Synthesis of MnOx from pectin-driven sol-gel route for catalytic oxidation of toluene
Jinggang Zhao,
Peifen Wang,
Jing Wang,
Xiaoxun Ma,
Lei Shi,
Guangwen Xu,
Abuliti Abudula,
Guoqing Guan
Affiliations
Jinggang Zhao
Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki, 036-8560, Japan
Peifen Wang
College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
Jing Wang
School of Chemical Engineering, Northwest University, Xi'an, 710069, Shaanxi, China
Xiaoxun Ma
School of Chemical Engineering, Northwest University, Xi'an, 710069, Shaanxi, China
Lei Shi
Key Laboratory on Resources Chemicals and Materials of Ministry of Education, Shenyang University of Chemical Technology, Shenyang, 110142, China
Guangwen Xu
Key Laboratory on Resources Chemicals and Materials of Ministry of Education, Shenyang University of Chemical Technology, Shenyang, 110142, China
Abuliti Abudula
Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki, 036-8560, Japan
Guoqing Guan
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, 3-Bunkyocho, Hirosaki, 036-8561, Japan; Corresponding author. Energy Conversion Engineering Laboratory, Institute of Regional Innovation (IRI), Hirosaki University, 3-Bunkyocho, Hirosaki 036-8561, Aomori, Japan.
A novel green pectin-driven sol-gel with an auto-combustion route was successfully applied for the synthesis of manganese oxide catalysts, which exhibited superior catalytic performance for low-temperature combustion of toluene compared to those cases using manganese oxide catalysts synthesized by traditional citric acid and glycine-driven sol-gel routes. The characterization results showed that the MnOx-P catalyst synthesized by the present method exhibited a unique hierarchical mesoporous structure with lower crystallinity and smaller grain size, leading to abundant active species and defect structures. Comparing with the catalysts synthesized by those traditional sol-gel methods, the MnOx-P catalyst had excellent low-temperature reducible performance and better oxygen mobility, which is considered to be resulted from the specific interaction of chelation and calcination processes. In addition, the MnOx-P catalyst exhibited satisfactory long-term stability and water tolerance during catalytic toluene combustion process.
