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Issue 9, 2016
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Coating a N-doped TiO2 shell on dually sensitized upconversion nanocrystals to provide NIR-enhanced photocatalysts for efficient utilization of upconverted emissions

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Abstract

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.

Graphical abstract: Coating a N-doped TiO2 shell on dually sensitized upconversion nanocrystals to provide NIR-enhanced photocatalysts for efficient utilization of upconverted emissions

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Publication details

The article was received on 21 Jun 2016, accepted on 13 Jul 2016 and first published on 15 Jul 2016


Article type: Research Article
DOI: 10.1039/C6QI00194G
Inorg. Chem. Front., 2016,3, 1190-1197

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    Coating a N-doped TiO2 shell on dually sensitized upconversion nanocrystals to provide NIR-enhanced photocatalysts for efficient utilization of upconverted emissions

    K. Wang, W. Qincheng, F. Wang, S. Bai, S. Li and Z. Li, Inorg. Chem. Front., 2016, 3, 1190
    DOI: 10.1039/C6QI00194G

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