Abstract
Fe3O4/TiO2/CuO nanocomposites have been synthesized by sol-gel method and further used as photocatalyst for decolorization of malachite green from aqueous system under UV and visible light irradiation. X-ray diffraction confirmed the phase purity and crystallinity of nanocomposites. From UV-visible spectroscopy measurements it is found that the absorption peak of TiO2 nanoparticles is shifted towards longer wavelength after formation of nanocomposites indicating a modification of bandgap. The photocatalytic activity of TiO2 nanoparticles was enhanced by hybridization under visible light irradiation. The photodegradation of malachite green was significantly reduced by the addition of tert-butyl alcohol indicated that •OH radicals played an important role in the photocatalytic mechanism.
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