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    Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts

    Access Status
    Fulltext not available
    Authors
    Liu, Shi Zhen
    Sun, Hongqi
    Liu, Shaomin
    Wang, Shaobin
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Liu, S.Z. and Sun, H. and Liu, S. and Wang, S. 2013. Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts. Chemical Engineering Journal. 214: pp. 298-303.
    Source Title
    Chemical Engineering Journal
    ISSN
    1385-8947
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/45709
    Collection
    • Curtin Research Publications
    Abstract

    Several graphene–titania composites (G–TiO2) were synthesized by a sol–gel method using titanium isopropoxide (or P25) as Ti-precursors and reduced graphene oxide (RGO). The structural, morphological, and physicochemical properties of the samples were thoroughly investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), UV–vis diffuse reflectance (UV–vis DRS), and thermogravimetric-differential thermal analysis (TG-DTA). A significant increase in light absorption to visible light was observed by G–TiO2 compared with that of naked TiO2. The photocatalytic activity of G–TiO2 in methylene blue bleaching under visible light (>430 nm) is much enhanced. G–TiO2 synthesized from titanium isopropoxide hydrolysis presented higher activity than that of G–TiO2(P25). Contribution of graphene on the enhancement of visible-light photocatalytic activity of the composite was discussed.

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