Issue 35, 2013

Near-infrared photocatalysis of β-NaYF4:Yb3+,Tm3+@ZnO composites

Abstract

A novel near-infrared (NIR)-responsive photocatalyst, β-NaYF4:Yb3+,Tm3+@ZnO composites, was prepared by a two-step high temperature thermolysis method. In the NIR-responsive photocatalysis, β-NaYF4:Yb,Tm served as a NIR-to-UV upconverter and provided “UV light” or “necessary energy” to the ZnO catalyst. The energy transfer in the composites and the mixtures of β-NaYF4:Yb,Tm and ZnO was studied by using steady-state and dynamic fluorescence spectroscopy. The NIR photocatalytic activities were investigated by the decomposition of Rhodamine B. It was found that the energy transfer processes dominated the overall photocatalytic activities, and the generation of hydroxyl radicals was the origin of organic pollutant decomposition under NIR irradiation.

Graphical abstract: Near-infrared photocatalysis of β-NaYF4:Yb3+,Tm3+@ZnO composites

Supplementary files

Article information

Article type
Paper
Submitted
29 Jan 2013
Accepted
12 Jun 2013
First published
13 Jun 2013

Phys. Chem. Chem. Phys., 2013,15, 14681-14688

Near-infrared photocatalysis of β-NaYF4:Yb3+,Tm3+@ZnO composites

X. Guo, W. Song, C. Chen, W. Di and W. Qin, Phys. Chem. Chem. Phys., 2013, 15, 14681 DOI: 10.1039/C3CP52248B

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