Facile synthesis of Ag-modified manganese oxide for effective catalytic ozone decomposition

Xiaotong Li; Jinzhu Ma; Changbin Zhang; Runduo Zhang; Hong He

doi:10.1016/j.jes.2018.12.008

Facile synthesis of Ag-modified manganese oxide for effective catalytic ozone decomposition

J Environ Sci (China). 2019 Jun:80:159-168. doi: 10.1016/j.jes.2018.12.008. Epub 2018 Dec 27.

Authors

Xiaotong Li¹, Jinzhu Ma², Changbin Zhang³, Runduo Zhang⁴, Hong He⁵

Affiliations

¹ State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, 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; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: jzma@rcees.ac.cn.
³ State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
⁴ State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China.
⁵ State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.

PMID: 30952334
DOI: 10.1016/j.jes.2018.12.008

Abstract

O₃ decomposition catalysts with excellent performance still need to be developed. In this study, Ag-modified manganese oxides (AgMnO_x) were synthesized by a simple co-precipitation method. The effect of calcination temperature on the activity of MnO_x and AgMnO_x 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%AgMnO_x for ozone decomposition was significantly enhanced due to the formation of the Ag_1.8Mn₈O₁₆ structure, indicating that this phase has excellent performance for ozone decomposition. The weight content of Ag_1.8Mn₈O₁₆ in the 8%AgMnO_x catalyst was only about 33.76%, which further indicates the excellent performance of the Ag_1.8Mn₈O₁₆ 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 Ag_1.8Mn₈O₁₆ structure. This study provides guidance for a follow-up study on Ag-modified manganese oxide catalysts for ozone decomposition.

Keywords: Ag-Hollandite; Ag-modified manganese oxide; Co-precipitation method; Ozone decomposition.

MeSH terms

Catalysis
Follow-Up Studies
Manganese Compounds / chemistry*
Models, Chemical*
Oxidation-Reduction
Oxides / chemistry*
Ozone / chemistry*
Silicon Dioxide
Silver / chemistry*
Temperature

Substances

Manganese Compounds
Oxides
Silver
manganese oxide
Ozone
Silicon Dioxide