ZnO∶Fe薄膜的光催化活性研究

Study on Photocatalytic Activities of ZnO∶Fe Films

以二水合乙酸锌、无水乙醇、二乙醇胺为主要原料,采用溶胶-凝胶法在玻璃基片上沉积制备出了不同Fe掺杂浓度的ZnO薄膜。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和紫外-可见分光光度仪(UV-Vis)等对样品的结构和形貌等进行了测试和表征,并研究了不同掺杂浓度的ZnO∶Fe薄膜对亚甲基蓝降解率的影响。结果表明:所制得的ZnO∶Fe薄膜致密、均匀。ZnO∶Fe薄膜的光催化活性优于未掺杂的ZnO薄膜。Fe最佳掺杂浓度为1.5mol%,这时所形成的光催化剂经150min光照后对亚甲基蓝的光催化降解率达到93%,比纯ZnO薄膜的光降解率提高了42%。

The different content of Fe-doped ZnO films were deposited on the glass substrate by sol-gel method, using zinc acetate, ethanol and diethanolamin as raw materials. The structure and morphology of as-deposited film were characterized by XRD, SEM and UV-Vis. The effect of Fe doped content on the degradation rate of methylene blue were studied. The results show that the ZnO： Fe film is dense and uniform. Fe optimal doping amount is 1.5 mol%. The photocatalytic degradation rate on methylene blue irradiated for 150 min reaches 93% when 1.5 mol% Fe-doped ZnO film serves as the photocatalyst, which exceeds 42% when pure ZnO film uses as the catalyst.