期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 84, 期 -, 页码 59-68出版社
SCIENCE PRESS
DOI: 10.1016/j.jes.2019.04.013
关键词
Catalytic combustion; Dichloromethane (DCM); TiO2 catalyst; Ni-V/TiO2 catalyst
资金
- National Natural Science Foundation of China [21506194, 21676255]
- Provincial Natural Science Foundation of Zhejiang Province [Y16B070025]
- Commission of Science and Technology of Zhejiang Province [2017C03007, 2017C33106]
A catalyst based on mixed V-Ni oxides supported on TiO2 (Ni-V/TiO2) was obtained using the sol-gel method. Its catalytic performance relative to dichloromethane (DCM) degradation was investigated. Characterization and analysis were conducted using transmission electron microscopy, H-2 temperature-programmed reduction, pyridine-Fourier transform infrared spectroscopy (FTIR) characterization, and X-ray diffraction. Results showed that the original hollow anatase structure of pure TiO2 was well-maintained after Ni-V loading. The loading of NiO-VOx not only significantly improved the stability of pure TiO2 but also inhibited the formation of the by-product monochloromethane (MCM). Among the series of Ni-V/TiO2 catalysts, 4%Ni-V/TiO2 possessed the highest catalytic activity, with 90% DCM conversion at only 203 degrees C. No by-products and no significant changes in the catalytic activity were observed during combustion of DCM after 100 hr of a continuous stability test. Furthermore, thermogravimetric analysis (O-2-TG) and energy dispersive spectrometer (EDS) characterization of the used 4%Ni-V/TiO2 catalyst revealed that no coke deposition or chlorine species could be detected on the catalyst surface. (C) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
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