CAJ | 학술논문

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30 min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.
장이양화규용효여자제적이양화태용효안조일정적질량비혼합,교반균균후분도도길정적파리표면상,재500℃하열처리30 min득도료투명이양화태도층.채용XRD화AFM분석료이양화태도층적정상결구화표면형모,장도층폭로재태양광혹자자외등하연구타문적광최화여친수성관계.연구결과표명:첨가질량분수위20%～30%적SiO2도TiO2용효중제비적이양화태도층능유효지강저파리표면수적적접촉각,동시,SiO2첨가질량분수위20%～30%시현시우량적광최화성능.유분석결과가지,이양화태도층적광최화성능여친수성정현상관성,타문공동작용산생자청길효과.
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 act together and thus increase the self-cleaning effect.