Ultrasonic-assisted synthesis of visible-light-driven TiO2/Bi2O3 nanocomposite photocatalysts: characterization, properties and azo dye removal application
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- 作者：Liang An ; Guanghui Wang ; Yang Cheng ; Lei Zhao…
- 关键词：TiO2 ; Bi2O3 ; Nanocomposites ; Ultrasonic ; Photocatalysis
- 刊名：Research on Chemical Intermediates
- 出版年：2015
- 出版时间：October 2015
- 年：2015
- 卷：41
- 期：10
- 页码：7449-7461
- 全文大小：813 KB
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Guanghui Wang (1)
Yang Cheng (1)
Lei Zhao (1)
Fang Gao (1)
Yongsheng Tian (1)
1. College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, 430081, People’s Republic of China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Catalysis
Physical Chemistry
Inorganic Chemistry - 出版者：Springer Netherlands
- ISSN：1568-5675
文摘
TiO2/Bi2O3 nanocomposites (Sonic-TiO2/Bi2O3) were synthesized via combination of thermohydrolysis and ultrasonic chemical precipitation techniques. For the sake of contrast, pure TiO2 nanoparticles (NPs) and conventional TiO2/Bi2O3 nanocomposites (Stir-TiO2/Bi2O3) were also prepared. XRD, FT-IR, FE-SEM, TEM, EDX and UV–Vis studies were adopted to determine the structural, chemical composition and optical properties of the as-prepared samples. The photocatalytic activities of the samples were evaluated by measuring the photo-degradation of Orange II in aqueous solution under visible light irradiation (λ ?nbsp;400 nm). The efficiencies towards OII degradation were determined to be 44.0, 81.8 and 94.7 % for pure TiO2 NPs, Stir-TiO2/Bi2O3 and Sonic-TiO2/Bi2O3, respectively. These results reveal that the loading of Bi2O3 can greatly improve visible light photocatalytic performance of TiO2, and the ultrasonic treatment can also improve photocatalytic performance of TiO2/Bi2O3 nanocomposites. Based on the experimental results, possible enhanced visible-light photocatalytic degradation mechanisms were also discussed. The present findings may provide a new approach to synthesize high efficiency TiO2/Bi2O3 nanocomposite photocatalysts. Keywords TiO2 Bi2O3 Nanocomposites Ultrasonic Photocatalysis