Graphdiyne coordinated CoMo-MOF formed S-scheme heterojunction boosting photocatalytic hydrogen production

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

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

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

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Abstract

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 sp and sp², 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.

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Graphdiyne 配位 CoMo-MOF 形成的 S 型异质结促进光催化制氢

随着光催化制氢技术的发展，光生载流子的有效传输仍然是影响光催化氢气进化性能的主要因素之一。本研究采用球磨法制备了石墨炔。将具有多面体结构的 CoMo-MOF 引入到石墨炔中，构建 S 型异质结，从而促进光生载流子的高效转移，提高氢气催化活性。石墨炔是一种具有可调带隙的新型碳材料，由 sp 和 sp2 混合合成，具有优异的导电性。CoMo-MOF 是一种多面体结构，可以提供更多的活性位点，促进光催化氢气进化。通过将 CoMo-MOF 与石墨二炔结合，成功改善了 CoMo-MOF 导电性差的弱点，并加快了光生载流子的迁移速度。石墨二炔/CoMo-MOF 的氢进化特性为 300 μmol，是石墨二炔的 19.61 倍，CoMo-MOF 的 9.03 倍。因此，S 型异质结的构建为电子转移提供了传输通道，提高了光生载流子分离的效率。这项工作为在碳材料中引入 MOFs 材料进行光催化氢气进化提供了新的设计思路。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.