摘要： 为了制备具有良好的光致超亲水性的 SiO₂-TiO₂薄膜，实验用溶胶凝胶法结合超声技术以正硅酸乙酯（TEOS）和钛酸丁酯（TBOT）为前驱体制备 SiO₂-TiO₂溶胶；采用浸渍提拉法在普通载玻片上涂膜；然后分别运用微波炉和马弗炉 ２种不同的烧结方式进行热处理制得产品。将所得产品分别进行接触角、紫外 －可见分光光度计、FT-IR、AFM测试。结果表明：马弗炉烧结得到的 SiO₂-TiO₂薄膜亲水性要好于微波炉烧结，并且在 V（TEOS）∶V（TBOT）＝0.75:1时，接触角最小，可达到4.3°，满足防污自清洁的要求；红外谱图说明有Ti—O—Si键的生成，证明 SiO₂和TiO₂之间生成了复合氧化物。

关键词: 溶胶凝胶法, SiO₂-TiO₂, 亲水, 薄膜, 烧结

Abstract: In order to prepare the SiO₂-TiO₂ film with excellent photoinduced superhydrophilicity, SiO₂-TiO₂ sol based on butyl titanate( TBOT) and tetraethyl orthosilicate(TEOS) as precursor was prepared by sol-gel process under ultrasonography condition. SiO₂-TiO₂ films were prepared on common glass substrates with dip-coating technique, which were then heat-treated in microwave oven and muffle fumace to obtain the end products. These films were tested by contact angle tester, ultraviolet-visible spectrophotometer, IR and AFM. The results showed that the hydrophilicity of SiO₂-TiO₂ films heated in muffle furnace was better than that in microwave oven. When the volume ratio of TEOS and TBOT is 0.75, the contact angle was the lowest, 4. 3°, which is sufficient to satisfy the requirement of anti-pollution and self-cleaning.The peaks of Ti-O-Si bond in FT-IR spectrogram suggested that a new composite oxide is formed between SiO₂ and TiO₂.

Key words: sol-gel process, SiO₂-TiO₂, hydrophilicity, film, heat treatment