| Title: | Microwave-assisted synthesis of manganese oxide catalysts for total toluene oxidation |
| Author(s): | Wang P; Zhao J; Zhao Q; Ma X; Du X; Hao X; Tang B; Abudula A; Guan G; |
| Address: | "Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki 036-8560, Japan; College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China. Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki 036-8560, Japan. Energy Conversion Engineering Laboratory, Institute of Regional Innovation (IRI), Hirosaki University, 2-1-3 Matsubara, Aomori 030-0813, Japan; School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong 037009, PR China. College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China. Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China. School of Environmental Science and Technology, Guangdong University of Technology, Guangzhou 510006, PR China. Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki 036-8560, Japan; Energy Conversion Engineering Laboratory, Institute of Regional Innovation (IRI), Hirosaki University, 2-1-3 Matsubara, Aomori 030-0813, Japan. Electronic address: guan@hirosaki-u.ac.jp" |
| DOI: | 10.1016/j.jcis.2021.08.170 |
| ISSN/ISBN: | 1095-7103 (Electronic) 0021-9797 (Linking) |
| Abstract: | "Oxygen vacancy on the heterogeneous catalyst is of great importance to the catalysis of volatile organic compound (VOC) oxidation. Herein, microwave radiation with special energy-excitation is successfully utilized for the post-processing of a series of manganese oxides (MnO(x)) to generate oxygen vacancies. It is found that the MnO(x) catalyst with 60?ª+min of microwave radiation demonstrates higher activity for toluene oxidation with a T(50%) of 210?ª+ degrees C and a T(100%) of 223?ª+ degrees C, which is attributed to the higher concentration of oxygen vacancies derived from the rich phase interface defects resulted from the microwave radiation. Furthermore, the Mn-MW-60 catalyst possesses excellent thermal stability and water vapor tolerance even under 20?ª+vol% H(2)O atmospheres within 60?ª+h. In situ DRIFTS analysis verifies that both surface and lattice oxygen species simultaneously participate the oxidation process, and all reactions over different environments follows two different pathways. Meanwhile, it is proposed that those oxygen vacancies derived from microwave radiation could facilitate the rate-controlling step of opening the aromatic ring based on the electron back-donation, thereby leading to the increment of catalytic activity" |
| Keywords: | Catalytic oxidation In situ DRIFTS Manganese oxide catalyst Oxygen vacancy Toluene VOC removal; |
| Notes: | "PubMed-not-MEDLINEWang, Peifen Zhao, Jinggang Zhao, Qiang Ma, Xuli Du, Xiao Hao, Xiaogang Tang, Bing Abudula, Abuliti Guan, Guoqing eng 2021/09/09 J Colloid Interface Sci. 2022 Feb; 607(Pt 1):100-110. doi: 10.1016/j.jcis.2021.08.170. Epub 2021 Aug 30" |
