6-fold higher than at 25 °C—while N₂ uptake remains below 30 mg/g under the same conditions. On a pore-volume basis, the carbon stores 443.79 mg CO₂ per cm³ at 0 °C and 278.62 mg/cm³ at 25 °C. CO₂ adsorption proceeds via a multilayer mechanism with the isosteric heat (Qst) decreasing from 45 to 23 kJ mol⁻¹, whereas N₂ follows a monolayer pathway with Qst held between 20 and 24 kJ mol⁻¹. IAST calculations reveal that CO₂/N₂ selectivity rises from 70 to 90 with increasing pressure at 0 °C and levels off around 50 at 25 °C. Dynamic breakthrough experiments deliver a separation factor of 8.28 for a 15% CO₂/85% N₂ mixture. GCMC simulations further indicate that O–C = O-functionalized surfaces confer the highest CO₂ capacity, while C–S–C motifs are the least favorable in competitive adsorption.</p>\u0000 </div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"36 3","pages":"1337 - 1354"},"PeriodicalIF":5.8,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147985348","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}

{"title":"Green preparation of biomass-derived carbon dots: a platform for fluorescent detection of glutathione","authors":"Lin Hou,&nbsp;Xiaopeng Yang,&nbsp;Yali Li,&nbsp;Yilin Yang,&nbsp;Yuying Han,&nbsp;Rui Hu,&nbsp;Lixin Ding,&nbsp;Xingyu Hou","doi":"10.1007/s42823-026-01067-w","DOIUrl":"10.1007/s42823-026-01067-w","url":null,"abstract":"<div>\u0000 \u0000 <p>Herein, biomass-derived carbon dots (BD-CDs) were synthesized via a solid-state pyrolysis method. A combination of various characterization techniques, including fluorescence lifetime decay, Fourier-transform infrared spectroscopy, and Zeta potential measurements, was employed to elucidate the group binding mechanism between BD-CDs and glutathione (GSH). Upon application to actual samples, including tomatoes, cucumbers, and celery, the method exhibited exceptional analytical efficacy. Calibration curves comprising two distinct segments (0-120 µM and 120-260 µM), coupled with a detection limit of 0.02 µM. This strategy provides a dependable method for the highly sensitive detection of GSH within intricate matrices, presenting auspicious potential for further development and application within the domains of biosensing and pharmaceutical analysis.</p>\u0000 </div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"36 3","pages":"1355 - 1364"},"PeriodicalIF":5.8,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147985236","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}

{"title":"Dual-waste valorization of eggshell and coconut shell–pith biomass into CaO/activated carbon catalysts: synthesis, characterization, and structure–performance correlations in biodiesel transesterification","authors":"Moeen Ali Rashad,&nbsp;Murid Hussain,&nbsp;Farrukh Jamil,&nbsp;Muhammad Haris Hamayun,&nbsp;Ali Ahsan,&nbsp;Parveen Akhter,&nbsp;Young-Kwon Park","doi":"10.1007/s42823-026-01065-y","DOIUrl":"10.1007/s42823-026-01065-y","url":null,"abstract":"<div><p>In response to the global demand for cleaner energy, this research presents a resourceful and sustainable route for biodiesel production through the design of a novel catalyst derived from two agro-waste materials: chicken eggshells and coconut shell–pith biomass. The CaO/activated carbon (CaO/AC) composite catalysts were synthesized via calcination, carbonization, and wet impregnation, followed by thermal treatment, without the use of surfactants, binders, or toxic chemicals, ensuring an environmentally benign process. Characterization by XRD confirmed the presence of crystalline CaO phases and amorphous carbon. FTIR and SEM analyses further validated the functional group interactions and porous surface morphology, which are critical for catalytic performance. The catalyst was evaluated by transesterifying waste cooking oil (WCO) at varying methanol-to-oil ratios (8:1–10:1), catalyst loadings (6–8 wt%), and reaction temperatures (60–65 °C). The best performance was observed with the C-CCS catalyst (derived from coconut shell), achieving a maximum biodiesel yield of 92.48% at a 10:1 MeOH: oil ratio, 8 wt% catalyst loading, 65 °C, and 90 min. The resulting biodiesel met ASTM D6751 specifications in all key fuel properties, including viscosity, density, flash point, acid value, and moisture content. This research presents a low-cost and scalable synthesis strategy that valorizes dual biowaste streams while producing engine-grade biodiesel. Its operational simplicity and high efficiency make it a strong candidate for industrial biodiesel applications, particularly in resource-constrained settings.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"36 3","pages":"1321 - 1335"},"PeriodicalIF":5.8,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147985193","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}