纳米银粒子/磺化聚苯乙烯复合微球的制备及其性能研究

Preparation and properties of nano-silver particles/sulfonated polystyrene composite microspheres

以磺化聚苯乙烯微球(SPS)为载体,通过在其表面负载纳米银粒子的方法,合成了纳米银粒子/磺化聚苯乙烯(Ag/SPS)复合微球,并采用扫描电镜、红外光谱、XRD光谱、热重等方法进行表征,结果表明,在反应温度为70℃、反应时间8 h时,用化学还原法制备了Ag/SPS复合微球,单分散性较好,纳米银粒子包覆均匀。通过催化还原亚甲基蓝的实验发现,在一定范围内,催化反应速率随着复合微球纳米粒子的含量增加而升高;重复利用实验结果证明该复合微球有较高的重复利用性。

In this paper, silver nanoparticles/sulfonated polystyrene(Ag/SPS) composite microspheres were synthesized by using sulfonated polystyrene microspheres(SPS) as carriers and loaded with silver nanoparticles on its surface. The composite microspheres were characterized by scanning electron microscopy, infrared spectroscopy, XRD spectroscopy and thermogravimetry. The results showed that at 70 ℃ and reaction time of 8 h, the monodispersity of Ag/SPS composite microspheres prepared by chemical reduction method was good and the silver nanoparticles were uniformly coated. The results of catalytic reduction of methylene blue showed that in a certain range, the higher the silver content of the composite microspheres, the faster the catalytic rate. The results of reuse experiments showed that the composite microspheres had high reusability.