Articles

Copper manganese oxides for formaldehyde catalytic oxidation at low temperature

  • CHEN Ying ,
  • HE Junhui ,
  • TIAN Hua ,
  • WANG Donghui ,
  • YANG Qiaowen
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  • 1. Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    2. School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;
    3. Research Institute of Chemical Defense, Beijing 100083, China

Received date: 2016-08-24

  Revised date: 2017-02-28

  Online published: 2017-12-16

Abstract

A series of copper manganese oxides are synthesized using a simple redox method by controlling the molar ratio of Cu and Mn and calcination temperature. The optimum conditions are determined by investigating the effects of synthesis conditions on crystal phase, morphology and catalytic activity of catalysts. The relationship between structure and activity of catalyst is revealed by combining X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and other characterizations. The results show that more oxygen vacancy generated by the addition of copper may promote the oxygen species mobile, which leads to a lower reduction temperature and strong ability of oxidation reduction. The amorphous type of copper manganese oxide with poor crystallinity is also beneficial to the increase of oxygen vacancy, which facilitates the catalytic oxidation of formaldehyde. The catalyst with copper and manganese molar ratio of 1:2 and calcination temperature of 300℃ exhibites the best catalytic performance and can completely decompose formaldehyde at 90℃.

Cite this article

CHEN Ying , HE Junhui , TIAN Hua , WANG Donghui , YANG Qiaowen . Copper manganese oxides for formaldehyde catalytic oxidation at low temperature[J]. Science & Technology Review, 2017 , 35(23) : 46 -51 . DOI: 10.3981/j.issn.1000-7857.2017.23.007

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