液位沉降法制备 Ti O2薄膜及其性能研究

以钛酸丁酯为前驱液，无水乙醇为溶剂，乙酰丙酮为稳定剂，制备了 TiO2溶胶，采用液位沉降法在清洁的玻璃衬底上镀制TiO2薄膜。研究了添加剂聚乙二醇（1000）、p H、衬底温度对 TiO2溶胶在玻璃基板上附着性的影响；研究了液位沉降速度、容器倾角以及溶胶附着性对TiO2薄膜厚度的影响。考察了TiO2薄膜的表面形貌、晶相、光催化性能。结果表明，采用PEG与 Ti4＋的质量比为1，不调节pH的TiO2溶胶，在沉降速度为7 cm/min ，容器倾角为30°所制得的TiO2薄膜的光催化性能最好，光照3 h时其光催化降解率高达52.1％。

The Preparation of TiO2 Thin Films with Level Sedimentation and Its Properties

TiO2 sol was prepared with butyl titanate as precursor solution ,anhydrous ethanol as solvent ,acetylacetone as the stabilizer .TiO2 thin film was coated on a clean glass substrate by level sedimentation method .The effect of Polyethylene glycol （1 000） as the additives ,pH and the substrate temperature on the adhesion between TiO 2 sol and the glass substrate was studied . The influence of level sedimentation velocity ,container angle and the adhesion on TiO2 thin film thickness was also studied .The surface morphology ,crystal phase ,and the photocatalytic per-formance of TiO2 thin films were researched too .The results showed that when the PEG with Ti4＋ mass ratio was 1 ,the pH value was not adjusted ,the settling velocity was 7 cm/min ,the container angle was 30° ,the photocatalytic properties of TiO2 thin film was the best ,which was as high as 52.1% after being lighted for 3 hours .