Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 136, Issue -, Pages 824-831Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2014.09.100
Keywords
Nanocomposite; Multi-metal; Photoluminescence; Photocatalyst; Metaloxide
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A novel multi-metal nanocomposite, NiO center dot CeO2 center dot ZnO has been prepared by co-precipitation of their carbonates from aqueous solutions of the metal nitrates following calcination and annealing 5 h at 450 degrees C and 10 h at 950 degrees C. NiO center dot CeO2 center dot ZnO has been characterized by XRD, SEM, EDS, IR and PL spectra. The crystallite size of the as-synthesized sample varies in the range of 14-23 nm and those of the annealed sample in the range of 17-50 nm. Emissions of NiO center dot CeO2 center dot ZnO have been observed in UV (NBE emission) and visible region at different excitations. Excitation wavelength dependent PL behavior of NiO center dot CeO2 center dot ZnO has been observed in acetone at room temperature. This PL property is in disagreement with Kasha's rule of excitation wavelength dependence of emission spectrum. Photocatalytic as well as anti-bacterial activities were studied. (C) 2014 Elsevier B.V. All rights reserved.
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