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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。
Based on the reduction of chloroauric acid with sodium citrate as reductant, a piezoelectric-driven pulsatile micro-mixing controlled synthesis of gold nanoparticles was proposed. The synthesis mechanism of gold nanoparticle and the working principle of pulsating micromixing were analyzed. The controllable synthesis of gold nanoparticles was designed and developed for different concentration ratios (Na_3C_6H_5O_7: HAuCl_4) and pulsed mixing frequency. The optical properties, particle size and particle deviation of the obtained samples were measured by UV-visible spectrophotometer and transmission electron microscope And monodispersity were characterized, the effect of concentration ratio and frequency on the test results were analyzed. The results show that the controlled synthesis of gold nanoparticles can be achieved to a certain extent by controlling the concentration ratio and pulsating mixing frequency of the two-phase formulation by the piezoelectric-driven pulsatile micro-mixing method.