【摘 要】
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Development of photocatalytic materials able to profit from the whole spectrum of sun for efficient organic pollution removal and bacterial elimination is a fascinating strategy in environmental engineering.In current work,GO-TiO2/(Ca,Y)F2∶Tm,Yb,a full-sp
【机 构】
：
School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;T
论文部分内容阅读
Development of photocatalytic materials able to profit from the whole spectrum of sun for efficient organic pollution removal and bacterial elimination is a fascinating strategy in environmental engineering.In current work,GO-TiO2/(Ca,Y)F2∶Tm,Yb,a full-spectrum composite photocatalyst,was prepared via hydrothermal processing with TiO2/(Ca,Y)F2∶Tm,Yb particles deposited on the surface of graphene oxide (GO).The surface properties of GO-TiO2/(Ca,Y)F2∶Tm,Yb were characterized using vari-ous characterization techniques including X-ray diffraction(XRD),scanning electron microscopy (SEM),X-ray pho-toelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET) surface area analyzer.Besides,ultraviolet-visible (UV-Vis) diffuse reflectance spectroscopy,electron spin resonance (ESR) and other methods were used to systematically explore the photocatalytic mechanism of GO enhancement of TiO2/(Ca,Y)F2∶Tm,Yb.In photocat-alytic degradation study,the degradation rate of methyl orange (MO) was improved by 40％ when GO was added into the TiO2/(Ca,Y)F2∶Tm,Yb system.In addition,the presence of GO also improves the antibacterial ability of TiO2/(Ca,Y)F2∶Tm,Yb against Escherichia coli and Sta-phylococcus aureus.All results reveal high efficacy of GO-TiO2/(Ca,Y)F2∶Tm,Yb under full spectrum light irradia-tion,in which (Ca,Y)F2∶Tm,Yb and TiO2 can improve its utilization of full spectrum sunlight,and GO can enhance adsorption ability of dye and electron-hole pair differen-tiation ability of TiO2/(Ca,Y)F2∶Tm,Yb.
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