Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
ACS Appl Mater Interfaces. 2011 Dec;3(12):4561-5. doi: 10.1021/am201265r. Epub 2011 Dec 7.
Single-site Ti-containing macroporous silica thin films with mesoporous frameworks were successfully prepared on quartz substrate with high transparency by using poly(methyl methacrylate) (PMMA) microspheres and organic surfactant as template of porous structures. The presence of mesoporous structure and the differences of macroporous structure of film surface were investigated by XRD and FE-SEM measurements. The local structure of Ti moieties embedded within silica matrixes were also confirmed by UV-vis investigations. It was found that the macroporous structure and the embedded single-site Ti moieties within mesoporous frameworks were quite effective for improvement of surface hydrophilicity, i.e., the water droplet was entirely spread on the film surface even before and after irradiation of UV light.
采用聚甲基丙烯酸甲酯（PMMA）微球和有机表面活性剂作为多孔结构的模板，在高透明度的石英衬底上成功制备了具有介孔结构的单原子 Ti 负载的大孔硅薄膜。通过 XRD 和 FE-SEM 测量研究了薄膜表面的介孔结构和大孔结构的差异。紫外可见光谱研究还证实了 Ti 原子嵌入在二氧化硅基质中的局域结构。结果表明，介孔结构中的大孔结构和嵌入的单原子 Ti 基团对于提高表面亲水性非常有效，即即使在未辐照和辐照紫外光后，水滴也能完全在薄膜表面展开。
