Mesoporous γ-Al2 O3 Supported Mn-Ce-Co Ternary Oxides for the Efficient Plasma-Catalytic Oxidation of Formaldehyde

被引：1
作者：
Li, Chaozhong [1 ]
Wang, Danyang [1 ]
Fu, Yue [1 ]
Huang, Lei [2 ]
Yu, Dongqi [1 ,2 ]
机构：
[1] Liaoning Normal Univ, Sch Phys & Elect Technol, Dalian 116029, Peoples R China
[2] Shanghai Univ, Coll Sci, Res Ctr Nano Sci & Technol, Shanghai 200444, Peoples R China
来源：
NANO | 2023年 / 18卷 / 13期
关键词：
Plasma-catalytic; HCHO; mesoporous; active oxygen species; MnO2; MIXED OXIDES; REMOVAL; DECOMPOSITION; BENZENE; ROOM;
D O I：
10.1142/S1793292023501023
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Coupling low-temperature plasma technology with catalysts can significantly enhance air purification efficiency and mitigate the generation of secondary pollutants. In this study, mesoporous gamma-Al2O3 supported Mn-Ce-Co ternary oxides were introduced into a widely employed tubular dielectric barrier discharges (DBD) reactor for indoor air purification. The plasma-catalytic degradation of HCHO exhibited the following degradation efficiency order: Mn-Ce-Co/gamma-Al2O3 > Mn/gamma-Al2O3 > Mn-Ce/gamma-Al2O3 > Co/gamma-Al2O3 > gamma-Al2O3 > Ce/gamma-Al2O3 > Plasma. When compared to plasma treatment alone, the catalyst resulted in a remarkable 1.8-fold enhancement under conditions of 3.0kV, 25(degrees)C, 60% RH. Additionally, the concentrations of the by-products O-3 and NOx were significantly reduced by 88.2% and 93.3%, respectively. The synergistic interaction between Mn, Ce and Co oxides facilitated the formation and transportation of surface-reactive oxygen species, thereby contributing to the thorough oxidation of HCHO and organic intermediates during the plasma-catalytic process. Moreover, the high specific surface area offered by mesoporous materials enhanced the adsorption and catalytic activity towards HCHO.
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页数：15
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