Facile synthesis of Ag-modified manganese oxide for effective catalytic ozone decomposition |
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Authors: | Xiaotong Li Jinzhu M Changbin Zhang Runduo Zhang Hong He |
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Affiliation: | 1. State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China;2. State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;3. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;4. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract: | O3 decomposition catalysts with excellent performance still need to be developed. In this study, Ag-modified manganese oxides (AgMnOx) were synthesized by a simple co-precipitation method. The effect of calcination temperature on the activity of MnOx and AgMnOx catalysts was investigated. The effect of the amount of Ag addition on the activity and structure of the catalysts was further studied by activity testing and characterization by a variety of techniques. The activity of 8%AgMnOx for ozone decomposition was significantly enhanced due to the formation of the Ag1.8Mn8O16 structure, indicating that this phase has excellent performance for ozone decomposition. The weight content of Ag1.8Mn8O16 in the 8%AgMnOx catalyst was only about 33.76%, which further indicates the excellent performance of the Ag1.8Mn8O16 phase for ozone decomposition. The H2 temperature programmed reduction (H2-TPR) results indicated that the reducibility of the catalysts increased due to the formation of the Ag1.8Mn8O16 structure. This study provides guidance for a follow-up study on Ag-modified manganese oxide catalysts for ozone decomposition. |
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Keywords: | Ag-modified manganese oxide Ag-Hollandite Ozone decomposition Co-precipitation method |
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