Abstract

Precious metal nanomaterials have broad application prospects in many fields. However, most of the existing synthesis processes of precious metal nanomaterials are carried out in a batch reactor. Recently, the technology of batch preparation of noble metal nanoparticles by chemical method has become mature, but with the increase of reactor volume, the problems of heat and mass transfer of the system are prominent. In this paper, the technology of reducing plant biomass with green characteristics to prepare precious metal nanoparticles was introduced into the continuous operation of micro channel reactor and reactor to investigate the influence of reactor structure parameters and reaction conditions on the formation and particle size distribution of precious metal nanoparticles, and combined with computational fluid dynamics (CFD) simulation technology to explore its influence mechanism. In this paper, it is found that the AgNPs (4.7 ± 1.9 nm) prepared by ETFE tube has a larger average particle size and a wider particle size distribution than the AgNPs (4.24 ± 0.9 nm) prepared by PTFE tube.

摘要

贵金属纳米材料在许多领域具有广阔的应用前景。然而，现有的贵金属纳米材料合成工艺大多是在间歇式反应器中进行的。近年来，化学法批量制备贵金属纳米粒子的技术已经成熟，但随着反应器体积的增大，体系传热传质问题较为突出。本文将具有绿色特性的植物生物量还原制备贵金属纳米粒子的技术引入微通道反应器和反应器的连续运行中，研究反应器结构参数和反应条件对贵金属纳米粒子的形成和粒度分布的影响。金属纳米粒子，并结合计算流体动力学（CFD）模拟技术探索其影响机制。在本文中，发现由 ETFE 管制备的 AgNPs (4.7 ± 1.9 nm) 比由 PTFE 管制备的 AgNPs (4.24 ± 0.9 nm) 具有更大的平均粒径和更宽的粒径分布。