期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 6, 期 4, 页码 1033-1041出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cy01193k
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资金
- National Natural Science Foundation of China [21271055, 21471040]
- Fundamental Research Funds for the Central Universities [HIT. IBRSEM. A. 201410]
- Open Project of the State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [QAK201304]
In this work, lanthanum (La) has been proven as an effective space charge layer modifier to promote efficient photogenerated charge carrier separation for ZnO:GaN solid solution photocatalysts with enhanced photocatalytic water-splitting performance. Photogenerated electron-hole pairs are effectively separated due to the increase of the thickness of the space charge layer after La-doping. The stable photocatalytic activity of the ZnO: GaN solid solution photocatalysts for overall water-splitting was remarkably enhanced by about 3.4 times when the La-doping concentration was 3% in atom ratio. The maximum apparent quantum efficiency of the La-doped (3% in atom percentage) ZnO: GaN solid solution photocatalyst for photocatalytic water oxidation was up to 14.5% at 350 nm without loading of any co-catalyst.
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