Synthetic effect of supports in Cu-Mn-doped oxide catalysts for promoting ozone decomposition under humid environment.

Autor: Li Y; Marine Engineering College, Dalian Maritime University, Dalian, 116026, China., Li H; Environmental Science and Engineering College, Dalian Maritime University, Dalian, 116026, China., Zhao B; Marine Engineering College, Dalian Maritime University, Dalian, 116026, China. zhaobg2008@163.com., Ma Y; Marine Engineering College, Dalian Maritime University, Dalian, 116026, China., Liang P; Marine Engineering College, Dalian Maritime University, Dalian, 116026, China., Sun T; Marine Engineering College, Dalian Maritime University, Dalian, 116026, China.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2023 Oct; Vol. 30 (46), pp. 102880-102893. Date of Electronic Publication: 2023 Sep 06.
DOI: 10.1007/s11356-023-29642-y
Abstrakt: The escalating levels of surface ozone concentration pose detrimental effects on public health and the environment. Catalytic decomposition presents an optimal solution for surface ozone removal. Nevertheless, catalyst still encounters challenges such as poisoning and deactivation in the high humidity environment. The influence of support on catalytic ozone decomposition was examined at a gas hourly space velocity of 300 L·g -1 ·h -1 and 85% relative humidity under ambient temperature using Cu-Mn-doped oxide catalysts synthesized via a straightforward coprecipitation method. Notably, the Cu-Mn/SiO 2 catalyst exhibited remarkable performance on ozone decomposition, achieving 98% ozone conversion and stability for 10 h. Further characterization analysis indicated that the catalyst's enhanced water resistance and activity could be attributed to factors such as an increased number of active sites, a large surface area, abundant active oxygen species, and a lower Mn oxidation state. The catalytic environment created by mixed oxides can offer a clearer understanding of their synergistic effects on catalytic ozone decomposition, providing significant insights into the development of water-resistant catalysts with superior performance.
(© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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