Near-infrared photocatalysis of β-NaYF4:Yb 3+,Tm3+@ZnO composites

Xingyuan Guo, Weiye Song, Changfeng Chen, Weihua Di, Weiping Qin

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101 Scopus citations

Abstract

A novel near-infrared (NIR)-responsive photocatalyst, β-NaYF 4: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. This journal is

Original languageEnglish
Pages (from-to)14681-14688
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume15
Issue number35
DOIs
StatePublished - 21 Sep 2013
Externally publishedYes

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