胶溶法制备具有自清洁与抗菌性能的TiO_2薄膜  

Preparation of TiO_2 Thin Films with Self-cleaning and Antibacterial Properties by Colloidal Chemical Method

作　　者：樊新民[1] 洪洋[1] 汪洋[1] 

机构地区：[1]南京理工大学材料科学与工程学院,南京210094

出　　处：《人工晶体学报》2013年第2期310-315,共6页Journal of Synthetic Crystals

摘　　要：采用胶溶法合成了纳米晶锐钛矿溶胶,在玻璃基底上用提拉法制备出TiO2纳米薄膜。使用XRD、TEM、SEM和AFM和接触角等方法对TiO2溶胶和薄膜的结构进行了表征。结果表明,胶溶法合成的TiO2溶胶为锐钛矿型且结晶度较高,TiO2晶粒为针状,平均粒径约为8 nm;TiO2薄膜表面光滑,颗粒平均粒径约为86 nm。3层薄膜的厚度约为150 nm,涂膜层数对膜表面结构形貌影响有限。常温制备出的薄膜经紫外光照80 min,对亚甲基蓝的降解率达到93.6%,其活性随着热处理温度升高而提高。薄膜具备超亲水性,自清洁和抗菌性能。The anatase sol was synthesized by colloidal chemical method and the nanocrystalline TiO2 films were then prepared on glass substrates by the dip-coating method from the anatase sol. XRD,TEM, SEM,AFM and water contact angle were used to characterize the microstrueture of Ti02 sol and films. The results showed that the TiO2 sol was anatase with high crystallinity. The TiO2 crystals were needle like and average crystallite size was about 8 nm. The surface of TiO2 films were smooth and diameter of particles was 86 nm in average. The thickness of three-layer film is approximately 150 nm. Moreover, coating layers had little influence on morphology. The degradation of methylene blue reached 93.6% when the films prepared at ambient temperature were irradiated by UV light for 80 rain, and the photocatalytic activity increased as heat treatment temperature raised. The TiO2 films possessed self- cleaning and antibacterial properties, as well as super hydrophilicity.

关 键 词：TIO2薄膜 胶溶法 亲水性 自清洁 抗菌 

分 类 号：O482.3[理学—固体物理]