摘  要:研究了在可溶性聚合物体系中Pd纳米粒子的光化学合成。PdCl2-PEG-600-丙酮溶液在太阳光照射下变为灰黑色，获得了Pd纳米胶体粒子，然后用7200分光光度计测其混合溶液的吸光度，找出PdCl2-PEG-600-丙酮的最佳配比。实验结果表明，在1.0mLPdCl2、2.0mL丙酮和4.0mLPEG-600的配比下反应较明显，同时研究了时间、温度的影响。探讨了体系中Pd（Ⅱ）的快速光化学还原和纳米Pd粒子的稳定性机理。

关键词： Pd纳米粒子;  光化学合成; 太阳光; 稳定性机理

ABSTRACT:The photochemical synthesis of Pd nanoparticles was studied in dissoluble polymer system. in the sunlight illumination, PdCl2 - mpeg - 600 - acetone solution won a gray Pd nanoparticles colloid .then use 7200 spectrophotometer measuring its mix of solution, and find out the absorbency mpeg - 600 - PdCl2 - the best ratio of acetone. Experimental results show that the 4.0mlPEG - 600 1.0mLPdCl22.0mL acetone and the proportion of reaction is more apparent, and the effects of time,The temperature. discusses the effect of (Ⅱ) system of rapid Pd reduction and photochemical stability of nanometer Pd particles mechanism.

Keywords: Pd nanoparticles; Photochemical synthesis; The sun; Stability mechanism