期刊
NANOSCALE
卷 10, 期 13, 页码 6039-6050出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr08388b
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资金
- Australian Research Council (ARC) [FT140101285]
- ARC [DP170103477, DE170100164, DE150100427, FT1401000834]
- RMIT University
- Ian Potter Foundation
- ARC Centre of Excellence for Nanoscale BioPhotonics [CE140100003]
Oxygen vacancies in inorganic semiconductors play an important role in reducing electron-hole recombination, which may have important implications in photocatalysis. Cuprous oxide (Cu2O), a visible light active p-type semiconductor, is a promising photocatalyst. However, the synthesis of photostable Cu2O enriched with oxygen defects remains a challenge. We report a simple method for the gram-scale synthesis of highly photostable Cu2O nanoparticles by the hydrolysis of a Cu(I)-triethylamine [Cu(I)-TEA] complex at low temperature. The oxygen vacancies in these Cu2O nanoparticles led to a significant increase in the lifetimes of photogenerated charge carriers upon excitation with visible light. This, in combination with a suitable energy band structure, allowed Cu2O nanoparticles to exhibit outstanding photo-activity in visible light through the generation of electron-mediated hydroxyl (OH center dot) radicals. This study highlights the significance of oxygen defects in enhancing the photocatalytic performance of promising semiconductor photocatalysts.
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