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

• 作 者: Bing Zhou Xixiong Zhang Yong W
• 机 构: College of Chemical Engineering, Institute of Catalytic Reaction Engineering, Zhejiang University of
• 出 处: 环境科学学报（英文版）
• 发表日期: 2019年10期
• 关键词: Catalytic combustion Dichloromethane (DCM) TiO2 catalyst Ni-V/TiO2 catalyst

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.