二氧化钛薄膜的制备及其对光催化氧化微量丙酮气的影响

The Effect of Preparation of Titania Film on the Photocatalytic Oxidation Performance for Trace Acetone Gas

采用浸渍——提拉法将二氧化钛溶胶附着在玻璃板上制备了纳米二氧化钛薄膜。通过热重分析及TEM测试,确定了二氧化钛薄膜适宜的煅烧温度为550℃。纳米粒子为类圆形,颗粒分布均匀。考察了影响二氧化钛光催化性能的因素,确定出钛酸四丁酯、冰醋酸、水和乙醇的适宜摩尔比为1∶5∶6∶18。XRD分析结果表明,二氧化钛样品中包含有锐钛型和金红石型的晶型结构,该晶型结构有利于提高其光催化性能。

Nanometer titania film attached titania sol to glass plate was prepared by dip-coating method. Based on the results of gravitational thermal analysis and TEM analysis, the suitable calcination temperature for the titania film was determined to be 550 ℃. The morphology of nano-particles was quasi-circular, and the particles were well-distributed. The elements which impacted on titania photocatalytic performance were examined and the appropriate molar ratio was determined to be Ti（OBu）4∶CH3COOH∶H2O∶CH3CH2OH=1∶5∶6∶18. XRD analysis showed that the sample contained titania anatase and rutile crystal structure, which helped improve its photocatalytic properties.