Ultrathin Visible-Light-Driven Mo Incorporating In2O3-ZnIn2Se4 Z-Scheme Nanosheet Photocatalysts
- Peking Univ., Beijing (China); Chinese Academy of Sciences, Taiyuan (China); Chinese Academy of Sciences (CAS), Beijing (China)
- Peking Univ., Beijing (China)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Nankai Univ., Tianjin (China)
- Chinese Academy of Sciences, Taiyuan (China)
Inspired by natural photosynthesis, the design of new Z-scheme photocatalytic systems is very promising for boosting the photocatalytic performance of H2 production and CO2 reduction, however, till now the direct synthesis of efficient Z-scheme photocatalysts remains a grand challenge. Herein, we demonstrate an interesting Z-scheme photocatalyst can be constructed by coupling In2O3 and ZnIn2Se4 semiconductors based on the theoretical calculations. Experimentally, we make a class of ultrathin In2O3-ZnIn2Se4 (donated as In2O3-ZISe) spontaneous Z-scheme nanosheet photocatalysts for greatly enhancing the photocatalytic H2 production. Furthermore, we incorporate Mo atoms to the Z-scheme In2O3-ZISe nanosheet photocatalyst by forming Mo-Se bond, confirmed by X-Ray photoelectron spectroscopy, in which the formed MoSe2 works as co-catalyst of Z-scheme photocatalyst. As a consequence, such unique structure of In2O3-ZISe-Mo makes it exhibit 21.7 and 232.6 times higher photocatalytic H2 evolution activity than those of In2O3-ZnIn2Se4 nanosheet and In2O3 nanosheets, respectively. And In2O3-ZISe-Mo is also very stable for photocatalytic H2 production by showing almost no activity decay for 16 h test. Here, the ultraviolet-visible diffuse reflectance spectra, photoluminescence spectroscopy, transient photocurrent spectra and electrochemical impedance spectroscopy reveal that the enhanced photocatalytic performance of In2O3-ZISe-Mo is mainly attributed to its widened photoresponse range and effective carrier separation because of its special structure.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1508105
- Report Number(s):
- BNL--211568-2019-JAAM
- Journal Information:
- Advanced Materials, Journal Name: Advanced Materials Journal Issue: 5 Vol. 31; ISSN 0935-9648
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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