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patterning alternate TiO_(2) and Cu_(2)O strips on a conductive substrate as film photocatalyst for Z-scheme photocatalytic water splitting

引用

Science Bulletin 2022年第23期67卷 2420-2427,M0004页

作者： Honglei Zhu Chao Zhen Xiangtao Chen Shun Feng Bo Li Yufei Du Gang Liu Hui-Ming Cheng Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Material Science&Engineering Northeastern UniversityShenyang 110819China Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Semiconductor heterostructures mediated by electrical conductors are very promising for Z-scheme photocatalytic water *** contrast to conventional particulate heterostructures,alternate TiO_(2)and Cu_(2)O film stripes patterned parallel on a fluorine-doped tin oxide(FTO) conductive substrate was fabricated as a model film photocatalyst to study the characteristics of the photogenerated charge transfer *** Z-scheme transfer process with an effective transport distance of up to 5 μm occurs only in regions distant from the TiO_(2)/Cu_(2)O strip edges through the FTO substrate from the *** contrast,the transfer of charge around their contact regions follows the conventional transfer process through the TiO_(2)/Cu_(2)O strip *** results indicate that the Z-scheme transfer process occurring in such a large region dominates the charge transfer processes in the TiO_(2)/FTO/Cu_(2)O pattern film ***,unlike the single component film,which is inactive for photocatalytic overall water splitting,the modified TiO_(2)/Cu_(2)O pattern film can induce photocatalytic overall water splitting at a stoichiometric H_(2)/O_(2) ratio close to 2:*** findings have significant implications in designing efficient heterostructures by employing a Z-scheme charge transfer process.

关键词： Photocatalyst pattern film Heterostructure Z-scheme Water splitting

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