Effect of Ni-V loading on the performance of hollow anatase TiO2 in the catalytic combustion of dichloromethane  

作　　者：Bing Zhou Xixiong Zhang Yong Wang Jing Xie Kang Xi Ying Zhou Hanfeng Lu 

机构地区：[1]College of Chemical Engineering, Institute of Catalytic Reaction Engineering, Zhejiang University of Technology, Hangzhou 310014, China [2]College of Environment, Zhejiang University of Technology, Hangzhou 310014, China

出　　处：《Journal of Environmental Sciences》2019年第10期59-68,共10页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 21506194 and 21676255);the Provincial Natural Science Foundation of Zhejiang Province (No. Y16B070025);the Commission of Science and Technology of Zhejiang Province (Nos. 2017C03007 and 2017C33106)

摘　　要：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,H2 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℃.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(O2-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.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,H2 temperature-programmed reduction,pyridine-Fourier transform infrared spectroscopy（FTIR）characterization,and X-ray diffraction.Results showed that the original hollow anatase structure of pure Ti02 was well-maintained after Ni-V loading.The loading of NiO-VOx not only significantly improved the stability of pure Ti02 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℃.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（O2-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.

关 键 词：Catalytic combustion Dichloromethane(DCM) TIO2 CATALYST Ni-V/TiO2 CATALYST 

分 类 号：X[环境科学与工程]