Carbon Letters最新文献

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Chemical composition-driven wettability and pore structure modulation in coal tar pitch for enhanced prebaked anode performance in aluminum electrolysis 化学成分驱动的煤焦油沥青润湿性和孔隙结构调制对铝电解中预焙阳极性能的提高
IF 5.8 3区 材料科学
Carbon Letters Pub Date : 2025-06-04 DOI: 10.1007/s42823-025-00926-2
Jun Ma, Shen Zhu, Xueli Wu, Xun He, Weiyi Wang, Juan Li, Cheng Yang, Yanli Liu, Chuanjun Tu
{"title":"Chemical composition-driven wettability and pore structure modulation in coal tar pitch for enhanced prebaked anode performance in aluminum electrolysis","authors":"Jun Ma,&nbsp;Shen Zhu,&nbsp;Xueli Wu,&nbsp;Xun He,&nbsp;Weiyi Wang,&nbsp;Juan Li,&nbsp;Cheng Yang,&nbsp;Yanli Liu,&nbsp;Chuanjun Tu","doi":"10.1007/s42823-025-00926-2","DOIUrl":"10.1007/s42823-025-00926-2","url":null,"abstract":"<div><p>The constituents of coal tar pitch (CTP) significantly impact the wettability of calcined coke (CC) and the performance of prebaked anodes (PA) used in aluminum electrolysis. However, balancing wettability and carbon residue within CTP remains a central challenge in material applications. In addition, limited pore permeability and structural stability in these composites hinder the effective utilization of PA. Enhancing CTP fluidity is crucial for overcoming these challenges. In this work, a novel method was developed to modify CTP utilizing various coal tar fractions, enabling controlled modulation of CTP composition and wettability. Incorporating different fractions allowed for substantial control over interfacial bonding and pore structure. The chemical composition, functional groups, and elemental content of the CTP were analyzed via X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and proton nuclear magnetic resonance (<sup>1</sup>H NMR). Subsequently, systematic comparisons of PA materials produced from different CTP formulations demonstrated improved wettability and enhanced mechanical properties. Moreover, DFT calculations were performed to compare the adsorption energies of small molecules from different coal tar fractions with coke, reflecting the interaction strength between the molecules and the solid surface. Using micro-computed tomography (μ-CT), the refined pore structure was examined, resulting in a PA composite with an optimized balance of high strength and toughness.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 5","pages":"2319 - 2334"},"PeriodicalIF":5.8,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230427","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
Real-time cure monitoring via carbon nanotube networks enables mechanical property optimization in post-cured epoxy resins 通过碳纳米管网络进行实时固化监测,可以优化固化后环氧树脂的力学性能
IF 5.8 3区 材料科学
Carbon Letters Pub Date : 2025-06-03 DOI: 10.1007/s42823-025-00929-z
M. Jafarypouria, B. Mahato, S. G. Abaimov
{"title":"Real-time cure monitoring via carbon nanotube networks enables mechanical property optimization in post-cured epoxy resins","authors":"M. Jafarypouria,&nbsp;B. Mahato,&nbsp;S. G. Abaimov","doi":"10.1007/s42823-025-00929-z","DOIUrl":"10.1007/s42823-025-00929-z","url":null,"abstract":"<div><p>This research presents a single-walled carbon nanotube (SWCNT)-enabled real-time monitoring system to optimize post-curing conditions (temperature and duration) for epoxy resin. This method can serve as an alternative to traditional methods like Differential Scanning Calorimetry (DSC), which is effective in measuring the degree of cure in polymers during industrial curing (manufacturer-recommended cure cycle). Two different programs using SWCNTs were employed to design the cure cycles for investigating the development of mechanical properties: Program A as the comparison of effects of varied duration of high-temperature curing and Program B as high-temperature curing followed by the varied duration of low-temperature post-curing. By correlating variation in the electrical resistance of SWCNT with curing stages, we illustrate that extending post-curing at 100 °C for 24 h after an initial 3-h cure at 130 °C increases (i) tensile strength by 60% and ultimate tensile elongation by 101% and (ii) shear strength by 14% and ultimate shear elongation by 16% compared to industry standards. This approach not only improves mechanical performance but also enables precise, non-destructive cure-state detection, offering a scalable solution for high-performance composites in the aerospace and automotive sectors. </p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 5","pages":"2349 - 2363"},"PeriodicalIF":5.8,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230364","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
Photosupercapacitors: integrating photovoltaics and supercapacitors for self-charging powerpacks 光超级电容器:集成光伏和超级电容器用于自充电电源组
IF 5.8 3区 材料科学
Carbon Letters Pub Date : 2025-05-31 DOI: 10.1007/s42823-025-00925-3
Sameera Alex, Jelby George, Manoj Balachandran
{"title":"Photosupercapacitors: integrating photovoltaics and supercapacitors for self-charging powerpacks","authors":"Sameera Alex,&nbsp;Jelby George,&nbsp;Manoj Balachandran","doi":"10.1007/s42823-025-00925-3","DOIUrl":"10.1007/s42823-025-00925-3","url":null,"abstract":"<div><p>Photosupercapacitors are emerging with promising prospects for advanced applications such as wearables and IoT devices. Solar-driven systems capable of both harvesting and storing energy are increasingly viewed as practical and sustainable alternatives on a global scale. Incorporating self-charging energy units can play a transformative role in rural electrification by providing affordable and reliable power to areas where traditional electrification methods are ineffective or inaccessible. Depending on the solar cell part integrated with the supercapacitors, the photosupercapacitors can be classified as different types. In this review, we shall discuss about the most prominently reported ones based on perovskite and dye-sensitized solar cells (DSSCs).</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 4","pages":"1513 - 1527"},"PeriodicalIF":5.8,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171758","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 aromatization degree of coal liquefaction pitch on the mechanical properties of pitch-based carbon fibers 煤液化沥青芳构化程度对沥青基碳纤维力学性能的影响
IF 5.8 3区 材料科学
Carbon Letters Pub Date : 2025-05-28 DOI: 10.1007/s42823-025-00914-6
Wenshuai Xi, Xiongchao Lin, Jingdong Yang, Caihong Wang, Yonggang Wang
{"title":"Effect of aromatization degree of coal liquefaction pitch on the mechanical properties of pitch-based carbon fibers","authors":"Wenshuai Xi,&nbsp;Xiongchao Lin,&nbsp;Jingdong Yang,&nbsp;Caihong Wang,&nbsp;Yonggang Wang","doi":"10.1007/s42823-025-00914-6","DOIUrl":"10.1007/s42823-025-00914-6","url":null,"abstract":"<div><p>The aromatization degree of coal liquefaction pitch is closely related to its molecular structure evolution and the properties of derived carbon fibers. Using refined coal direct liquefaction pitch (RCLP) as raw material, pitches with different aromatization degrees were prepared by the self-pressurization/N₂ blowing two-stage thermal condensation method. Carbon fibers were then produced through melt spinning, oxidative stabilization, and carbonization. As the aromatization degree advanced, the C/H atomic ratio rose from 1.55 to 2.01, with the mesophase content nearing 100%. During RCLP thermal polymerization, large toluene-insoluble molecules were readily generated, yet the enrichment of the mesophase was comparatively sluggish. The spinnable pitch from RCLP had a relatively high aliphatic hydrogen content (33.40% ~ 13.69%) and a lower aromaticity (91.62% ~ 96.90%). Increasing aromatization made the carbon fiber cross-section’s radial transverse texture more distinct and ordered. The carbon layers stacked closely and parallelly, leading to a continuously rising tensile modulus. Due to the inhomogeneity from isotropic and anisotropic component changes, the carbon fiber tensile strength first decreased and then increased. When the spinnable pitch C/H ratio was 1.84, the mesophase pitch-based carbon fiber had an average diameter of 14.78 μm, a tensile strength of 1140 MPa, and a tensile modulus of 209 GPa.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 5","pages":"2183 - 2195"},"PeriodicalIF":5.8,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230355","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
Interfacial control for uniformly depositing oxide dielectrics in top-gate graphene field-effect transistors 顶栅石墨烯场效应晶体管中均匀沉积氧化物介电体的界面控制
IF 5.8 3区 材料科学
Carbon Letters Pub Date : 2025-05-28 DOI: 10.1007/s42823-025-00923-5
Dong Yeong Kim, Hokyun Rho, Eunyoung Lee, Junwoo Kim, Sukang Bae, Tae-Wook Kim, Sang Hyun Lee
{"title":"Interfacial control for uniformly depositing oxide dielectrics in top-gate graphene field-effect transistors","authors":"Dong Yeong Kim,&nbsp;Hokyun Rho,&nbsp;Eunyoung Lee,&nbsp;Junwoo Kim,&nbsp;Sukang Bae,&nbsp;Tae-Wook Kim,&nbsp;Sang Hyun Lee","doi":"10.1007/s42823-025-00923-5","DOIUrl":"10.1007/s42823-025-00923-5","url":null,"abstract":"<div><p>The distinctive surface characteristics of two-dimensional(2D) materials present a significant challenge when developing heterostructures for electronic or optoelectronic devices. In this study, we present a method for fabricating top-gate graphene field-effect transistors (FETs) by incorporating a metal interlayer between the dielectric and graphene. The deposition of an ultrathin Ti layer facilitates the formation of a uniform HfO₂ layer on the graphene surface via atomic layer deposition (ALD). During the ALD process, the Ti layer oxidizes to TiO₂, which has a negligible impact on the current flow along the graphene channel. The mobility of graphene in the FET was enhanced in relation to the SiO₂-based back-gate FET by modifying the thin HfO₂ top-gate dielectric deposited on the Ti interlayer. Furthermore, shifts in the Dirac point and subthreshold swing were markedly reduced owing to the reduction in charge scattering caused by the presence of trap sites at the interface between graphene and SiO₂. This route to modulating the interface between 2D material-based heterostructures will provide an opportunity to improve the performance and stability of 2D electronics and optoelectronics.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 5","pages":"2299 - 2305"},"PeriodicalIF":5.8,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230358","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
MnMgFe-LDHs/ZIF-8/B, N-WMCNTs nanocomposites for efficient electrochemical detection of nitrite and heavy metal ions MnMgFe-LDHs/ZIF-8/B, N-WMCNTs纳米复合材料用于亚硝酸盐和重金属离子的高效电化学检测
IF 5.8 3区 材料科学
Carbon Letters Pub Date : 2025-05-28 DOI: 10.1007/s42823-025-00922-6
Xue Du, Tong Han, Biao Jin, Long-Yue Meng, Lian-Hua Han
{"title":"MnMgFe-LDHs/ZIF-8/B, N-WMCNTs nanocomposites for efficient electrochemical detection of nitrite and heavy metal ions","authors":"Xue Du,&nbsp;Tong Han,&nbsp;Biao Jin,&nbsp;Long-Yue Meng,&nbsp;Lian-Hua Han","doi":"10.1007/s42823-025-00922-6","DOIUrl":"10.1007/s42823-025-00922-6","url":null,"abstract":"<div><p>Contamination of food with heavy metal ions and nitrites poses a serious threat to human health. Consequently, the development of fast and sensitive platforms for detecting these contaminants is urgently required. In this paper, a novel MnMgFe-LDHs/DC sensor is constructed based on a simple strategy, in which MnMgFe layered double hydroxide (LDHs) is used as a metal precursor, and a unique \"island bridge\" carbon network structure is generated by its pyrolysis with ZIF-8@B, N-WMCNTs. The electrical conductivity was enhanced, and a large electroactive surface area was provided for the MnMgFe-LDHs/DC. The electrochemical properties of Pb<sup>2+</sup>, Cd<sup>2+</sup> and nitrite were investigated using this electrode as a working electrode. Under optimized conditions, the sensing platform exhibited a wide linear range with the Pb<sup>2+</sup>, Cd<sup>2+</sup>, and NO<sub>2</sub><sup>−</sup> limits of detection of 46.16 nM, 59.25 nM, and 0.083 μM, respectively. Of particular note is that this sensing platform exhibits outstanding anti-interference capabilities. It can precisely and efficiently conduct the detection of nitrite and heavy metal ions in pickled foods.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 5","pages":"2287 - 2297"},"PeriodicalIF":5.8,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230357","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
Copper cobaltate loaded on hollow carbon spheres: enhanced catalytic performance for transfer hydrogenation of acetophenone derivatives 载于空心碳球上的钴酸铜:增强对苯乙酮衍生物转移加氢的催化性能
IF 5.8 3区 材料科学
Carbon Letters Pub Date : 2025-05-27 DOI: 10.1007/s42823-025-00920-8
Boopathi Shagunthala Hariprasad, Jagadeesh Likhith, Senthilkumar Aravind, Sreenidhi M Varma, Kasirajan Prakash, Sundaram Ganesh Babu
{"title":"Copper cobaltate loaded on hollow carbon spheres: enhanced catalytic performance for transfer hydrogenation of acetophenone derivatives","authors":"Boopathi Shagunthala Hariprasad,&nbsp;Jagadeesh Likhith,&nbsp;Senthilkumar Aravind,&nbsp;Sreenidhi M Varma,&nbsp;Kasirajan Prakash,&nbsp;Sundaram Ganesh Babu","doi":"10.1007/s42823-025-00920-8","DOIUrl":"10.1007/s42823-025-00920-8","url":null,"abstract":"<div><p>The combination of copper and cobalt in the mixed metal oxides phase attracted considerable interest owing to their distinct characteristics and wide-ranging applications across various domains. In this study, we adopt a facile co-precipitation approach to prepare the hollow carbon spheres (HCSs) embedded with CuCo<sub>2</sub>O<sub>4</sub> nanoparticles to enhance the catalytic activity. HCSs are prepared using a hydrothermal template method followed by the removal of the silica template. The resulting CuCo<sub>2</sub>O<sub>4</sub> and HCSs are characterized by using X-ray diffraction, Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy, and Thermo-Gravimetric Analysis to ensure structural integrity and composition. Then, the CuCo<sub>2</sub>O<sub>4</sub> nanoparticle is doped on the porous structure of HCSs using a surface loading method and used as a catalyst for the transfer hydrogenation of acetophenone. The scope is extended using various substrates without a hydrogen source. This nano-catalytic system shows better yields in mild reaction conditions. There was no leaching of the material into the reaction system even after five cycles, thus confirmed by ICP-MS.</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 5","pages":"2253 - 2267"},"PeriodicalIF":5.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230233","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
Efficient charge transport and separation in Z-scheme CuPc/Bi2WO6 for enhanced photocatalytic CO2 reduction CuPc/Bi2WO6在光催化CO2还原中的高效电荷传输和分离
IF 5.8 3区 材料科学
Carbon Letters Pub Date : 2025-05-26 DOI: 10.1007/s42823-025-00919-1
Zi Hu, Jundong Meng, Xinyuan Xu, Liuyun Chen, Xuan Luo, Xinling Xie, Zuzeng Qin, Tongming Su
{"title":"Efficient charge transport and separation in Z-scheme CuPc/Bi2WO6 for enhanced photocatalytic CO2 reduction","authors":"Zi Hu,&nbsp;Jundong Meng,&nbsp;Xinyuan Xu,&nbsp;Liuyun Chen,&nbsp;Xuan Luo,&nbsp;Xinling Xie,&nbsp;Zuzeng Qin,&nbsp;Tongming Su","doi":"10.1007/s42823-025-00919-1","DOIUrl":"10.1007/s42823-025-00919-1","url":null,"abstract":"<div><p>Combining CuPc with semiconductor materials as organic‒inorganic hybrid photocatalysts can effectively improve the light absorption capacity and separation efficiency of photogenerated electrons and holes in semiconductor photocatalysts. Herein, a CuPc/Bi<sub>2</sub>WO<sub>6</sub> Z-scheme heterojunction was successfully designed and used for CO<sub>2</sub> photoreduction. The separation of photogenerated electrons and holes is greatly enhanced because of the formation of a compact organic‒inorganic heterointerface and the built-in electric field between CuPc and Bi<sub>2</sub>WO<sub>6</sub>, which increases the photocatalytic CO<sub>2</sub> reduction efficiency. Moreover, the photosensitizer CuPc can effectively enhance the light absorption of Bi<sub>2</sub>WO<sub>6</sub>. The optimal 1CuPc/Bi<sub>2</sub>WO<sub>6</sub> composite exhibits the best photocatalytic performance, with a CO production rate of 2.95 µmol g<sup>−l</sup> h<sup>−1</sup>, which is three times greater than that of Bi<sub>2</sub>WO<sub>6</sub> under visible-light irradiation. This work provides a new idea for the construction of an organic‒inorganic photocatalytic system for CO<sub>2</sub> reduction.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 5","pages":"2239 - 2252"},"PeriodicalIF":5.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230239","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
Transforming excitation-dependent green to independent yellow emission in citric acid-derived carbon dots via melamine addition for high-performance warm pc-LEDs 通过添加三聚氰胺将柠檬酸衍生碳点中依赖激励的绿色发光转化为独立的黄色发光,用于高性能暖pc- led
IF 5.8 3区 材料科学
Carbon Letters Pub Date : 2025-05-25 DOI: 10.1007/s42823-025-00921-7
A. M. Nima, Sariga C. Lal, Subodh Ganesanpotti
{"title":"Transforming excitation-dependent green to independent yellow emission in citric acid-derived carbon dots via melamine addition for high-performance warm pc-LEDs","authors":"A. M. Nima,&nbsp;Sariga C. Lal,&nbsp;Subodh Ganesanpotti","doi":"10.1007/s42823-025-00921-7","DOIUrl":"10.1007/s42823-025-00921-7","url":null,"abstract":"<div><p>Designing long-wavelength emissive carbon dots (CDs) with high photoluminescence quantum yield (PL QY) is an inevitable component for lighting applications. However, it is still challenging to develop an efficient CDs with excitation-independent emission in long-wavelength regions. In this work, we developed an excitation-independent yellow emissive CD (y-CDs) with PL emission centered at 568 nm via a facile solvothermal treatment of citric acid and melamine using toluene as solvent. The synthesized, y-CDs contain a high degree of conjugated sp<sup>2</sup>-carbon domains (fused rings) with different surface groups, which serve as a center for photon absorption. The addition of melamine improves the degree of sp<sup>2</sup>-conjugated carbon domain and surface groups thereby switching the emission of y-CDs from excitation-dependent to excitation-independent emission with excellent PL QY of 80.2%, UV stability, and large Stoke shift. This work not only developed an efficient yellow emissive CD but also explored the possible mechanism of excitation-independent emission and used it for the development of phosphor-converted LEDs. The LED shows warm yellow light with CIE coordinates of (0.48, 0.49), CCT of 2983 K, excellent color purity of 94%, and high thermal stability. This study promotes the development of cost-effective and eco-friendly optoelectronic devices for smooth lighting 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 5","pages":"2269 - 2286"},"PeriodicalIF":5.8,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230543","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
N-doping of TiO2 for enhanced CO2 photocatalytic reduction and research on reaction mechanisms n掺杂TiO2增强CO2光催化还原及反应机理研究
IF 5.8 3区 材料科学
Carbon Letters Pub Date : 2025-05-18 DOI: 10.1007/s42823-025-00916-4
Jun Zhang, Wei Wang, Yue Yang, Yan Yan, Yongsheng Yan, Zhi Zhu
{"title":"N-doping of TiO2 for enhanced CO2 photocatalytic reduction and research on reaction mechanisms","authors":"Jun Zhang,&nbsp;Wei Wang,&nbsp;Yue Yang,&nbsp;Yan Yan,&nbsp;Yongsheng Yan,&nbsp;Zhi Zhu","doi":"10.1007/s42823-025-00916-4","DOIUrl":"10.1007/s42823-025-00916-4","url":null,"abstract":"<div><p>Photocatalytic reduction of CO<sub>2</sub> into fuels offers a promising avenue to tackle present energy challenges and mitigate global warming. At present, TiO<sub>2</sub> has been widely used in photocatalytic CO<sub>2</sub> reduction reactions, and element doping can optimize the band structure of TiO<sub>2</sub> to improve the efficiency of photocatalytic CO<sub>2</sub> reduction. In this work, TiO<sub>2</sub> doped with different content of N was prepared using TiN as the precursor through a simple one-step calcination method. Under optimized conditions, the optimal CO yield of the modified photocatalyst is 41.1 μmol g<sup>−1</sup> h<sup>−1</sup>, which is 8 times higher than that of p25 type TiO<sub>2</sub>. Density functional theory (DFT) calculations confirmed that N-doping can reduce the band gap of TiO<sub>2</sub> and decrease the Gibbs free energy of CO<sub>2</sub> reduction reaction. In-situ-XPS indicated that N-doping can enhance the activation of CO<sub>2</sub> by enriching photo generated electrons. Additionally, In-situ-FTIR spectra were employed to detect intermediates and track variations in the consumption of H<sub>2</sub>O and CO<sub>2</sub>, providing deeper insights into the mechanism responsible for enhancing efficiency. Our work addresses the deficiencies of the past and provides more detailed theoretical insights for the accelerated photocatalytic reduction of CO<sub>2</sub> by N-doping TiO<sub>2</sub>.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"35 5","pages":"2215 - 2226"},"PeriodicalIF":5.8,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230297","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
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