Synergistic mechanism of supported Mn–Ce oxide in catalytic ozonation of nitrofurazone wastewater

Enhanced Catalytic Ozonation by Mn–Ce Oxide-Loaded Al2O3 Catalyst for Ciprofloxacin Degradation

“…The ratio of Ce(III)/ Ce(IV) can be estimated in terms of the peak areas. 23 The results show that the atomic ratios of Ce(III)/Ce(IV) in Ce/ Al 2 O 3 and Mn−Ce/Al 2 O 3 catalysts are 0.79 and 0.83, respectively. Indeed, the Ce (III) content in Ce oxides plays an important role in determining the catalytic performance.…”

“…Ce­(IV) exhibited a sixfold split peak structure, corresponding to v , v ″, u 0 , u , u ″, and u ‴, respectively. The ratio of Ce­(III)/Ce­(IV) can be estimated in terms of the peak areas . The results show that the atomic ratios of Ce­(III)/Ce­(IV) in Ce/Al 2 O 3 and Mn–Ce/Al 2 O 3 catalysts are 0.79 and 0.83, respectively.…”

“…Due to the large specific surface area, mesoporous structure, high hardness, and high mechanical strength, the activated alumina-supported metal catalyst is one of the most used components in the field of catalytic ozonation process. − Especially, transitional-metal oxides, such as Fe, Cu, Mn, and Ce oxides, displayed great potential for ozone decomposition and reactive oxygen species (ROS) generation, subsequently improving the degradation efficiency of the organic pollutants. − Compared with single-component metal-loaded catalysts, the construction of multiple metal-loaded catalysts may achieve the synergic effect among the active components for the catalytic ozonation process. The development of the multiple metal-loaded catalysts is of great significance for the catalytic ozonation technology in treating antibiotic-containing wastewater.…”

Enhanced ozonation of vanillin catalyzed by highly efficient magnetic MnFe2O4/ZIF‐67 catalysts: Synergistic effects and mechanism insights

“…The loading of MnFe 2 O 4 promoted the generation of oxygen vacancies (OVs), resulting in a significant increase in O ads in the MnFe 2 O 4 /ZIF-67 composite catalysts, and the ratio of O ads /O lat was also significantly larger compared to several other materials, reaching 1.55 times. According to literature studies (N. Ma et al, 2022), in the present heterogeneous ozonation system, the lattice oxygen defects within the catalyst structure are the main active sites to catalytic ozonation process, and the surface hydroxylation is the basis and key condition for the catalytic reaction to take place; the larger the lattice oxygen vacancy defects are, the more significant the adsorption capacity of hydroxyl group in aqueous solution is, and the higher the catalytic activity is. So the significant increase in the content of O ads in the MnFe 2 O 4 /ZIF-67 material indicates that the larger lattice oxygen defects in the material provide more active sites for the catalytic reaction, which was conducive to the surface hydroxylation of the material and further promote the chain reaction that induces the decomposition of ozone, which was more effective in the removal of pollutant degradation.…”

Carbon Microspheres Composite PbO2 Anode to Enhance Electrode Activity for Degradation of Isopropylantipyrine: Kinetics and Mechanism

“…As one of the advanced oxidation technologies 12,13 with promising application prospects, many researchers have begun paying more attention to electrochemical oxidation technology. Electrochemical oxidation has a series of advantages such as high energy utilization efficiency and no secondary pollution, 14 making it a cleaner method with superior performance and great potential in degrading pollutants in wastewater.…”