Synthesis of efficient Y-Bi2WO6/G visible light photocatalysts with high stability for pollutant degradation

For effective photocatalytic pollutant degradation on bismuth tungstate (Bi 2 WO 6 ), it is vital to enhance the photogenerated charge separation and the photochemical stability. Herein, we successfully fabricated yttrium (Y)-Bi 2 WO 6 /graphene (G) nanocomposites with a significantly enhanced visib...

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Published inEnvironmental science and pollution research international Vol. 28; no. 22; pp. 27864 - 27877
Main Authors Sun, Rui, Li, Risheng, Zhong, Shuang, Song, Ningning, Zhao, Zhiqing, Zhang, Shengyu
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.06.2021
Springer Nature B.V
Subjects
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Bismuth compounds
Earth and Environmental Science
Ecotoxicology
Electrochemical impedance spectroscopy
Electrochemistry
Electromagnetic absorption
Environment
Environmental Chemistry
Environmental Health
Environmental science
Graphene
Nanocomposites
Photocatalysis
Photochemicals
Photodegradation
Photoluminescence
Photons
Pollutants
Research Article
Rhodamine
Separation
Stability
Tungstates
Waste Water Technology
Water Management
Water Pollution Control
Yttrium
Degradation
Graphene
Yttrium doping
Bi
WO
Highly efficient
Rhodamine B
Visible light–driven photocatalysis
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Summary:For effective photocatalytic pollutant degradation on bismuth tungstate (Bi 2 WO 6 ), it is vital to enhance the photogenerated charge separation and the photochemical stability. Herein, we successfully fabricated yttrium (Y)-Bi 2 WO 6 /graphene (G) nanocomposites with a significantly enhanced visible light–driven photocatalytic ability to degrade Rhodamine B compared with the bare Bi 2 WO 6 . This is attributed to the remarkably improved visible light absorption capability and photogenerated charge separation after doping yttrium and subsequent coupling with graphene, as revealed by photoluminescence and electrochemical impedance spectroscopies. Moreover, trapping experiments were carried out to clarify that photogenerated ·O 2− and holes were the dominant oxidative species in the photocatalytic reaction. In addition, it was confirmed that the resulting composites maintained good photostability and chemical stability during recycling tests. Graphical abstract
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ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-021-12666-7