| Autor: |
Jiao, Jinqing, Wei, Yuechang, Chi, Kebin, Zhao, Zhen, Duan, Aijun, Liu, Jian, Jiang, Guiyuan, Wang, Yajun, Wang, Xilong, Han, Changcun, Zheng, Peng |
| Předmět: |
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| Zdroj: |
Energy Technology; Jun2017, Vol. 5 Issue 6, p877-883, 7p |
| Abstrakt: |
Photonic crystals can delay the propagation of light and increase its path length through a slow-light effect, which could have immense potential in improving photocatalytic conversion efficiencies. We employed a colloidal crystal template method to synthesize TiO2 photonic crystals (PC-TiO2), with platinum nanoparticles (Pt NPs) being deposited on the surface of the PC-TiO2 support at different loading amounts by the gas bubbling-assisted membrane reduction (GBMR) method. A series of Pt/PC-TiO2 photocatalysts with well-defined inverse-opal structure have uniform Pt NPs (about 2.5 nm) homogeneously dispersed on the pore walls of the support. The slow-light effect of photonic crystals effectively enhances the absorption efficiency of solar irradiation. Moreover, the Pt deposition significantly extends the spectral response and reduces the recombination rates of photoinduced electron-hole pairs. As a result, the Pt x/PC-TiO2 catalysts exhibit excellent photocatalytic activity for the reduction of CO2 in the presence of H2O. In addition, we propose a reaction mechanism for the photoreduction of CO2 under light irradiation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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