1Department of Chemistry & Centre of Excellence in Energy Research, International Research Centre, Sathyabama University, Jeppiaar Nagar, Chennai 600 119, India
2Department of Inorganic Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600 025, India
3Centre for Nanoscience and Nanotechnology, International Research Centre, Sathyabama University, Chennai 600 119, India
Adv. Mater. Lett., 2015, 6 (6), pp 518-526
DOI: 10.5185/amlett.2015.5776
Publication Date (Web): May 28, 2015
Copyright © IAAM-VBRI Press
E-mail: chennanml@yahoo.com
In-situ synthesis of ZnO and Nb2O5 composites was carried out in alkaline medium. The obtained composites were characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, diffuse reflectance UV-Vis spectrophotometer (DRS), Powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) surface area method, N2-sorption isotherms, Thermo gravimetric analysis (TGA), Particle size and Field emission scanning electron microscopy (FESEM/EDX). The synthesized composite was used as photocatalyst in the degradation of reactive red-198 (RR), methylene blue (MB) and 3-chloro phenol (3CP) under visible light irradiation. The catalytic activity and removal percentage of dye was determined by the spectrophotometric method, it indicates high percentage of degradation for the ZnO:Nb2O5 composite. The kinetic parameters were found to obey pseudo-first order oxidation reaction, which may be due to the fixed amount of the catalyst and concentration of the dye solution. The recycled and purified composites of ZnO:Nb2O5 was tested the catalytic activity and was compared with that of the fresh catalyst.
Zinc oxide, niobium oxide, photocatalyst, visible light, reactive red198, methylene blue, chlorophen.
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