柱状晶形貌TiO2膜厚对FTO/TiO2镀膜玻璃光催化活性影响

采用溶胶凝胶法,在FTO(SnO2:F)低辐射镀膜玻璃衬底上制备了柱状晶体结构的TiO2薄膜,获得双层结构FTO/TiO2镀膜玻璃样品.研究了TiO2薄膜厚度对FTO/TiO2镀膜玻璃样品的光催化活性、低辐射性能以及透光性能的影响.结果表明,FTO/TiO2镀膜玻璃样品光催化活性随着TiO2薄膜厚度的增加先升高后下降,在TiO2薄膜厚度为300 nm时光催化活性最佳;低辐射性能随着TiO2薄膜厚度的增加而下降,但TiO2薄膜厚度为300 nm时仍然具备一定的低辐射性能;透光性能与TiO2薄膜膜厚的关系不大,可见光透射比保持在72%左右;表面平均粗糙度约为1 nm,表面光滑,不易沾染油污灰尘.该镀膜玻璃在保证低辐射建筑节能和透光的前提下,兼具光催化自清洁功能,具有很好的应用前景.

Impact of Thickness of Columnar Crystal TiO2 Film on Photocatalytic Activity of FTO/TiO2 Coated Glass

Columnar crystal structured TiO2 thin films were prepared on the FTO(SnO2: F) low-emissivity coated glass substrates,obtaining double-layer structure FTO/TiO2 coated glass samples.The effect of TiO2 film thickness on the photocatalytic activity,the low-emissivity performance and light transmission properties of the FTO/TiO2 coated glass samples was investigated.The results showed that the photocatalytic activity of the samples increased firstly and then decrease with the increase of the film thickness.The best catalytic activity was observed for the sample coated with 300 nm TiO2 film.The low-emissivity properties of the samples declined as the TiO2film thickness increased.The sample still have some low-emissivity performance when the TiO2film thickness is 300 nm,while the light transmittance of the samples have little relations with the TiO2films thickness.The visible light transmittances of the samples remain at about 72% with a smooth surface.The average surface roughness of the sample is about 1 nm.The FTO/TiO2coated glass has photocatalytic self-cleaning properties with excellent low emissive performance and light transmittance property,thus guaranteeing good application prospects.