聚电解质复合膜中原位合成纳米结构氧化铁中空微球并用于释氧光阳极
In Situ Synthesis of Nanoparticles within Polyelectrolytes Multilayer Films to Fabricate Nanostructured Hematite Hollow Microspheres Used for Oxygen-Evolving Photoanode
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摘要: 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。Abstract: Alternating layers of PSS-Fe complexes and poly（diallyldimethylammonium chloride）（PDDA） were assembled on the melamine formaldehyde（MF） microspheres by layer-by-layer technique.Hematite nanoparticles were in situ synthesized within polyelectrolyte multilayer films（PEMFs）,and nanostructured hollow hematite microspheres were formed after the removal of MF template through further heating treatment.TEM showed that hollow microspheres were monodisperse;XRD showed that those nano-particles consisted by α-Fe2O3 with 7nm medium pores.Excitated by ultraviolet radiation,the nanostructured hematite hollow microspheres used for oxygen-evolving photoanode can generate photoelectrons to induce photocurrent,which indicate its photoelectriochemical oxidation activity.
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