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Current Nanoscience
ISSN (Print): 1573-4137
ISSN (Online): 1875-6786
Epub Full Text Article
DOI: 10.2174/1573413710666140129234519      Price:  $95









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

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Author(s): Fatemeh F. Bamoharram, Sudabeh Hashemi, Majid M. Heravi, Hamed Rashidi and Ali Ayati
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
Affiliation:
Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran.