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  • improvement of visible light photocatalytic activity over flower-like biocl/biobr microspheres synthesized by reactable ionic liquids

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1058
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     biocl/biobr uniform flower-like composite photocatalysts had been successfully synthesized through a one-pot ethylene glycol (eg)-assisted solvothermal process in the presence of 1-hexadecyl-3-methylimidazolium chloride ([c16mim]cl) and 1-hexadecyl-3-methylimidazolium bromide ([c16mim]br) reactable ionic liquids. their structures, morphology, and optical properties were characterized by x-ray diffraction (xrd), x-ray photoelectron spectroscopy (xps), scanning electron microscopy (sem), energy-dispersive x-ray spectroscopy (eds) and uv–vis diffuse reflectance spectroscopy (drs). the drs analysis and high photocurrent suggested that biocl/biobr possessed absorption under visible light and was a benefit for the efficient generation and separation of the electron–hole pairs. photocatalytic activity experiment proved that biocl/biobr composites exhibited higher photocatalytic activity than single biocl and biobr for the degradation of rhodamine b (rhb) under visible light (λ > 400 nm). a possible photocatalytic mechanism based on the relative band positions of biocl and biobr had been proposed.

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