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采用静电纺丝技术和化学镀方法相结合的方法,用聚丙烯腈(PAN)纳米纤维作为载体,以绿色环保的胺化改性替代化学镀传统的敏化、活化前处理,再化学镀银制备胺化聚丙烯腈纳米纤维载银复合膜(Ag/APAN).SEM、XPS、XRD、FTIR等结果表明,银离子能够吸附在经胺化处理后的PAN纳米纤维表面,且能够在纤维表面生成少量单质银;单质银作为催化活性中心,有效地促进化学镀银的进行,在PAN纳米纤维表面生成均匀致密的银纳米粒子层,制备出了以PAN纳米纤维为核,银层为壳的核壳结构复合膜.银纳米粒子附着在纳米纤维表面,可以使银纳米粒子的催化性能得到充分发挥.通过对催化邻-硝基苯胺与硼氢化钠之间氧化还原反应的研究表明,所制备的Ag/APAN纳米纤维复合膜具有很好的催化效果,且不会造成反应体系的二次污染.
Electrospinning technology and electroless plating method are combined with polyacrylonitrile (PAN) nanofibers as a carrier to replace the traditional sensitization and activation pretreatment with green amination modification, The results of SEM, XPS, XRD and FTIR indicate that silver ions can be adsorbed on the surface of the PAN nanofibers after amination and can be applied on the surface of the fiber A small amount of elemental silver was formed. As the catalytic active center, elemental silver was effectively promoted to promote the electroless silver plating, and a uniform and dense silver nanoparticle layer was formed on the surface of PAN nanofibers. PAN with nanofibers as core and silver layer as shell Core-shell composite membrane.Ag nanoparticles attached to the surface of nanofibers can make the catalytic performance of silver nanoparticles give full play.Through the study of the reaction between o-nitroaniline and sodium borohydride redox reaction showed that the prepared Ag / APAN nanofiber composite membrane has a good catalytic effect, and will not cause secondary pollution of the reaction system.