Affiliation:
1. Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People's Republic of China School of Chemistry and Materials Science Heilongjiang University Harbin 150080 P. R. China
2. School of Materials Sun Yat‐sen University Shenzhen 518107 P. R. China
3. College of Material Science and Chemical Engineering Harbin Engineering University Harbin 150001 P. R. China
4. Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 P. R. China
Abstract
AbstractThe coupling of photocatalytic hydrogen production and selective oxidation of benzylamine is a topic of significant research interest. However, enhancing the bifunctional photocatalytic activity in this context is still a major challenge. The construction of Z‐scheme heterojunctions is an effective strategy to enhance the activity of bifunctional photocatalysts. Herein, a p‐n type direct Z‐scheme heterojunction CuS/TiO2 is constructed using metal‐organic framework (MOF)‐derived TiO2 as a substrate. The carrier density is measured by Mott‐Schottky under photoexcitation, which confirms that the Z‐scheme electron transfer mode of CuS/TiO2 is driven by the diffusion effect caused by the carrier concentration difference. Benefiting from efficient charge separation and transfer, photogenerated electrons, and holes are directedly transferred to active oxidation and reduction sites. CuS/TiO2 also exhibits excellent bifunctional photocatalytic activity without noble metal cocatalysts. Among them, the H2 evolution activity of the CuS/TiO2 is found to be 17.1 and 29.5 times higher than that of TiO2 and CuS, respectively. Additionally, the yields of N‐Benzylidenebenzylamine (NBB) are 14.3 and 47.4 times higher than those of TiO2 and CuS, respectively.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
1 articles.
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