High Performance Photo-Catalyst Based on Nanosized ZnO–TiO2 Nanoplatelets for Removal of RhB Under Visible Light Irradiation
Nano-sized Zinc oxide–Titanium dioxide (ZnO–TiO2) nanocomposites containing well dispersed ZnO nanoparticles with an average crystal size of 57 nm has been successfully prepared via a hydrothermal method. FTIR characterization reveals that ZnO–TiO2 underwent oxygenation during the preparation of ZnO nanoparticle. The introduction of ZnO–TiO2 in the ZnO–TiO2 hybrid significantly improved the photocatalytic efficiency of ZnO in the degradation of Rhodamine B under visible light irradiation. The apparent reaction constant of ZnO–TiO2 is more times higher than that of pure ZnO, and the photocatalytic efficiency of ZnO–TiO2 remains high even after consecutive reactions. Results from the X-ray photoelectron spectroscopy, Brunauer-Emmett Teller surface area measurements, and electrochemical impedance spectroscopy analysis suggest that the enhancement in the photocatalytic activity of the ZnO–TiO2 hybrid comes from surface area provided by the nano-sized ZnO particles, significant dye adsorption from TiO2 template, and excellent electron reception and conduction of TiO2.
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Document Type: Research Article
Publication date: March 1, 2018
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