Cu2O/BiVO4 heterostructures: Synthesis and application in simultaneous photocatalytic oxidation of organic dyes and reduction of Cr(VI) under visible light

Qing Yuan; Lang Chen; Miao Xiong; Jie He; Sheng Lian Luo; Chak Tong AU; Shuang Feng Yin

doi:10.1016/j.cej.2014.06.031

Cu₂O/BiVO₄ heterostructures: Synthesis and application in simultaneous photocatalytic oxidation of organic dyes and reduction of Cr(VI) under visible light

Qing Yuan, Lang Chen, Miao Xiong, Jie He, Sheng Lian Luo, Chak Tong AU, Shuang Feng Yin^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

285 Citations (Scopus)

Abstract

We synthesized Cu₂O/BiVO₄ composites by growing Cu₂O nanoparticles on BiVO₄ under mild condition. The optimized composite shows high photocatalytic efficiency in the simultaneous oxidation of organic dyes and reduction of Cr(VI) in neutral media. The XPS results confirm that the Cr(VI) adsorbed on Cu₂O/BiVO₄ was completely reduced to Cr(III). The photocatalyst can be used for the degradation of cationic or anionic dyes as well as a mixture of them under visible light irradiation. The photocatalytic activity of the composite can be ascribed to the heterojunctions between Cu₂O and BiVO₄, which facilitate the separation of photogenerated electrons and holes. The work demonstrates that the as-synthesized Cu₂O/BiVO₄ composite is a promising photocatalyst for the treatment of wastewater that contains organic dyes and Cr(VI) ions.

Original language	English
Pages (from-to)	394-402
Number of pages	9
Journal	Chemical Engineering Journal
Volume	255
DOIs	https://doi.org/10.1016/j.cej.2014.06.031
Publication status	Published - 1 Nov 2014

Scopus Subject Areas

Chemistry(all)
Environmental Chemistry
Chemical Engineering(all)
Industrial and Manufacturing Engineering

User-Defined Keywords

Bismuth vanadate
Cr(VI)
Cuprous oxide
Heterojunction
Photocatalysis

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10.1016/j.cej.2014.06.031

Cite this

@article{de69177f8ff842558f935ac95c339d6d,

title = "Cu2O/BiVO4 heterostructures: Synthesis and application in simultaneous photocatalytic oxidation of organic dyes and reduction of Cr(VI) under visible light",

abstract = "We synthesized Cu2O/BiVO4 composites by growing Cu2O nanoparticles on BiVO4 under mild condition. The optimized composite shows high photocatalytic efficiency in the simultaneous oxidation of organic dyes and reduction of Cr(VI) in neutral media. The XPS results confirm that the Cr(VI) adsorbed on Cu2O/BiVO4 was completely reduced to Cr(III). The photocatalyst can be used for the degradation of cationic or anionic dyes as well as a mixture of them under visible light irradiation. The photocatalytic activity of the composite can be ascribed to the heterojunctions between Cu2O and BiVO4, which facilitate the separation of photogenerated electrons and holes. The work demonstrates that the as-synthesized Cu2O/BiVO4 composite is a promising photocatalyst for the treatment of wastewater that contains organic dyes and Cr(VI) ions.",

keywords = "Bismuth vanadate, Cr(VI), Cuprous oxide, Heterojunction, Photocatalysis",

author = "Qing Yuan and Lang Chen and Miao Xiong and Jie He and Luo, {Sheng Lian} and AU, {Chak Tong} and Yin, {Shuang Feng}",

year = "2014",

month = nov,

day = "1",

doi = "10.1016/j.cej.2014.06.031",

language = "English",

volume = "255",

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journal = "Chemical Engineering Journal",

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TY - JOUR

T1 - Cu2O/BiVO4 heterostructures

T2 - Synthesis and application in simultaneous photocatalytic oxidation of organic dyes and reduction of Cr(VI) under visible light

AU - Yuan, Qing

AU - Chen, Lang

AU - Xiong, Miao

AU - He, Jie

AU - Luo, Sheng Lian

AU - AU, Chak Tong

AU - Yin, Shuang Feng

PY - 2014/11/1

Y1 - 2014/11/1

N2 - We synthesized Cu2O/BiVO4 composites by growing Cu2O nanoparticles on BiVO4 under mild condition. The optimized composite shows high photocatalytic efficiency in the simultaneous oxidation of organic dyes and reduction of Cr(VI) in neutral media. The XPS results confirm that the Cr(VI) adsorbed on Cu2O/BiVO4 was completely reduced to Cr(III). The photocatalyst can be used for the degradation of cationic or anionic dyes as well as a mixture of them under visible light irradiation. The photocatalytic activity of the composite can be ascribed to the heterojunctions between Cu2O and BiVO4, which facilitate the separation of photogenerated electrons and holes. The work demonstrates that the as-synthesized Cu2O/BiVO4 composite is a promising photocatalyst for the treatment of wastewater that contains organic dyes and Cr(VI) ions.

AB - We synthesized Cu2O/BiVO4 composites by growing Cu2O nanoparticles on BiVO4 under mild condition. The optimized composite shows high photocatalytic efficiency in the simultaneous oxidation of organic dyes and reduction of Cr(VI) in neutral media. The XPS results confirm that the Cr(VI) adsorbed on Cu2O/BiVO4 was completely reduced to Cr(III). The photocatalyst can be used for the degradation of cationic or anionic dyes as well as a mixture of them under visible light irradiation. The photocatalytic activity of the composite can be ascribed to the heterojunctions between Cu2O and BiVO4, which facilitate the separation of photogenerated electrons and holes. The work demonstrates that the as-synthesized Cu2O/BiVO4 composite is a promising photocatalyst for the treatment of wastewater that contains organic dyes and Cr(VI) ions.

KW - Bismuth vanadate

KW - Cr(VI)

KW - Cuprous oxide

KW - Heterojunction

KW - Photocatalysis

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JF - Chemical Engineering Journal

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