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采用TiOSO4为原料制备稳定的锐钛矿型TiO2溶胶,将其与醋丙乳液复合,原位合成含有锐钛矿型TiO2晶粒的复合乳液,并采用浸渍提拉法制备薄膜。分别采用XRD、TEM、SEM等测试手段对TiO2溶胶的物相结构、复合乳液中粒子的大小和形态、薄膜表面形貌等进行表征,并考察TiO2溶胶添加量对薄膜表面形貌、接触角以及光催化性能的影响。结果表明:该复合乳液具有较高的稳定性和良好的成膜特性,TiO2粒子在复合薄膜中分布均匀,随TiO2含量的增大,薄膜表面的TiO2粒子增多,导致薄膜粗糙度增大。经紫外光照后,复合薄膜对水的接触角随TiO2含量的增大而降低,光催化活性逐步提高。
TiOSO4 was used as raw material to prepare stable anatase TiO2 sol, which was compounded with vinegar and acrylic emulsion to synthesize a composite emulsion containing anatase TiO2 particles in situ. The film was prepared by dip-pull method. The phase structure of TiO2 sol, the size and morphology of the particles in the composite emulsion and the surface morphology of the films were characterized by XRD, TEM and SEM. The effects of TiO2 sol on the surface morphology, contact angle, Effect of photocatalytic performance. The results show that the composite emulsion has high stability and good film-forming properties. The TiO2 particles are uniformly distributed in the composite film. With the increase of TiO2 content, the TiO2 particles on the film surface increase, resulting in the increase of the film roughness. After UV irradiation, the contact angle of the composite film with water decreased with the increase of TiO2 content, and the photocatalytic activity increased gradually.