负载型纳米Ag颗粒的制备及其催化性能研究

Study on preparation and catalytic properties of loaded Ag nanoparticles

利用聚4-乙烯基吡啶(P4VP)大分子单体与苯乙烯(St)进行分散聚合一步法制备得到粒径均一的聚4-乙烯基吡啶(P4VP)-g-聚苯乙烯(PS)共聚物微球(P4VP-g-PS)。研究发现通过调控反应介质中混合溶剂的极性、P4VP大分子单体用量可控制微球粒径。将其作为Ag载体,使Ag+原位还原成Ag纳米颗粒,在催化亚甲基蓝(MB)的实验中使MB的降解量达到96. 7%。

The poly( 4-vinylpyridine) grafted polystyrene copolymer microspheres( P4 VP-g-PS) with uniform size were synthesized based on the dispersion copolymerization of P4 VP macromonomers.The results show that the diameter of the microspheres could be controlled by the polarity of the solvent in the reaction medium and the concentration of macromonomers.Then the copolymer microspheres were used as Ag support,Ag+was in-situ reduced to Ag nanoparticles,the loaded Ag nanoparticles which performed catalytic activity in the degradation of methylene blue( MB) were obtained,in the experiment of catalyzing methylene blue( MB),the degradation amount of MB reached 96. 7%.