Abstract
Conjugated polymer modification is one of the most promising methods for preparing TiO2-based visible-light-responsive photocatalysts. In this article, TiO2 nanoparticles modified by conjugated derivatives of polyisoprene (CDPIP) were prepared from TiO2/polyisoprene nanocomposites by the bromine addition reaction of polyisoprene and dehydrobromination reaction of the brominated polyisoprene. The visible light photocatalytic activities of as-prepared nanocomposites were evaluated using methyl orange as the model contaminant and two indoor fluorescent lamps with a 400 nm cutoff filter as the visible light source. TEM images show that a layer of CDPIP attaches on the surface of TiO2 nanoparticles. XPS, FTIR, and Raman spectra further reveal the conjugated structure of CDPIP. The results of XRD, UV–vis DRS, and PL spectra show that modification of CDPIP does not change the crystalline structure of TiO2, greatly improves the absorbance of the nanocomposites in the whole range of visible light, and obviously re...
Published Version
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