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    Fabrication and photocatalytic activity of BiPO4@Ag3PO4 core/shell heterojunction

    Access Status
    Fulltext not available
    Authors
    Ren, Y.
    Li, Xin Yong
    Zhao, Q.
    Date
    2014
    Type
    Journal Article
    
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    Citation
    Ren, Y. and Li, X.Y. and Zhao, Q. 2014. Fabrication and photocatalytic activity of BiPO4@Ag3PO4 core/shell heterojunction. Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities. 35 (11): pp. 2435-2441.
    Source Title
    Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities
    DOI
    10.7503/cjcu20140266
    ISSN
    0251-0790
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/24141
    Collection
    • Curtin Research Publications
    Abstract

    ©, 2014, Higher Education Press. All right reserved. BiPO4@Ag3PO4 core/shell heterojuction photocatalyst was synthesized through a facile hydrothermal process followed by the ion-exchange method. The morphology, crystallinity, composition, and photophysical properties of the catalyst were systematically investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive X-ray analysis, UV-Vis diffuse reflectance spectrophotometer (DRS) and X-ray photoelectron spectroscopy (XPS). Meanwhile, Rhodamine B (RhB) was chosen as the target pollutant to evaluate the photocatalytic activity of BiPO4@Ag3PO4 photocatalyst under the visible light and simulated sunlight irradiation, respectively. The results show that RhB was almost totally degraded in 60 min under visible-light irradiation and in 40 min under sunlight irradiation, respectively. The BiPO4@Ag3PO4 core/shell heterojunction photocatalyst displayed enhanced photocatalytic activity against RhB, which is attributed to the effective charge separation by the core/shell heterojuction between the Ag3PO4 and BiPO4. Active species detection experiments proved that during the process of degradation of pollutants over the core/shell microrods, the main mechanism was the direct oxidation process by the photo-induced holes. Ag3PO4 shell can improve the absorption of the visible light effectively and also enhance the stability, dispersibility and photocatalytic activity of the photocatalyst. The BiPO4@AgPO4 photocatalysts show attractive potential applications in pollution control, water splitting and solar cell.

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