| Title: | Enhanced catalytic performance for VOCs oxidation on the CoAlO oxides by KMnO(4) doped on facile synthesis |
| Author(s): | Zhao Q; Liu Q; Song C; Ji N; Ma D; Lu X; |
| Address: | "Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, China; State Key Laboratory of Engines, Tianjin University, Tianjin, 300350, China. Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, China; State Key Laboratory of Engines, Tianjin University, Tianjin, 300350, China. Electronic address: liuql@tju.edu.cn. Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, China" |
| DOI: | 10.1016/j.chemosphere.2018.11.131 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "The MnO(x) was immobilized on the CoAl mixed oxides (CoAlO) derived from hydrotalcites with various anions (CO(3)(2-), Cl(-), NO(3)(-) and SO(4)(2-)) using the hydration and impregnation methods. The CoAlO oxides modified by KMnO(4) were calcined in air at 300?ª+ degrees C to obtain stable oxides, which could be used as catalysts for VOCs (acetone and ethyl acetate) oxidation. CoAlO with CO(3)(2-) and 30?ª+h of hydration time (CoAlO-C-Mn-30) exhibited a promising catalytic activity (T(90)?ª+=?ª+173?ª+ degrees C for acetone oxidation; T(90)?ª+=?ª+175?ª+ degrees C for ethyl acetate), highly superior to CoAlO without KMnO(4) modification. The improvement in acetone and ethyl acetate catalytic oxidation was ascribed to the Co(3+) and surface adsorbed oxygen species. The increase of Co(3+) in the CoAlO-C-Mn-30 oxide thanked to the self-decomposition of KMnO(4) and reducibility of Co(2+) in the CoAlO oxide during the hydration process. This was also confirmed by XRD and XPS characterization, which showed that Mn cations were enriched on the catalyst surface in the valences of +3 and +4. The catalytic activity of the catalyst remained unchanged in four cycles in the presence of 5.5 vol.% water vapor, which indicated a great potential for industrial application" |
| Keywords: | Acetates Acetone Adsorption Aluminum Hydroxide/chemistry Catalysis Cobalt/chemistry Magnesium Hydroxide/chemistry Oxidation-Reduction Oxides/*chemistry Potassium Permanganate/*chemistry Volatile Organic Compounds/*chemistry Acetone and ethyl acetate Catal; |
| Notes: | "MedlineZhao, Qian Liu, Qingling Song, Chunfeng Ji, Na Ma, Degang Lu, Xuebin eng England 2019/01/06 Chemosphere. 2019 Mar; 218:895-906. doi: 10.1016/j.chemosphere.2018.11.131. Epub 2018 Nov 23" |
