Highly active OMS-2 for catalytic ozone decomposition under humid conditions
投稿时间:2018-09-10  
英文关键词:Cryptomelane type, Manganese oxide, Ozone decomposition, Nanofiber, Oxygen vacancy
基金项目:The authors appreciate the financial support from the National Natural Science Foundation of China (No. U1862102) and the Fundamental Research Funds for the Central Universities (XK1802-1, JD1819).
作者单位
Bo Peng State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China 
Wenjing Bao State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China 
Linlin Wei State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China 
Runduo Zhang State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China 
Zhoujun Wang State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China 
Zhichun Wang State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China 
Ying Wei State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China 
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英文摘要:
      Four kinds of cryptomelane-type octahedral molecular sieve (OMS)-2-X (the X represents the molar ratio of KMnO4/ MnAc2) were prepared as catalytic materials for ozone decomposition through a one-step hydrothermal reaction of KMnO4 and MnAc2, by changing their molar ratios. These samples were characterized by N2 adsorption–desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), temperature programmed reduction by H2 (H2-TPR) and X-ray photoelectron spectroscopy (XPS). Among them, the OMS-2-0.7 sample showed the best O3 conversion of 92% under high relative humidity (RH) of 90% and gas hourly space velocity of 585, 000 h-1. This was accordingly thought as a possible way for purifying ozone-containing waste gases under high RH atmospheres. The efficiency of ozone decomposition of the prepared OMS-2-X sample was found to be related to specific surface area, particle size, surface oxygen vacancies, and Mn3+ cation amounts. The one-step hydrothermal synthesis was shown to be a simple method to prepare the considerably active OMS-2 solids for ozone decomposition.
Bo Peng,Wenjing Bao,Linlin Wei,Runduo Zhang,Zhoujun Wang,Zhichun Wang,Ying Wei,2019.Highly active OMS-2 for catalytic ozone decomposition under humid conditions.Petroleum Science,16(4):912~919.
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