摘  要:本论文采用光化学还原法制备金纳米粒子,着重研究了光敏剂丙酮、保护剂PVA、光照条件下对金纳米粒子的影响，通过实验确定了最佳试验参数。当保护剂PVA为8ml，光敏剂丙酮为4ml，光照强度在一天中的十二点至一点,光照时间为50分钟，是制备金纳米粒子最佳参数。提出了用丙酮作光敏剂，PVA做保护剂光化学合成纳米 Au 粒子的方法，并改变传统方法存在的缺陷。波长在525nm时整个体系吸光度最大，Au晶核颗粒极其均匀，径粒相对较大。

关键词：光化学还原法  光敏剂丙酮  保护剂PVA  性能  金纳米粒子

ABSTRACT:This paper adopts photochemical reduction for the gold nanoparticles, and emphatically studied photosensitizer acetone, PVA, lighting conditions of the gold nanoparticles, through the experiment the best test parameters. When protectants for PVA 8ml, 4ml acetone photosensitizer, light intensity during the day, 12 - 1for an50minutes, the time of light gold nanoparticles preparation is optimal parameters. Put forward by acetone as photosensitizer, PVA do protectants photochemical synthesis methods of nanometer particle Au, and change the traditional method defects. When the system is in 525nm wavelength, the biggest absorbency Au, nucleation particles diameter is relatively large grain. 

Keywords: photochemical reduction method    photosensitizer   acetone PVA    Gold nanoparticles