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Effect of Morphology-based Defect Structure of ZnO Nanostructures in Photo-Degradation of Organic Dye

Published online by Cambridge University Press:  21 July 2014

Reza Shidpour*
Affiliation:
Department of chemistry, University of California, 900 University of ave., Riverside, CA 16066, U.S.A. Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran.
Manouchehr Vosoughi
Affiliation:
Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran.
Abdolreza Simchi
Affiliation:
Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran.
Faegheh Ghanbari
Affiliation:
Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran.
*
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Abstract

The fabrication of strong photocatalysts applied to the degradation of organic pollutants is necessary in environmental applications. In a single-stage method, acetate precursor and poly vinyl pyrolydine are used to produce ZnO nanostructures with various morphologies in annealing temperatures ranging from 300 °C to 900 oC. The physical properties of the prepared nanostructures were characterized by SEM, XRD and PL spectroscopy. The SEM images exhibit a variety of the as-prepared hexagonal zinc oxides including wires, rods, particles and porous network of welded particles of ZnO nanoparticles. The results of the photocatalytic degradation of methylene blue as an organic dye in aqueous suspension showed that the morphology of ZnO nanostructures influences on the photocatalytic efficiency of ZnO nanostructures, greatly. For the best result, the highest MB degradation occurs by ZnO nanowires within 16 minutes and in others samples, degradation of higher than 95 percent occurs within 20 minutes. The XRD and PL spectroscopy revealed neither VZn nor Oi are in all of samples but only VO, VO2− and Zni exist in ZnO nanostructures.

Type
Articles
Copyright
Copyright © Materials Research Society 2014 

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References

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