• graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 674
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    • شماره تماس دبیرخانه رویداد: -
     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–tio2synthesized 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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