磺化聚苯乙烯/聚苯胺/纳米银复合微球的制备及其催化性能研究

Preparation and catalytic properties of sulfonated polystyrene/polyaniline/silver composite microspheres

选用磺化聚苯乙烯/聚苯胺(SPS/PANI)复合微球作为基材和聚乙烯吡咯烷酮(PVP)作为还原剂和稳定剂,制备新型的磺化聚苯乙烯/聚苯胺/银(SPS/PANI/Ag)复合微球.通过傅立叶红外光谱(FT-IR)、场发射扫描电镜(FESEM)、能谱(EDS)、X线衍射(XRD)和紫外可见光谱(UV)对复合微球的结构、形貌、物相以及催化性能进行表征.结果表明,PS微球、SPS微球、SPS/PANI复合微球和SPS/PANI/Ag复合微球已经成功制备.制备的SPS/PANI/Ag复合微球粒径大约为1.2 1.3μm,Ag纳米粒子和PANI较为均匀的分布于SPS微球表面.并且SPS/PANI/Ag复合微球在硼氢化钠(Na BH4)还原亚甲基蓝(MB)的模型中表现出较高的催化活性和较高的重复利用率.

In this work, new sulfonated polystryrene/polyaniline/silver（ SPS/PANI/Ag） composite microspheres were prepared by using multifunctional sulfonated polystryrene/polyaniline（ SPS/PANI）composite microspheres as substrates and utilizing polyvinylpyrrolidone（ PVP） as reducing agent and stabilizing agent. The morphology,compenent,structure and catalytic properties of the composite microspheres were characterized and investigated by Fourier transform infrared spectrum（ FT IR）,field emission scanning electron microscopy（ FESEM）,energy disperse spectroscopy（ EDX）,Powder X-ray diffraction（ XRD） and UV-visible spectroscopic techniques（ UV）. The results confirmed the formation of PS microspheres,SPS microspheres, SPS/PANI composite microspheres, and SPS/PANI/Ag composite microspheres. Ag nanoparticles and PANI was uniformly distributed on the surface of SPS microspheres with its size ranging from1. 2 to 1. 3 μm. And the SPS/PANI/Ag composite microspheres shown high catalytic activity and high recycling rate in the model with methylene blue（ MB） dye was reduced by sodium hydride（ Na BH4）.