Effect of Ni–V loading on the performance of hollow anatase TiO2 in the catalytic combustion of dichloromethane
Bing Zhou , Xixiong Zhang , Yong Wang , Jing Xie , Kang Xi , Ying Zhou , Hanfeng Lu
DOI:10.1016/j.jes.2019.04.013
Received November 30, 2018,Revised , Accepted April 12, 2019, Available online April 25, 2019
Volume 31,2019,Pages 59-68
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°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 (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.
