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 Nanostructure

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Article Details

Volume: 10
First Page: 1
Last Page: 7
Page Count: 7
DOI: 10.2174/1573413710666140129234519
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