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利用层层静电自组装技术,将PSS-Fe3+复合物与聚二烯丙基二甲基氯化铵(PDADMAC,Poly(diallyldimethylammonium)Chloride)交替吸附在三聚氰胺甲醛树脂(MF)微球外。以聚电解质复合层作为纳米反应器,原位合成了氧化铁纳米颗粒;高温热处理可将中心的MF微球去除,生成中空纳米结构的铁氧化物微球。TEM说明,中空微球具有单分散性;XRD说明纳米颗粒是α-Fe2O3,壁的孔径约为7 nm。在紫外灯开启和关闭时,由该氧化铁微球修饰的释氧光阳极会引起光电流的即时变化,显示该中空α-Fe2O3微球组成的薄膜具有灵敏的光电催化活性。
The PSS-Fe3 + composite was alternately adsorbed on melamine-formaldehyde resin (MF) microspheres by multilayer electrostatic self-assembly technique with PDADMAC (Polymerization of diallyldimethylammonium chloride). Using polyelectrolyte composite layer as a nano reactor, in situ synthesis of iron oxide nanoparticles; high-temperature heat treatment can remove the center MF microspheres to generate hollow nanostructured iron oxide microspheres. TEM shows that the hollow microspheres have monodispersity; XRD shows that the nanoparticles are α-Fe2O3, and the diameter of the wall is about 7 nm. When the UV lamp is switched on and off, the oxygen-releasing photoanode modified by the iron oxide microspheres can cause the instantaneous change of the photocurrent, indicating that the film composed of the hollow α-Fe2O3 microspheres has a sensitive photoelectrocatalytic activity.