ZnO 纳米线与硫掺杂 TiO2微／纳复合材料的制备及其光催化活性

摘要

采用水热法制备了ZnO纳米线与硫掺杂TiO2（ ZnO／S－TiO2）微／纳复合光催化剂，采用SEM、XRD和XPS等方法对复合光催化剂进行表征，探讨了硫掺杂量和煅烧温度对该复合催化剂光催化性能的影响．结果表明，ZnO微米线表面形成了粒径较为均一的纳米S－TiO2颗粒，硫掺杂TiO2中形成了Ti—O—S键；当硫掺杂量为0．8％（物质的量分数）并经500℃高温煅烧的复合光催化剂对菲的降解呈现出最好的光催化活性．%A microano-structured ZnO/S-doped TiO2 composite ( ZnO/S-TiO2 ) was successfully prepared by hy-drothermal method.The structure and morphology of the ZnO/S-TiO2 composite were characterized by SEM, XRD and XPS.The effect of dosage of sulfur doping into titanium dioxide and calcination temperature on photocatalytic activity of ZnO/S-TiO2 composite was discussed.The result indicated that Ti—O—S bond existed and homogeneous S doped TiO2 nanoparticles could be formed on the surface of ZnO.Under the conditions of 0.8%( molar ratio) of sulfur doping and the calcination temperature of 500℃, the synthesized photocatalyst exhibited the best photocata-lytic activity for degradation of phenanthrene.