原料配比对介孔TiO_2薄膜避光超亲水性的影响

采用蒸发诱导自组装法制备介孔TiO2薄膜,通过改变原料配比水解比H、抑制比p、TiO2与模板剂比s值控制合成介孔TiO2薄膜,考察原料配比对介孔TiO2薄膜避光超亲水性的影响。结果表明,随H、s值增大,介孔孔径和平均粒径先增大后减小,TiO2以锐钛矿型出现,TiO2薄膜避光超亲水性先增强后减弱;随p值增大,孔径和平均粒径逐渐减小,金红石含量增大,TiO2薄膜避光超亲水性逐渐降低。当H=15,p=2,s=188时,所制备的TiO2薄膜最大孔径为10.2 nm,避光12 h后接触角仍小于5°。在所制备粒径范围内,介孔孔径对薄膜避光超亲水性的影响大于粒径的影响。

Effect of raw material ratio on super-hydrophilicity of mesoporous TiO2 films in dark

Mesoporous TiO2 thin films were prepared by evaporation-induced self-assembly method. The raw material ratio of mesoporous films was changed （p） and metal to surfactant ratios （s）. Effect of raw by varying the hydrolysis ratios （H）, HCL/Ti ratios material ratio on super-hydrophilicity of mesoporous TiO2 films in dark was investigated. The results show that with increasing H and s values,pore size of mesoporous and average particle diameter increases and then decreases. The films consist with anatase phase. The super-hydrophilicity of mesoporous TiO2 films in dark increases and then decrease. With increasing p value, pore size of mesoporous, average particle diameter decreases and content of rutile of samples increases. The super-hydrophilicity of mesoporous TiO2 films in dark decreases gradually. The maximum pore size of mesoporous was 10.2 nm when the H, p, s value are 15,2,188, respectively. The contact angle is still lower than 5~ when it is kept in dark for 12 h. Effect of pore size of mesoporous on super-hydrophilicity in dark is larger than that of particle size at the range of the prepared particle diameters.