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Research Article | Open Access

Annealing effects on the structural and optical properties of ZnO nanoparticles with PVA and CA as chelating agents

A. N. MALLIKA( )A. Ramachandra REDDYK. Venugopal REDDY
Department of Physics, Materials Science Laboratory, National Institute of Technology, Warangal-506004, Telangana, India
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The effects of annealing temperatures and chelating agents on the structural and optical properties of ZnO nanoparticles were investigated. The average particle size of ZnO nanoparticles increased with increase of annealing temperatures. The decrease of the full width at half maximum (FWHM) with increasing annealing temperatures inferred increase of particle/grain growth. The grain sizes were also observed to be increased with increase of annealing temperatures. From the absorption spectra of the samples, the absorption was red-shifted and the energy band gap was blue-shifted with increase of annealing temperatures. A sharp UV emission peak was observed and the intensity of this peak increased with annealing temperatures corresponding to the high crystallinity in the samples. At high annealing temperature of 700 ℃, ZnO exhibited a less intense deep level emission. This negligible deep level emission was attributed to the oxygen vacancies created at higher annealing temperatures.


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Journal of Advanced Ceramics
Pages 123-129
Cite this article:
MALLIKA AN, REDDY AR, REDDY KV. Annealing effects on the structural and optical properties of ZnO nanoparticles with PVA and CA as chelating agents. Journal of Advanced Ceramics, 2015, 4(2): 123-129.








Web of Science






Received: 14 November 2014
Revised: 30 December 2014
Accepted: 24 January 2015
Published: 30 May 2015
© The author(s) 2015

Open Access: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.