玻璃表面二氧化钛涂层的光催化与亲水性关系(英文)  

Relationship between Photo-Catalysis and Hydrophilicity of Titania Coating on Glass

作　　者：李海洋[1] 张尼尼[2] 罗仲宽[1] 蔡弘华[1] 杜湘琴[1] 陈耀存 王明良[1] 

机构地区：[1]深圳大学化学与化工学院,广东深圳518060 [2]东华大学材料科学与工程学院,上海201620 [3]深圳龙华自来水有限公司,广东深圳518000

出　　处：《稀有金属材料与工程》2008年第A02期55-58,共4页Rare Metal Materials and Engineering

摘　　要：将二氧化硅溶胶与自制的二氧化钛溶胶按照一定的质量比混合，搅拌均匀后喷涂到洁净的玻璃表面上，在500℃下热处理30min得到了透明二氧化钛涂层。采用XRD和AFM分析了二氧化钛涂层的晶相结构和表面形貌，将涂层暴露在太阳光或者紫外灯下研究它们的光催化与亲水性关系。研究结果表明：添加质量分数为20％～30％的SiO2到TiO2溶胶中制备的二氧化钛涂层能有效地降低玻璃表面水滴的接触角，同时，SiO2添加质量分数为20％-30％时显示优良的光催化性能。由分析结果可知，二氧化钛涂层的光催化性能与亲水性呈现相关性，它们共同作用产生自清洁效果。Titania （TiO2） sol was prepared using TiOSO4. Silica sol was added to TiO2 sol with a certain ratio. TiO2 transparent coatings on glass were obtained by spray-coating technique and heat-treated at 500 ℃ for 30 min. The crystal structure and surface morphology of the coating were investigated by XRD and AFM. Their hydrophilic and photo-catalytic behavior ender exposure to sunlight or ultraviolet illumination were then studied. It is found that the addition of 20-30 wt% SiO2 to TiO2 is effective for reducing the contact angle of water. The optimum photo-catalytic character can be acquired by adding 10-30 wt% SiO2 to the TiO2 coating. According to the results, photo-catalytic activity is closely related to hydrophilicity, the two factors

关 键 词：二氧化钛涂层 光催化 亲水性 自清洁 

分 类 号：TQ171[化学工程—玻璃工业]