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- Title
Noble-Metal-Free Janus-like Structures by Cation Exchange for Z-Scheme Photocatalytic Water Splitting under Broadband Light Irradiation.
- Authors
Yuan, Qichen; Liu, Dong; Zhang, Ning; Ye, Wei; Ju, Huanxin; Shi, Lei; Long, Ran; Zhu, Junfa; Xiong, Yujie
- Abstract
Z-scheme water splitting is a promising approach based on high-performance photocatalysis by harvesting broadband solar energy. Its efficiency depends on the well-defined interfaces between two semiconductors for the charge kinetics and their exposed surfaces for chemical reactions. Herein, we report a facile cation-exchange approach to obtain compounds with both properties without the need for noble metals by forming Janus-like structures consisting of γ-MnS and Cu7S4 with high-quality interfaces. The Janus-like γ-MnS/Cu7S4 structures displayed dramatically enhanced photocatalytic hydrogen production rates of up to 718 μmol g−1 h−1 under full-spectrum irradiation. Upon further integration with an MnO x oxygen-evolution cocatalyst, overall water splitting was accomplished with the Janus structures. This work provides insight into the surface and interface design of hybrid photocatalysts, and offers a noble-metal-free approach to broadband photocatalytic hydrogen production.
- Subjects
IRRADIATION; PHOTOCATALYSIS; SEMICONDUCTORS; ION exchange resins; JANUS
- Publication
Angewandte Chemie, 2017, Vol 129, Issue 15, p4270
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201700150