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

• Published in: Environmental science and pollution research international Vol. 30; no. 46; pp. 102880 - 102893
• Main Authors: Li, Yunhe, Li, Hao, Zhao, Baogang, Ma, Yanming, Liang, Peiyuan, Sun, Tianjun
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2023; Springer Nature B.V
• Subjects: Ambient temperature; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Catalysis; Catalysts; Chemical synthesis; Copper; Copper - chemistry; Decomposition; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Humidity; Manganese; Manganese - chemistry; Mixed oxides; Oxidation; Oxidation-Reduction; Oxides - chemistry; Ozone; Ozone - chemistry; Public health; Relative humidity; Research Article; Silicon dioxide; Stability analysis; Synergistic effect; Valence; Waste Water Technology; Water Management; Water Pollution Control; Water resistance; spinel; CuMn; Oxidation states; Support modified; Water resistance; Catalytic decomposition; O; Oxygen vacancy; CuMn2O4 spinel
• ISSN: 1614-7499; 0944-1344; 1614-7499
• DOI: 10.1007/s11356-023-29642-y

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. Graphical Abstract