【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 the
【机 构】
：
State Key Laboratory of Chemical Resource Engineering,Beijing Key Laboratory of Energy Environmental
论文部分内容阅读
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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