Enhanced photocatalytic performance of Cu2O/MoS2/ZnO composites on Cu mesh substrate for nitrogen reduction

Qian Su; Weiwen Wang; Zisheng Zhang; Jihai Duan

doi:10.1088/1361-6528/abf378

Enhanced photocatalytic performance of Cu₂O/MoS₂/ZnO composites on Cu mesh substrate for nitrogen reduction

Nanotechnology. 2021 Apr 26;32(28). doi: 10.1088/1361-6528/abf378.

Authors

Qian Su¹, Weiwen Wang¹, Zisheng Zhang^{1

2}, Jihai Duan¹

Affiliations

¹ College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China.
² Department of Chemical and Biological Engineering, University of Ottawa, Ontario, KIN 6N5, Canada.

PMID: 33784642
DOI: 10.1088/1361-6528/abf378

Abstract

Cu₂O nanoparticles and MoS₂nanoflowers decorated with ZnO nanospheres were successfully co-deposited on Cu mesh via a mild electrodeposition method to build a dual direct Z-scheme heterostructure. The prepared materials can effectively synthesize ammonia with N₂and H₂O in the liquid membrane reactor under simulated visible light. The results indicate that 3D nanomaterials exhibit better performance compared to a pure semiconductor due to the synergistic effect of enhanced visible light absorption, longer photogenerated carrier lifetime and the specific charge transfer path of dual direct Z-scheme structure. Meanwhile, the hydrophilicity of Cu₂O/MoS₂/ZnO rapidly makes the surface of the catalyst wet when it participates in the photo reaction, which promotes the contact between the reactant and exciton. This work proposes the electron transfer and possible reaction mechanism corresponding to the designed catalyst, which can provide a reference for other photocatalytic applications using a semiconductor heterojunction as a catalyst.

Keywords: 3D; dual direct Z-scheme heterostructure; nitrogen reduction; photoelectrochemical properties.