X射线光电子能谱
催化作用
分解
臭氧
扫描电子显微镜
热液循环
化学
空间速度
吸附
透射电子显微镜
分析化学(期刊)
程序升温还原
分子筛
材料科学
无机化学
化学工程
物理化学
纳米技术
有机化学
复合材料
工程类
选择性
作者
Bo Peng,Wenjing Bao,Lingbo Wei,Runduo Zhang,Zhou‐jun Wang,Zhichun Wang,Ying Wei
标识
DOI:10.1007/s12182-019-0335-5
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.
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