Abstract
Abstract TiO2 nanoparticles modified by pre-oxidized polyacrylonitrile were prepared, and characterized by Fourier transform infrared spectra (FTIR), Transmission electron microscopy (TEM), UV–vis diffuse reflectance spectra (UV–vis DRS) and X-ray photoelectron spectra (XPS). Their photocatalytic activities were evaluated by decolorization of an ordinary dye Reactive Brilliant Red X-3B in aqueous solution under visible light irradiation. Results show that pre-oxidized polyacrylonitrile can significantly improve visible light photocatalytic activity of TiO2 nanoparticles. FTIR indicate that pre-oxidized polyacrylonitrile possesses cyclized ladder structure with conjugated groups. UV–vis DRS shows that pre-oxidized polyacrylonitrile can absorb more visible light to enhance visible light photocatalytic activity of TiO2 nanocomposites.
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