压电驱动脉动混合可控合成金纳米粒子

Controlled Synthesis of Gold Nanoparticles Using Pulsed Mixing Based on Piezoelectric Actuation

在用柠檬酸钠作还原剂还原氯金酸的基础上,提出了一种压电驱动式脉动微混合可控合成金纳米粒子的制备方法。分析了金纳米粒子的合成机理及脉动微混合的工作原理。针对不同的浓度比(Na_3C_6H_5O_7:HAuCl_4)和脉动混合频率设计并开展了相关金纳米粒子可控合成试验,利用紫外可见分光光度计和透射电子显微镜对所得样品的光学特性、粒子粒径、粒子偏差及单分散性进行了表征,分析了浓度比和频率对试验结果的影响。结果表明:利用压电驱动式脉动微混合法,通过控制两相制剂的浓度比和脉动混合频率,一定程度上可以实现金纳米粒子的可控合成。

On the basis of sodium citrate as a reducing agent to reduce chloroauric acid, a synthesis-controlled method of gold nanoparticles was presented, i.e. the pulsed micromixing technology actuated by PZT actuators. The synthesis mechanism of gold nanoparticles and working principle of pulsed micromixing were analyzed. According to different concentration ratios （Na_3C_6H_5O_7：HAuCl_4） and pulsed mixing frequency, the relevant controlled synthesis tests of gold nanoparticles were designed and carried out. The characteristics of the obtained specimen including optical properties, particle size, particle deviation and monodispersity were characterized using UV-Vis and TEM. The effect of concentration ratio and frequency on the test results was analyzed. The results show that controlled synthesis of gold nanoparticles can be realized using the pulsed micromixing method based on piezoelectric actuation, by controlling the concentration ratio of two preparations and pulsed mixing frequency.