论文部分内容阅读
采用溶胶-凝胶浸渍提拉法在普通载玻片上制备了Zn掺杂TiO2薄膜,利用XRD、SEM对薄膜的结构、形貌进行了分析,并通过对亚甲基蓝(MB)溶液的降解率来评价其光催化活性。XRD结果表明:当掺入的锌含量达到1wt%时,除了锐钛矿型的TiO2,还出现了一种新相ZnTiO3的衍射峰,其结构为钙钛矿型,通过薄膜的SEM图像也能观察到ZnTiO3。通过对亚甲基蓝降解率的分析发现,掺锌量为1wt%的TiO2薄膜光催化活性较高,光照40min后对MB溶液的降解率高达98.7%。
Zn-doped TiO2 thin films were prepared on common glass slides by sol-gel dip-pull method. The structure and morphology of the films were analyzed by XRD and SEM, and the degradation rates of methylene blue (MB) solutions were evaluated Its photocatalytic activity. XRD results show that when the content of zinc is 1wt%, the diffraction peak of a new phase of ZnTiO3 besides anatase TiO2 appears, and its structure is perovskite. The SEM image of the film can also be ZnTiO3 was observed. Through the analysis of the degradation rate of methylene blue, it was found that the photocatalytic activity of TiO2 film doped with 1wt% Zn was higher than that of MB solution after 98% illumination for 40min.