Efficient and selective oxidation of olefins and alcohols using nanoparticles of WO3-supported manganese oxides (W1↿em>x Mn
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- 作者：Mojtaba Amini
- 关键词：Nanoparticles ; Heterogeneous ; Oxidation ; Olefins and Alcohols
- 刊名：Korean Journal of Chemical Engineering
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：33
- 期：1
- 页码：126-131
- 全文大小：1,981 KB
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1. Department of Chemistry, Faculty of Science, University of Maragheh, P. O. Box 55181-83111, Maragheh, Iran - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Industrial Chemistry and Chemical Engineering
Catalysis
Materials Science
Biotechnology - 出版者：Springer New York
- ISSN：1975-7220
文摘
Nanoparticles of manganese oxide supported on tungsten oxide (WO3) were synthesized by an impregnation method using Mn(NO3)2 and Na2WO4 as a source of manganese and tungsten. Atomic absorption spectroscopy (AAS), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to characterize the physicochemical properties of compounds. Due to a highly dispersed state of manganese or insertion of manganese ions into the WO3 lattice, no manganese oxide peak was observed in the XRD patterns of the W1−x Mn x O3 nanoparticles. Investigation of W1−x Mn x O3 by AAS and EDX showed that the relative atomic abundance of Mn present in the bulk and on the surface of WO3 was 3.68% and 4.8% respectively. For the first time, the catalytic oxidation of olefins and alcohols, in the presence of these materials and hydrogen peroxide (H2O2) as a green oxidant at room temperature was studied. The recoverability and catalyst leaching of the W1−x Mn x O3 nanoparticles in epoxidation of styrene as a model reaction were also investigated.