Method for controllable synthesis of silver nanoparticles in microcavity continuous flow and its product and application

Abstract

The application provides a method for controllably synthesizing silver nanoparticles in a microcavity continuous flow, and a product and application thereof, and belongs to the technical field of silver particle preparation. The method comprises the following steps: mixing a silver precursor, a modifier and a reducing agent to obtain a precursor solution; connecting a sample inlet channel of a microfluidic liquid-phase reactor to the precursor solution, performing sampling and reaction, and then mixing the reaction solution with an anti-solvent to perform sedimentation, so as to obtain ligand-modified silver nanoparticles. The application utilizes the extremely high mass transfer and heat transfer rates and the laminar flow diffusion constraint under microscale, and successfully breaks the size limitation of a single chip through fine coupling regulation of a flow rate ratio, a reaction temperature and the strength of a reducing agent / ligand. The average particle diameter of the final product can be intelligently and accurately linearly customized in a wide range of 20nm to 150nm, and the product can maintain an ultra-narrow particle diameter distribution and excellent monodispersity in each particle diameter section.