采用溶胶-凝胶法在载玻片表面制备了均匀透明的TiO2/SiO2超亲水性薄膜.利用XRD、红外光谱(IR)和分光光度计,研究了SiO2添加量对薄膜微结构、透光率、亲水性的影响.结果表明: 添加SiO2后,薄膜中TiO2晶粒尺寸变小; 在薄膜中,TiO2和SiO2分别单独形成颗粒,但有部分Ti-O-Si键形成,存在部分复合氧化物; 由于取代反应,复合氧化物中表面形成Lewis酸,薄膜表面吸附的羟基含量增多且稳定,可提高TiO2薄膜的超亲水特性,其超亲水性状态在暗处可保持很长时间; SiO2添加量为40%时的薄膜亲水性最好.
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