Synthesis of ordered mesoporous manganese titanium composite oxide catalyst for catalytic ozonation

doi:10.1016/j.cjche.2017.09.019

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (9): 1862-1872.DOI: 10.1016/j.cjche.2017.09.019

• Catalysis, Kinetics and Reaction Engineering • Previous Articles Next Articles

Synthesis of ordered mesoporous manganese titanium composite oxide catalyst for catalytic ozonation

Chaofei Fei, Dan Li, Xian Mao, Yu Guo, Wenheng Jing

State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China

Received:2017-06-11 Revised:2017-09-13 Online:2018-10-17 Published:2018-09-28
Contact: Wenheng Jing,E-mail address:jingwh@njtech.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China (21676139), the Higher Education Natural Science Foundation of Jiangsu Province (15KJA530001), Research Fund of State Key Laboratory of Materials-Oriented Chemical Engineering (ZK201604) and the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Synthesis of ordered mesoporous manganese titanium composite oxide catalyst for catalytic ozonation

Chaofei Fei, Dan Li, Xian Mao, Yu Guo, Wenheng Jing

State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China

通讯作者: Wenheng Jing,E-mail address:jingwh@njtech.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (21676139), the Higher Education Natural Science Foundation of Jiangsu Province (15KJA530001), Research Fund of State Key Laboratory of Materials-Oriented Chemical Engineering (ZK201604) and the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Abstract

Abstract: In this account, highly ordered mesoporous MnO_x/TiO₂ composite catalysts with efficient catalytic ozonation of phenol degradation were synthesized by the sol-gel method. The surface morphology and properties of the catalysts were characterized by several analytical methods, including SEM, TEM, BET, XRD, FTIR, and XPS. Interestingly, Mn doping was found to improve the degree of order, and the ordered mesoporous structure was optimized at 3% doping. Meanwhile, MnO_x was highly dispersed in the ordered mesoporous materials to yield good catalytic ozonation performance. Phenol could completely be degraded in 20 min and mineralized at 79% in 60 min. Thus, the catalyst greatly improved the efficiency of degradation and mineralization of phenol when compared to single O₃ or O₃ + TiO₂. Finally, the reaction mechanism of the catalyst was discussed and found to conform to pseudo-first-order reaction dynamics.

Key words: Ordered mesoporous, MnO_x, Catalytic ozonation, Pseudo-first-order reaction

摘要： In this account, highly ordered mesoporous MnO_x/TiO₂ composite catalysts with efficient catalytic ozonation of phenol degradation were synthesized by the sol-gel method. The surface morphology and properties of the catalysts were characterized by several analytical methods, including SEM, TEM, BET, XRD, FTIR, and XPS. Interestingly, Mn doping was found to improve the degree of order, and the ordered mesoporous structure was optimized at 3% doping. Meanwhile, MnO_x was highly dispersed in the ordered mesoporous materials to yield good catalytic ozonation performance. Phenol could completely be degraded in 20 min and mineralized at 79% in 60 min. Thus, the catalyst greatly improved the efficiency of degradation and mineralization of phenol when compared to single O₃ or O₃ + TiO₂. Finally, the reaction mechanism of the catalyst was discussed and found to conform to pseudo-first-order reaction dynamics.

关键词: Ordered mesoporous, MnO_x, Catalytic ozonation, Pseudo-first-order reaction

Chaofei Fei, Dan Li, Xian Mao, Yu Guo, Wenheng Jing. Synthesis of ordered mesoporous manganese titanium composite oxide catalyst for catalytic ozonation[J]. Chin.J.Chem.Eng., 2018, 26(9): 1862-1872.

Chaofei Fei, Dan Li, Xian Mao, Yu Guo, Wenheng Jing. Synthesis of ordered mesoporous manganese titanium composite oxide catalyst for catalytic ozonation[J]. Chinese Journal of Chemical Engineering, 2018, 26(9): 1862-1872.

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Synthesis of ordered mesoporous manganese titanium composite oxide catalyst for catalytic ozonation

Synthesis of ordered mesoporous manganese titanium composite oxide catalyst for catalytic ozonation

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