Department of Materials Science and the Advanced Coatings Research Center of China Educational Ministry, Fudan University, Shanghai 200433, PR China.
Langmuir. 2010 Jul 6;26(13):11391-6. doi: 10.1021/la1008413.
Rattle-type TiO(2)@void@SiO(2) particles, with commercial TiO(2) particles encapsulated into hollow SiO(2) shell, were fabricated by successive coating of multilayer polyelectrolytes and SiO(2) shell onto TiO(2) particles and then treatment by UV irradiation to remove the polyelectrolyte layers. TEM observation showed that the composite particles had a unique rattle-type structure in which there existed void space between TiO(2) core and SiO(2) shell. The photocatalytic degradation of Rhodamine B indicated that these composite particles with larger void space tended to have higher photoactivity. The polyurethane films doped with rattle-type TiO(2)@void@SiO(2) composite particles had very good UV-shielding property.
摇铃型 TiO(2)@void@SiO(2) 粒子，即将商用 TiO(2) 粒子封装于中空的 SiO(2) 壳中，通过将多层聚电解质和 SiO(2) 壳连续涂覆到 TiO(2) 粒子上，然后用 UV 照射处理以去除聚电解质层来制备。TEM 观察表明，复合粒子具有独特的摇铃型结构，其中 TiO(2) 核和 SiO(2) 壳之间存在空隙空间。罗丹明 B 的光催化降解表明，这些具有较大空隙空间的复合粒子具有更高的光活性。掺杂有摇铃型 TiO(2)@void@SiO(2) 复合粒子的聚氨酯薄膜具有非常好的紫外线屏蔽性能。
