Preyssler Heteropolyacid: A Green and Eco-friendly Catalyst in the Hydrothermal Synthesis of ZnO Nanostructures and their Applications in Photodegradation of Azo Dyes

ISSN: 1875-6786 (Online)
ISSN: 1573-4137 (Print)


Volume 10, 6 Issues, 2014


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Preyssler Heteropolyacid: A Green and Eco-friendly Catalyst in the Hydrothermal Synthesis of ZnO Nanostructures and their Applications in Photodegradation of Azo Dyes

Author(s): Fatemeh F. Bamoharram, Sudabeh Hashemi, Majid M. Heravi, Hamed Rashidi and Ali Ayati

Affiliation: Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran.

Abstract

ZnO nanostructures, including ZnO nano quasi-spheres and nanoplates, were synthesized hydrothermally, from the reaction of zinc acetate, catalyzed by Preyssler type heteropolyacid (H14 [NaP5W30O110]), at 140°C in 48 and 72 hours, respectively. The ZnO nanostructures were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy. The diameter of nano quasi-spheres, was about 5-10 nm. The nano plates had hexagonal shape showing diameter of 40-60nm. Photocatalytic degradation of Methylene blue and Congo red was effectively performed, using the above prepared ZnO nanostructures, achieving almost 70% decolorization, in short time. First order reaction constants were evaluated as 0.0745 and 0.0746 for Methylene blue and Congo red degradation reactions, respectively, concluding first order kinetics via this protocol.




Keywords: Azo dye, hydrothermal, photodegradation, preyssler, ZnO nano structure.

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Article Details

Volume: 10
Issue Number: 5
First Page: 736
Last Page: 742
Page Count: 7
DOI: 10.2174/1573413710666140129234519
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