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Enhanced visible light catalysis activity of CdS-sheathed SrAl2O4:Eu2+,Dy3+ nanocomposites

Abstract

SrAl2O4:Eu2+,Dy3+ long afterglow phosphors with one-dimensional nanostructures were synthesized by a hydrothermal method followed by post-annealing, and subsequently CdS was uniformly coated on their surfaces by a sol-gel approach. The nanocomposite system can enhance significantly the photocatalytic activity for the degradation of methyl orange and hexavalent chromium under ultraviolet and visible light irradiation. After the modification treatment with a 1:2 molar ratio of CdS to SrAl2O4:Eu2+,Dy3+ nanophosphors, the degradation rate of methyl orange can increase by 2.5 times and reach a maximum of 96.3% under visible light illumination for 30 min. The enhancement of photocatalytic activity originates from the improvement of light use efficiency due to the hole migration from SrAl2O4:Eu2+,Dy3+ phosphor to CdS semiconductor and the reutilization of SrAl2O4:Eu2+,Dy3+ luminescence.

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Publication details

The article was received on 25 Mar 2018, accepted on 10 May 2018 and first published on 11 May 2018


Article type: Paper
DOI: 10.1039/C8DT01151F
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Enhanced visible light catalysis activity of CdS-sheathed SrAl2O4:Eu2+,Dy3+ nanocomposites

    Y. Xiao, B. Luo, B. Cheng, Q. Huang, Y. Ye, L. Fang, L. Zhou and S. Lei, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT01151F

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