Nature inspired ZnO/ZnS nanobranch-like composites, decorated with Cu(OH)(2) clusters for enhanced visible-light photocatalytic hydrogen evolution
- Authors
- PUTTASWAMY MADHUSUDAN; Madhusudan, Puttaswamy; Wang, Yu; Chandrashekar, Bananakere Nanjegowda; Wang, Weijun; Wang, Jingwei; Miao, Jun; Shi, Run; Liang, Yuxing; Mi, Guojun; Cheng, Chun
- Issue Date
- Sep-2019
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- ZnO/ZnS nanobranches; Cu(OH)(2) clusters; Hydrogen evolution; Visible-light irradiation; Photocatalysis
- Citation
- APPLIED CATALYSIS B-ENVIRONMENTAL, v.253, pp.379 - 390
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED CATALYSIS B-ENVIRONMENTAL
- Volume
- 253
- Start Page
- 379
- End Page
- 390
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/189824
- DOI
- 10.1016/j.apcatb.2019.04.008
- ISSN
- 0926-3373
- Abstract
- In this study, ZnO/ZnS hierarchical nanobranch like composite with Cu(OH)(2) clusters were designed via a simple facile hydrothermal process followed by precipitation reaction. Anchoring Cu(OH)(2) clusters on the ZnO/ZnS composite surface can shorten the charge migration distance, providing abundant active sites and extend the visible-light absorption. The effects of Cu(OH)(2) clusters loading on the photocatalytic application were investigated. The photocatalytic activities for hydrogen production were evaluated under visible-light (lambda > 400 nm) irradiation. It was found that coupling suitable weight ratio of Cu(OH)(2) cluster over the ZnO/ZnS nanobranches will enhance the photocatalytic hydrogen evolution by 46.5 and 13.7 times higher than pure Zn-5(CO3)(2)(OH)(6) and ZnO/ZnS, nanobranches respectively and an apparent quantum efficiency of 11.5% at lambda = 420 nm, and 14.7% under monochromatic LED light irradiation of 520 nm wavelength was achieved. This results show that construction of ZnO/ZnS nanobranches decorated with Cu(OH)(2) clusters can effectively improve the charge transfer and enhance the photocatalytic hydrogen production. The as-prepared ZnO/ZnS nanobranches decorated with Cu(OH)(2) clusters exhibits outstanding stability and recyclability. The mechanism for the enhanced hydrogen evolution is also discussed.
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