Tuning the fill percentage in the hydrothermal synthesis process to increase catalyst performance for ozone decomposition

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	Tuning the fill percentage in the hydrothermal synthesis process to increase catalyst performance for ozone decomposition
	Yang, Li; Ma, Jinzhu; Li, Xiaotong; He, Guangzhi; Zhang, Changbin; He, Hong
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2020-01
卷号	87 页码:60-70
关键词	Manganese dioxide Ozone decomposition Fill percentage Oxygen vacancy Hydrothermal approach
ISSN号	1001-0742
英文摘要	The performance of Ce-OMS-2 catalysts was improved by tuning the fill percentage in the hydrothermal synthesis process to increase the oxygen vacancy density. The Ce-OMS-2 samples were prepared with different fill percentages by means of a hydrothermal approach (i.e. 80%, 70%, 50% and 30%). Ce-OMS-2 with 80% fill percentage (Ce-OMS-2-80%) showed ozone conversion of 97%, and a lifetime experiment carried out for more than 20 days showed that the activity of the catalyst still remained satisfactorily high (91%). For Ce-OMS-2-80%, Mn ions in the framework as well as K ions in the tunnel sites were replaced by Ce4+, while for the others only Mn ions were replaced. O-2-TPD and H-2-TPR measurements proved that the Ce-OMS-2-80% catalyst possessed the greatest number of mobile surface oxygen species. XPS and XAFS showed that increasing the fill percentage can reduce the AOS of Mn and augment the amount of oxygen vacancies. The active sites, which accelerate the elimination of O-3, can be enriched by increasing the oxygen vacancies. These findings indicate that increasing ozone removal can be achieved by tuning the fill percentage in the hydrothermal synthesis process. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45108]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Yang, Li,Ma, Jinzhu,Li, Xiaotong,et al. Tuning the fill percentage in the hydrothermal synthesis process to increase catalyst performance for ozone decomposition[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2020,87:60-70.
APA	Yang, Li,Ma, Jinzhu,Li, Xiaotong,He, Guangzhi,Zhang, Changbin,&He, Hong.(2020).Tuning the fill percentage in the hydrothermal synthesis process to increase catalyst performance for ozone decomposition.JOURNAL OF ENVIRONMENTAL SCIENCES,87,60-70.
MLA	Yang, Li,et al."Tuning the fill percentage in the hydrothermal synthesis process to increase catalyst performance for ozone decomposition".JOURNAL OF ENVIRONMENTAL SCIENCES 87(2020):60-70.