用户论文(2005)：掺杂锡离子对纳米二氧化钛薄膜光催化性能的影响

【中文摘要】 采用溶胶-凝胶法在玻璃上制备了透明锐钛矿型纳米TiO2薄膜和金属锡离子掺杂的锐钛矿与金红石混晶型纳米TiO2薄膜,并利用X射线衍射(XRD)、原子力显微镜(AFM)、紫外-可见分光光度计对合成的薄膜进行表征.研究了掺杂锡离子对TiO2薄膜吸收光谱及光催化活性的影响,结果表明:掺杂锡离子使得TiO2薄膜对入射光的吸收带边发生红移;适量掺杂锡离子能够显著地提高TiO2薄膜的光催化活性.并探讨了镀膜层数对薄膜光催化活性的影响,发现对于掺杂不同浓度锡离子的TiO2薄膜均有其对应的最佳膜层数. 【英文摘要】 The uniform and transparent nanocrystalline thin film photocatalysts of pure and Sn~(4+) doped titanium dioxide were prepared via sol-gel dip-coating process on the glass substrates.The thin films were characterized by X-ray diffraction(XRD),atomic force microscopy(AFM) and ultraviolet-visible(UV-VIS) spectrophotometer.It was noted that pure titanium dioxide thin film only had anatase structure,but Sn~(4+) doped ones had a coexistence of anatase and rutile.The effects of different amount of Sn~(4+) dopant o...