Photocatalytic Decolorization of Malachite Green in the Presence of Fe₃O₄/TiO₂/CuO Nanocomposites

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.

• Periodical: Advanced Materials Research (Volume 1123)
• Pages: 264-269
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1123.264
• Online since: August 2015
• Authors: Sarah A. Arifin, Shofianina Jalaludin, Rosari Saleh*
• Keywords: Magnetic Nanocomposite, Malachite Green, Photocatalytic

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