银纳米粒子的光催化合成

Photocatalytic synthesis of Ag nanoparticles

在聚丙烯酸钠溶液中,利用紫外光还原制备银纳米粒子.通过调控光照波长、时间、聚丙烯酸钠质量分数和硝酸银的浓度,获得不同粒径和形貌的银纳米粒子.透射电子显微镜分析表明,合成粒径在50~90nm球形银纳米粒子的最佳实验条件为聚丙烯酸钠质量分数为25%,硝酸银浓度为0.025moL·L-1,365nm紫外光源照射,照射时间4h.

Ag Nanoparticles can be synthesized in sodium polyacrylate solution by UV irradiation reduction.Ag nanoparticles of different size and morphology were obtained through control of light wavelength,time,and the concentration of sodium polyacrylate and silver nitrate.Transmission electronic microscope analysis showed that the best experimental conditions for the synthesis of spherical silver nanoparticles with diameter of 50~90 nm are 25% sodium polyacrylate,0.025 moL·L-1 silver nitrate,for 4 hours under 365 nm UV irradiation.