期刊
INORGANIC CHEMISTRY FRONTIERS
卷 3, 期 9, 页码 1190-1197出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6qi00194g
关键词
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资金
- National Nature Science Foundation of China [21273203, 21374105]
- Zhejiang Provincial Natural Science Foundation [R15B010001, R12B040001, Q16B010001]
Development of TiO2-based photocatalysts capable of utilizing NIR light is very important for practical applications using the solar spectrum. The combination of upconversion nanocrystals (UCNs) with TiO2 is a promising route for activation of photocatalysts under NIR irradiation. Here we propose integration of dually sensitized UCNs with N-doped TiO2 with a core-shell-shell structure. In such composite photocatalysts, the core-shell UCNs exhibit enhanced UC emissions in response to two NIR bands and all the UC emissions can be utilized by the N-TiO2 shell. The doping manner of the UCN cores and the N-doping level of the TiO2 shell both have a significant effect on the photocatalytic activity. Our results suggest that rational design of the configuration of the component materials is a feasible way to improve the photocatalytic activity of such UCN/TiO2 nanocomposites.
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