Preparation of TiO2-WS2 heterojunction and its application in medical wastewater treatment
TiO2-WS2 heterojunction sample was in-situ synthesized through hydrothermal method.The structural composition and photoelectric properties of the samples were analyzed by XRD,Raman,XPS,SEM,TEM,HR-TEM,BET,UV-Vis DRS,PL and EIS techniques.The photodegradation performance of the samples was evaluated using ciprofloxacin as the target pollutant.The research results indicate that:TiO2-WS2 heterojunction sample can significantly improve the separation efficiency of photo-generated carriers,further resulting in excellent activity of TiO2-WS2 samples in photocatalytic degradation of ciprofloxacin.After 120 minutes of illumi-nation,the degradation rate of ciprofloxacin reached 94.8％,which is significantly improved compared to that of TiO2 and WS2 sam-ples.The free radical capture experiment showed that·OH and·O2-were the main active species in the photocatalytic degradation of ciprofloxacin on TiO2-WS2 samples.
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