钠钙玻璃负载TiO_2薄膜光催化性能影响因素研究

Catalyst activity supported on soda-lime glass

以普通钠钙玻璃片为载体,采用溶胶—凝胶法,经胶液配制、膜的涂覆与焙烧等工序,制备TiO2催化膜。通过正交实验,考察胶液配比、涂覆次数、升温程序等因素对TiO2薄膜光催化降解苯酚性能的影响,在选定个因素各水平下,在普通钠钙玻璃片上负载TiO2催化膜的影响因素主次顺序为:硝酸体积>涂覆次数>焙烧温度>V乙醇∶V酞酸丁酯,最优条件为:涂覆次数=4次;焙烧温度=450℃;V乙醇∶V酞酸丁酯∶V硝酸(1∶4)∶V水=400∶40∶1∶4。通过扫描电子显微镜(SEM)可以观察到玻璃片表面明显负载着厚实的薄膜,最优条件下制备的TiO2颗粒粒径在100nm左右。

TiO2 film supported on ground glass is prepared by sol-gel method and sol solution preparation,film coating and calcination processes.Through the orthogonal experiment,the effects are investigated of preparing conditions on the photocatalytic degradation of phenol solution such as composition ratio of the sol solution,coating times and calcination temperature.The factor order according to the extent of influence on common soda-lime glass is the dose of HNO3,coating time,calcination temperature,the dose ratio of C2H6O and Ti（C4H9O）4.The optimal preparation conditions based on these experiments are： coating times=4,calcination temperature=450℃,C2H6O∶Ti（C4H9O）4∶ HNO3（1∶4）∶ H2O=400∶40∶1∶4（v/v）.Through SEM,white TiO2 film under the optimal preparation conditions can be observed and the crystallite size is about 100 nanometers.