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

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• 作者：E. Luévano-Hipólito ; A. Martínez-de la Cruz
• 关键词：Oxides ; Semiconductors ; Chemical synthesis ; Sol–gel chemistry ; Catalytic properties
• 刊名：Research on Chemical Intermediates
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：42
• 期：5
• 页码：4879-4891
• 全文大小：1,225 KB
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• 作者单位：E. Luévano-Hipólito (1) <br> A. Martínez-de la Cruz (1) <br><br>1. CIIDIT, Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León, Ciudad Universitaria, 66451, San Nicolás de los Garza, N. L., Mexico <br>
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry<br>Catalysis<br>Physical Chemistry<br>Inorganic Chemistry<br>
• 出版者：Springer Netherlands
• ISSN：1568-5675

文摘

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 Nb>2b> 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.