Sol–gel synthesis and photocatalytic performance of ZnO toward oxidation reaction of NO

Sol–gel synthesis and photocatalytic performance of ZnO toward oxidation reaction of NO ZnO oxide was prepared by different routes of synthesis such as precipitation, solvothermal, solvothermal assisted with polyethylene glycol and the sol–gel method. The physical properties of the oxides were studied by X-ray powder diffraction, scanning electron microscopy, UV–Vis diffuse reflectance spectroscopy and adsorption–desorption N2 isotherms. The photocatalytic activity of ZnO samples was evaluated in the oxidation reaction of nitric oxide (NO). The conversion degree of NO reached by each sample used as photocatalyst was associated with their physical properties. By far the best performance was obtained with the sample prepared by sol–gel, in which a degree of conversion of about 70 % was reached. Beyond the elimination of NO, the selective formation of innocuous nitrate ions as the main product of reaction (>80 %) was also confirmed. The effect of the relative humidity and the charge of photocatalyst in the conversion degree of NO was analyzed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Sol–gel synthesis and photocatalytic performance of ZnO toward oxidation reaction of NO

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Publisher
Springer Netherlands
Copyright
Copyright © 2015 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-015-2327-4
Publisher site
See Article on Publisher Site

Abstract

ZnO oxide was prepared by different routes of synthesis such as precipitation, solvothermal, solvothermal assisted with polyethylene glycol and the sol–gel method. The physical properties of the oxides were studied by X-ray powder diffraction, scanning electron microscopy, UV–Vis diffuse reflectance spectroscopy and adsorption–desorption N2 isotherms. The photocatalytic activity of ZnO samples was evaluated in the oxidation reaction of nitric oxide (NO). The conversion degree of NO reached by each sample used as photocatalyst was associated with their physical properties. By far the best performance was obtained with the sample prepared by sol–gel, in which a degree of conversion of about 70 % was reached. Beyond the elimination of NO, the selective formation of innocuous nitrate ions as the main product of reaction (>80 %) was also confirmed. The effect of the relative humidity and the charge of photocatalyst in the conversion degree of NO was analyzed.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Oct 27, 2015

References

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