期刊
NEW JOURNAL OF CHEMISTRY
卷 43, 期 8, 页码 3609-3618出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nj06110f
关键词
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资金
- Chinese National Natural Science Foundation [21862002, 41663012]
- Key Scientific Research Projects of North Minzu University at 2017 [2017KJ16]
- Ningxia low-grade resource high value utilization and environmental chemical integration technology innovation team project, North Minzu University
- Major scientific project of North Minzu University [ZDZX201803]
- North Minzu University
In this study, V3+/VO2+/VO2+ was successfully employed as a redox mediator to modify CdS nanorods for the first time, and remarkable enhancement of efficient hydrogen evolution was obtained. Based on systematic investigations such as UV-vis diffuse reflectance spectra, photoluminescence spectra, transient photocurrent response, XRD, XPS, TEM, SEM, BET and electrochemical impedance spectroscopy to determine the inner reaction mechanism, the dramatically enhanced properties were mainly attributed to the coordinated effects of fast electron transfer. These effects are aided by the various valence states of the vanadate ion centers. Moreover, the effective redox couple strategy of FVO/CdS significantly promotes charge transfer. In addition, these novel composite materials not only exhibit high photoelectrochemical performance, but also effectively prevent photocorrosion of CdS. This work highlights the importance of the redox couple strategy for accelerating charge separation and opens a new avenue for the development of visible light-driven photocatalysts for H-2 production.
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