Design of macroporous TiO2 thin film photocatalysts with enhanced photofunctional properties
Design of macroporous TiO2 thin film photocatalysts with enhanced photofunctional properties
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DOI：
10.1039/c0ee00389a
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发表时间：
2011-04-01
影响因子：
32.5
通讯作者：
Yamashita, Hiromi
中科院分区：
文献类型：
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作者：
Kamegawa, Takashi;Suzuki, Norihiko;Yamashita, Hiromi
以聚甲基丙烯酸甲酯（PMMA）微球为模板，采用提拉法在石英衬底上成功制备了具有均匀大孔结构的TiO2薄膜。SEM观察显示，大孔的直径与PMMA微球的尺寸显示出良好的对应关系。这些薄膜具有微晶结构并保持相对高的透明度。大孔的构建显著增强了有机污染物如异丙醇和乙醛在紫外光下的降解。结果还发现，具有大孔的TiO2薄膜具有良好的光致亲水性后，短时间的紫外光照射，和缓慢恢复的水接触角在黑暗中相比，那些非多孔的TiO2薄膜。
TiO2 thin films with uniform macropores were successfully prepared on quartz substrates by a dip-coating method using poly(methyl methacrylate) (PMMA) microspheres as a template. SEM observations revealed that the diameter of the macropores showed a good correspondence with the size of the PMMA microspheres. These thin films had anatase crystalline structures and maintained relatively high transparency. The degradation of organic pollutants such as 2-propanol and acetaldehyde under UV light was significantly enhanced by the construction of the macropores. It was also found that TiO2 thin films with macropores exhibited good photoinduced hydrophilicity after a short period of UV light irradiation, and a slow recovery of water contact angles in the dark as compared to those of non-porous TiO2 thin films.