Enhancement of photoelectrochemical activity of Fe2O3 nanowires decorated with carbon quantum dots |
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Authors: | Xin Xie Yunhua Yang Yong-Hao Xiao Xiaomo Huang Qingshan Shi Wei-De Zhang |
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Affiliation: | 1. School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, People’s Republic of China;2. Guangdong Demay Biological Technology Co., Ltd, Guangzhou, 510663, People’s Republic of China |
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Abstract: | Owing to its up-conversion photoluminescence, photo-induced electron transfer property, and excellent conductivity, carbon quantum dots (CQDs) have been established as effective sensitizers in combination with Fe2O3 nanowires for enhancing the catalytic activity of photoelectrochemical water oxidation. In comparison to pristine Fe2O3 nanowires, Fe2O3 nanowires decorated with CQDs demonstrate 27 orders of magnitude increase in photocurrent density at 0.23 V vs. Ag/AgCl. The mechanism of enhanced photoelectrochemical activity of CQDs/Fe2O3 composite was also investigated. Thereby, it is confirmed that the enhanced optical absorption, accelerated interfacial charge carrier transfer and effective separation of photogenerated electron-hole pairs induced by CQDs decoration account for the enhancement of CQDs/Fe2O3 nanowire arrays in photoelectrochemical application. |
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Keywords: | Nanowires Quantum dots Photoelectrochemical |
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