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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
2020-01
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
Volume87Pages:60-70
AbstractThe 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.
Department大气环境与污染控制实验室
KeywordManganese dioxide Ozone decomposition Fill percentage Oxygen vacancy Hydrothermal approach
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/45108
Collection大气环境与污染控制实验室
Recommended Citation
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.
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