Carbon Letters最新文献_第10页

Simultaneous electrochemical detection of ascorbic acid, dopamine and uric acid using Au decorated carbon nanofibers modified screen printed electrode 使用金修饰碳纳米纤维改性丝网印刷电极同时电化学检测抗坏血酸、多巴胺和尿酸

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-06-11 DOI: 10.1007/s42823-024-00759-5

P. Sakthivel, K. Ramachandran, K. Maheshvaran, T. S. Senthil, P. Manivel

{"title":"Simultaneous electrochemical detection of ascorbic acid, dopamine and uric acid using Au decorated carbon nanofibers modified screen printed electrode","authors":"P. Sakthivel, K. Ramachandran, K. Maheshvaran, T. S. Senthil, P. Manivel","doi":"10.1007/s42823-024-00759-5","DOIUrl":"10.1007/s42823-024-00759-5","url":null,"abstract":"<div><p>Gold nanoparticles (Au NPs) decorated carbon nanofibers (CNFs) have been prepared by an electrospinning approach and then carbonized. The prepared Au-CNFs were employed to modifying a screen printed electrode (SPE) for simultaneous determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA). Au NPs are uniformly dispersed on carbon nanofibers were confirmed by the structure and morphological studies. The modified electrodes were tested in cyclic voltammetry (CV), differential pulse voltammetry (DPV) and chronoamperometry (CA) to characterize their electrochemical responses. Compared to bare SPE, the Au-CNFs/SPE had a better sensing response to AA, DA, and UA. The electrochemical oxidation signal of AA, DA and UA are well separated into three distinct peaks with peak potential separation of 280 mV, 159 mV and 439 mV between AA-DA, DA-UA and AA-UA respectively in CV studies and the corresponding peak potential separation in DPV studies are 290 mV, 166 mV and 456 mV. The Au-CNFs/SPE has a wide linear response of AA, DA and UA in DPV analysis over the range of 5–40 µM (R<sup>2</sup> = 0.9984), 2–16 µM (R<sup>2</sup> = 0.9962) and 2–16 µM (R<sup>2</sup> = 0.9983) with corresponding detection limits of 0.9 µM, 0.4 µM and 0.3 µM at S/N = 3, respectively. The developed modified SPE based sensor exhibits excellent reproducibility, stability, and repeatability. The excellent sensing response of Au-CNFs could reveal to a promising approach in electrochemical sensor.</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":"34 9","pages":"2325 - 2341"},"PeriodicalIF":5.5,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141357270","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

Revolutionizing the sensing properties of green carbon dots for monitoring carbon dioxide and carbon monoxide at room temperature 革新绿色碳点在室温下监测二氧化碳和一氧化碳的传感特性

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-06-10 DOI: 10.1007/s42823-024-00751-z

Mohd Abdullah Sheikh, R. S. Chandok, Abida Bashir

{"title":"Revolutionizing the sensing properties of green carbon dots for monitoring carbon dioxide and carbon monoxide at room temperature","authors":"Mohd Abdullah Sheikh, R. S. Chandok, Abida Bashir","doi":"10.1007/s42823-024-00751-z","DOIUrl":"10.1007/s42823-024-00751-z","url":null,"abstract":"<div><p>Complex structure constituting of several layers of heteroatom-doped N-CDs are used as a main sensing film along with aluminum electrodes in conductometric gas sensing system for sensitive and selective monitoring of CO<sub>2</sub> and CO gases diluted with normal air, which are extensively prevalent in the atmosphere primarily due to the industrial revolution, locomotives, and numerous natural phenomena’s and the limit of detection (LOD) turned out to be 400 ppm and 30 ppm, respectively, with 20% relative humidity at 30 °C and pressure 1 (atm) which are good for healthy air quality checks. The sensor performance was satisfactory and bidirectional at ambient room temperature (30 °C) and pressure (1 atm) conditions but the relative humidity (50%) at 30 °C had a detrimental impact on the sensing responses, therefore intermittent heating at 80 °C for several minutes between the sensing responses was provided to the sensing chip or one should use gas filter membranes to block humidity, thereby maintaining its constant performance with great ease and accuracy. The cyclic voltammetry revealed well-defined oxidation and reduction peaks, with excellent stability and reversibility. In a nutshell, heteroatom-doped N-CDs’ nanocomposite material can revolutionize in a better environmental pollution monitoring by sensing gases in an extensively lesser response and recovery times.</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":"34 9","pages":"2245 - 2257"},"PeriodicalIF":5.5,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141365695","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

Preparation of whisker carbon nanotube composite paper by vacuum filtration method and its electrical heating performance 真空过滤法制备晶须碳纳米管复合纸及其电热性能

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-06-08 DOI: 10.1007/s42823-024-00750-0

Ru Chen, Xin Zhang, Jinghui Song, Xinmiao Cao, Guangtai Zhao

{"title":"Preparation of whisker carbon nanotube composite paper by vacuum filtration method and its electrical heating performance","authors":"Ru Chen, Xin Zhang, Jinghui Song, Xinmiao Cao, Guangtai Zhao","doi":"10.1007/s42823-024-00750-0","DOIUrl":"10.1007/s42823-024-00750-0","url":null,"abstract":"<div><p>This study delves into the potential application of whisker carbon nanotube (w-CNT) in terms of electrical heating performance, with a particular emphasis on its significance in high-efficiency electrothermal conversion applications. Meanwhile, a comparative study was conducted on traditional carbon nanotubes (T1 and T3) with different aspect ratios. A uniform and dense carbon nanotube paper (BP) was prepared using a vacuum filtration method, including single-layer (T1, T3 and w-CNT BP), double-layer gradient composite (T1/T3-g, w-CNT/T3-g), and mixed composite (T1/T3-m and w-CNT/T3-m). The thickness of each type of BP is approximately 100 µm. The results demonstrated that electrical conductivity and electrical heating performance of single-layer BPs follow the order of T1 > T3 > w-CNT. While, mixed composite BPs are superior to double-layer gradient composite BPs in electrical conductivity and thermal performance. Notably, w-CNT/T3-m BP exhibits excellent electrothermal performance. Under an applied voltage of 5 V, the surface temperature of w-CNT/T3-m BP reaches 190 ℃. When the voltage is increased to 6 V, the surface temperature rises by 150℃ within 10 s, reaching a steady-state temperature of 318 ℃. This excellent electrothermal performance can be attributed to the introduction of w-CNT, which has a perfect and defect free structure according to Raman analysis. In-depth analysis using X-ray diffraction (XRD) indicated a more complete and higher degree of crystallinity in the w-CNT structure. In summary, this study not only provides experimental and theoretical basis for the application of high-performance electrothermal materials based on carbon nanotubes, but also foreshadows their broad application prospects in the field of macroscopic materials.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 8","pages":"2127 - 2136"},"PeriodicalIF":5.5,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141368431","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

Au-loaded alkali metal-modified crystalline carbon nitride for photocatalytic nitrogen fixation 用于光催化固氮的金负载碱金属改性结晶氮化碳

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-06-04 DOI: 10.1007/s42823-024-00755-9

Mimi Luo, Baibing Wang, Jiahui Shao, Yupeng Yan, Guanjie Jiang, Qin Zhang, Yang Li

{"title":"Au-loaded alkali metal-modified crystalline carbon nitride for photocatalytic nitrogen fixation","authors":"Mimi Luo, Baibing Wang, Jiahui Shao, Yupeng Yan, Guanjie Jiang, Qin Zhang, Yang Li","doi":"10.1007/s42823-024-00755-9","DOIUrl":"10.1007/s42823-024-00755-9","url":null,"abstract":"<div><p>Crystalline heptazine carbon nitride (HCN) is an ideal photocatalyst for photocatalytic ammonia synthesis. However, the limited response to visible light has hindered its further development. As a noble metal, Au nanoparticles (NPs) can enhance the light absorption capability of photocatalysts by the surface plasmon resonance (SPR) effect. Therefore, a series of Au NPs-loaded crystalline carbon nitride materials (AH) were prepared for photocatalytic nitrogen fixation. The results showed that the AH displayed significantly improved light absorption and decreased recombination rate of photo-generated carriers owing to the introduction of Au NPs. The optimal 2AH (loaded with 2 wt% Au) sample demonstrated the best photocatalytic performance for ammonia production with a yield of 70.3 μmol g<sup>−1</sup> h<sup>−1</sup>, which outperformed that of HCN. This can be attributed to the SPR effect of Au NPs and alkali metal of HCN structure. These findings provide a theoretical basis for studying noble metal-enhanced photocatalytic activity for nitrogen fixation and offer new insights into advances in efficient photocatalysts.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 9","pages":"2291 - 2303"},"PeriodicalIF":5.5,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141259342","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

Electrochemical surface modification of carbon: a highly active metal-free electrocatalyst for hydrogen evolution reaction 碳的电化学表面改性：氢进化反应的高活性无金属电催化剂

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-06-04 DOI: 10.1007/s42823-024-00752-y

Bhavani Kalaidhasan, Lavanya Murugan, C. Jeyabharathi, R. Malini, S. Vengatesan, S. Vasudevan, S. Ravichandran

{"title":"Electrochemical surface modification of carbon: a highly active metal-free electrocatalyst for hydrogen evolution reaction","authors":"Bhavani Kalaidhasan, Lavanya Murugan, C. Jeyabharathi, R. Malini, S. Vengatesan, S. Vasudevan, S. Ravichandran","doi":"10.1007/s42823-024-00752-y","DOIUrl":"10.1007/s42823-024-00752-y","url":null,"abstract":"<div><p>In recent years, the search on fabrication of highly efficient, stable, and cost-effective alternative to Pt for the hydrogen evolution reaction (HER) has led to the development of new catalysts. In this study, we investigated the electrocatalytic HER activity of the Toray carbon substrate by creating defect sites in its graphitic layer through ultrasonication and anodization process. A series of Toray carbon substrates with active sites are prepared by modifying its surface through ultrasonication, anodization, and ultrasonication followed by anodization procedures at different time periods. The anodization process significantly enhances the surface wettability, consequently resulting in a substantial increase in proton flux at the reaction sites. As an implication, the overpotential for HER is notably reduced for the Toray carbon (TC-3U-10A), subjected to 3 min of ultrasonification followed by 10 min of anodization, which exhibits a significantly lower Tafel slope value of 60 mV/dec. Furthermore, the reactivity of the anodized surface for HER is significantly elevated, especially at higher concentrations of sulfuric acid, owing to the enhanced wettability of the substrate. The lowest Tafel slope value recorded in this study stands at 60 mV/dec underscoring the substantial improvements achieved in catalytic efficiency of the defect-rich carbon materials. These findings hold promise for the advancement of electrocatalytic applications of carbon materials and may have significant implications for various technological and industrial processes.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 9","pages":"2259 - 2267"},"PeriodicalIF":5.5,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141259114","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

The effect of heteroatoms and temperature ramping rate on pyrolysis of coal tar pitch for high value of β-resin 杂原子和升温速率对煤焦油沥青热解产生高β-树脂值的影响

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-06-03 DOI: 10.1007/s42823-024-00753-x

Seungjoo Park, Seon Ho Lee, Song Mi Lee, Gyusang Lee, Doo-Hwan Jung

{"title":"The effect of heteroatoms and temperature ramping rate on pyrolysis of coal tar pitch for high value of β-resin","authors":"Seungjoo Park, Seon Ho Lee, Song Mi Lee, Gyusang Lee, Doo-Hwan Jung","doi":"10.1007/s42823-024-00753-x","DOIUrl":"10.1007/s42823-024-00753-x","url":null,"abstract":"<div><p>Coal tar pitch is a raw material that can be made from various carbon materials such as activated carbon, carbon fiber, and artificial graphite through heat treatment. In particular, it is an important raw material used as a binder and impregnated pitch when manufacturing carbon composite materials. In order to improve the physical properties of such a carbon composite material, the content of β-resin is an important factor. Although β-resin plays the role of a binder, it also corresponds to fixed carbon, so it can determine the physical properties after carbonization. In this study, we compared the physical properties of coal tar pitch various temperature ramping rate, and found through Py-GC/MS analysis that intermediate materials were generated by heteroatoms such as oxygen and nitrogen. MALDI-TOF/MS analysis revealed that these intermediate materials overlapped with the molecular weight region of β-resin. Therefore, the content of β-resin is in the following order: 430–5 (12.8 wt%), 430–10 (10.2 wt%), and 430–2 (6.3 wt%), and when 430–5 is used as a binder, the highest density appeared at 1.75 g/cm<sup>3</sup>. However, such intermediate materials undergo thermal decomposition even at temperatures above 900 °C. As a result, after carbonization, 430–5 had a density of 1.60 g/cm<sup>3</sup>, which was similar or lower than that of 430–2 (1.72 → 1.63 g/cm<sup>3</sup>) and 430–10 (1.73 → 1.61 g/cm<sup>3</sup>). From these results, it is expected that if the heteroatom content is distributed in an appropriate amount and the heating rate is well controlled, it will be possible to maintain a high density even after carbonization while ensuring a high beta-resin content.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 9","pages":"2269 - 2278"},"PeriodicalIF":5.5,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141259456","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

Ester-based electrolytes for graphite solid electrolyte interface layer stabilization and low-temperature performance in lithium-ion batteries 用于锂离子电池中石墨固态电解质界面层稳定和低温性能的酯基电解质

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-30 DOI: 10.1007/s42823-024-00749-7

Chan-Gyo Kim, Suk Jekal, Jiwon Kim, Ha-Yeong Kim, Gyu-Sik Park, Yoon-Ho Ra, Jungchul Noh, Chang-Min Yoon

{"title":"Ester-based electrolytes for graphite solid electrolyte interface layer stabilization and low-temperature performance in lithium-ion batteries","authors":"Chan-Gyo Kim, Suk Jekal, Jiwon Kim, Ha-Yeong Kim, Gyu-Sik Park, Yoon-Ho Ra, Jungchul Noh, Chang-Min Yoon","doi":"10.1007/s42823-024-00749-7","DOIUrl":"10.1007/s42823-024-00749-7","url":null,"abstract":"<div><p>In this study, ester co-solvents and fluoroethylene carbonate (FEC) were used as low-temperature electrolyte additives to improve the formation of the solid electrolyte interface (SEI) on graphite anodes in lithium-ion batteries (LIBs). Four ester co-solvents, namely methyl acetate (MA), ethyl acetate, methyl propionate, and ethyl propionate, were mixed with 1.0 M LiPF<sub>6</sub> ethylene carbonate:diethyl carbonate:dimethyl carbonate (1:1:1 by vol%) as the base electrolyte (BE). Different concentrations were used to compare the electrochemical performance of the LiCoO<sub>2</sub>/graphite full cells. Among various ester co-solvents, the cell employing BE mixed with 30 vol% MA (BE/MA30) achieved the highest discharge capacity at − 20 °C. In contrast, mixing esters with low-molecular-weight degraded the cell performance owing to the unstable SEI formation on the graphite anodes. Therefore, FEC was added to BE/MA30 (BE/MA30-FEC5) to form a stable SEI layer on the graphite anode surface. The LiCoO<sub>2</sub>/graphite cell using BE/MA30-FEC5 exhibited an excellent capacity of 127.3 mAh g<sup>−1</sup> at − 20 °C with a capacity retention of 80.6% after 100 cycles owing to the synergistic effect of MA and formation of a stable and uniform inorganic SEI layer by FEC decomposition reaction. The low-temperature electrolyte designed in this study may provide new guidelines for resolving low-temperature issues related to LIBs, graphite anodes, and SEI layers.</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":"34 8","pages":"2113 - 2125"},"PeriodicalIF":5.5,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141195494","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

Graphitic carbon nitride film deposited with nitrogen-doped carbon nanoparticles as electrode for high-performance supercapacitors 用掺氮纳米碳粒子沉积的氮化石墨碳薄膜作为高性能超级电容器的电极

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-29 DOI: 10.1007/s42823-024-00754-w

Jun Zhu, Qiang Ma, Lirong Kong, Jianguo Dai, Keqiang Xu, Quanrun Chen, Zhiguo Zhao

引用次数: 0

Preparation of silicon carbide supported nickel catalyst with enhanced catalytic activity for ammonia decomposition 制备碳化硅支撑的镍催化剂，提高氨分解催化活性

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-24 DOI: 10.1007/s42823-024-00747-9

Xiantong Yu, Gideon Kofie, Fengxiang Yin, Jie Zhang, Qinjun Deng, Guoru Li, Yuhang Tan, Gongheng Zhang, Biaohua Chen

{"title":"Preparation of silicon carbide supported nickel catalyst with enhanced catalytic activity for ammonia decomposition","authors":"Xiantong Yu, Gideon Kofie, Fengxiang Yin, Jie Zhang, Qinjun Deng, Guoru Li, Yuhang Tan, Gongheng Zhang, Biaohua Chen","doi":"10.1007/s42823-024-00747-9","DOIUrl":"10.1007/s42823-024-00747-9","url":null,"abstract":"<div><p>Silicon carbide (β-SiC) was synthesized through an improved sol–gel method, then Ni/SiC catalysts were prepared using a hydrothermal method. The catalysts were characterized using TEM, H<sub>2</sub>-TPR, CO<sub>2</sub>-TPD and N<sub>2</sub>-TPD, etc. The results showed that the synthesized β-SiC had a large specific surface area, promoting the dispersion of Ni species and thus exposing more active sites. The interaction between Ni species and β-SiC contributed significantly to catalytic performance. Furthermore, the strong alkalinity of catalyst could adjust the bond energy of the active metal and N (M–N), which were conducive to desorption of the recombinant N<sub>2</sub> from the metal surface, promoting to ammonia decomposition. Among the Ni/SiC catalysts, 30Ni/SiC-700 synthesized with the Ni loading of 30 wt% and calcination temperature of 700 °C, exhibited the optimal ammonia conversion rate of 93.4% at 600 °C under the space speed of 30,000 mL∙g<sub>cat</sub><sup>−1</sup>∙h<sup>−1</sup>, and demonstrated a long-term stability, suggesting a very promising catalyst in ammonia decomposition.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 9","pages":"2233 - 2243"},"PeriodicalIF":5.5,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141099911","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

Graphdiyne coordinated CoMo-MOF formed S-scheme heterojunction boosting photocatalytic hydrogen production Graphdiyne 配位 CoMo-MOF 形成的 S 型异质结促进光催化制氢

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-22 DOI: 10.1007/s42823-024-00743-z

Lu Ding, Minjun Lei, Tian Wang, Jing Wang, Zhiliang Jin

{"title":"Graphdiyne coordinated CoMo-MOF formed S-scheme heterojunction boosting photocatalytic hydrogen production","authors":"Lu Ding, Minjun Lei, Tian Wang, Jing Wang, Zhiliang Jin","doi":"10.1007/s42823-024-00743-z","DOIUrl":"10.1007/s42823-024-00743-z","url":null,"abstract":"<div><p>With the development of photocatalytic hydrogen production technology, the effective transport of photogenerated carrier electrons is still one of the main factors affecting the performance of photocatalytic hydrogen evolution. In this work, graphdiyne was prepared by ball milling method. The CoMo-MOF with polyhedral structure was introduced into graphdiyne to construct S-scheme heterojunction to promote the efficient transfer of photogenerated carriers and enhanced hydrogen evolution activity. Graphdiyne is a new carbon material with adjustable band gap, which is synthesized from the hybrid of <i>sp</i> and <i>sp</i><sup>2</sup>, and has excellent electrical conductivity. CoMo-MOF is a polyhedral structure that can provide more active sites and promote photocatalytic hydrogen evolution. The weak point of poor conductivity in CoMo-MOF has been successfully improved by combining CoMo-MOF with graphdiyne, and the migration rate of photogenerated carriers has been accelerated. The hydrogen evolution property of graphdiyne/CoMo-MOF is 300 μmol, which is 19.61 times that of graphdiyne and 9.03 times that of CoMo-MOF. Therefore, the construction of S-scheme heterojunction provides a transport channel for electron transfer and improves the efficiency of photogenerated carrier separation. This work provides a new train of thought of design to introduce MOFs materials into carbon materials for photocatalytic hydrogen evolution.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 8","pages":"2099 - 2112"},"PeriodicalIF":5.5,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141112612","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