中文摘要：

以钛酸丁酯Ti（OC4H）t、冰醋酸、去离子水和无水乙醇、含水硝酸铁等为原料，采用溶胶一凝胶法，制备得到掺铁纳米二氧化钛材料镀膜玻璃和二氧化钛粉体，研究了掺铁量、掺杂PEG量、镀膜层数、水浴处理等因素对TiO2纳米膜透光率和光催化活性的影响，并对其进行表征测试和探讨。研究发现，掺铁会优化TiOz纳米薄膜的很多性能。掺铁后薄膜的晶粒尺寸逐渐变小，晶格畸变比例变大。掺铁不改变二氧化钛的晶型结构。在透光率试验中，掺杂PEG的样品，水浴处理后测试效果较好，掺杂浓度与实验效果并不成正比。光催化实验中，掺杂浓度为0．075％时的效果最好。最终得出，在掺杂浓度为0．075％时，水浴处理并添加适量的PEG，镀4层膜时的综合效果最好。

英文摘要：

Fe3＋-doped TiO2 nanometer thin films were prepared on the surface of glass and the nanometer TiO2 powder was prepared by sol-gel process, using Ti （OC4H9）4, glacial acetic acid, deionized water, anhydrous alcohol and Fe（NO3）a.gH20 as raw materials. Effects of irondoping, PEG addition levels, the number of layers and water bath processing on transmittance and photocatalytic degradability were then respectively investigated. Meanwhile some mechanisms of the effects were characteristically tested and discussed. It was shown that many performances of the films could be improved by iron-doping, which making grain size smaller, the lattice distortion ratio larger. The crystal structure of TiO2 was not changed by doped iron. In the light transmission test, the effect of the water bath processing was better in the samples doped PEG, doping concentration and the effect of experimental was not proportional. The effect was best in the photocatalytic experiments when doping concentration was 0. 075 %. The best results were obtained with doping concentration of 0.075 %, water bathed, appropriate addition of PEG, and 4 layers of plating.