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

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

doi:10.1039/c3cp52248b

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

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

Research output: Contribution to journal › Article › peer-review

108 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 language	English
Pages (from-to)	14681-14688
Number of pages	8
Journal	Physical Chemistry Chemical Physics
Volume	15
Issue number	35
DOIs	https://doi.org/10.1039/c3cp52248b
State	Published - 21 Sep 2013
Externally published	Yes

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T1 - Near-infrared photocatalysis of β-NaYF4:Yb 3+,Tm3+@ZnO composites

AU - Guo, Xingyuan

AU - Song, Weiye

AU - Chen, Changfeng

AU - Di, Weihua

AU - Qin, Weiping

PY - 2013/9/21

Y1 - 2013/9/21

N2 - 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

AB - 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

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

Abstract

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