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采用水热法,以载玻片为基片制备了稀土掺杂Ti O2薄膜。以紫外光区吸光度值为指标,确定最佳制备条件为:90℃保温2h,Ti(SO4)2溶液和尿素溶液摩尔比为10∶1,稀土掺杂量为1 mL0.5 mol/L稀土盐溶液,掺杂稀土镧Ti O2薄膜有较好的光吸收性能。利用X-射线粉末衍射法(XRD)、扫描电子显微镜(SEM)及电子能谱法(EDS)对Ti O2薄膜的结构及表面特性进行表征,结果表明制备的稀土掺杂Ti O2薄膜为锐钛矿型。以紫外灯为光源,降解率为指标,罗丹明B溶液降解为模型反应,考察稀土掺杂Ti O2薄膜光催化性能,结果表明,稀土掺杂Ti O2薄膜具有较高光催化活性且明显大于纯Ti O薄膜,该薄膜对罗丹明B的光催化降解率达87%以上。
Hydrothermal method was used to prepare rare earth doped Ti O2 thin films on the glass substrate. The optimum conditions were as follows: the molar ratio of Ti (SO4) 2 solution and urea solution was 10:1, the rare earth doped amount was 1 mL 0.5 mol / L rare earth Salt solution, doped rare earth lanthanum Ti O2 film has better light absorption properties. The structure and surface properties of Ti O2 thin films were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and electron spectroscopy (EDS). The results show that the prepared rare earth doped Ti O2 films are anatase Mine type. The photocatalytic activity of rare earth doped Ti O2 thin films was investigated by UV light as a light source and degradation rate as an indicator. The photocatalytic activity of rare earth doped TiO2 thin films was higher than that of pure Ti O thin film. The photocatalytic degradation rate of rhodamine B was 87%.