Preparation of Multi-Morphology TiO2 and Its Photocatalytic Degradation of Tetracycline
Photocatalysis is an essential approach for treating tetracycline(TC)contaminants,and photocatalytic materials play a crucial role in this process.TiO2 is a widely used photocatalyst,its morphology will significantly affect its catalytic performance.Therefore,urchin-like(TiO2-U),nanoparticle(TiO2-N)and hollow tubular(TiO2-T)TiO2 were prepared by hydrothermal method in this paper.The morphology and structure of the prepared catalysts were analyzed by XRD,SEM,XPS,UV-Vis DRS,N2 adsorption-desorption and EPR,and their degradation performance of TC were investigated.The results show that TiO2-U contains the greatest number of defects,and the synergistic effect of cationic and anionic defects narrow the band gap of TiO2-U,which reveal the best catalytic activity.The degradation rate of TC by TiO2-U can reach 100％at illumination 60 min.In addition,TiO2-U has a large specific surface area due to its distinctive urchin-like structure,which is conducive to the adsorption of TC and enhances the degradation efficiency.
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