SUPERCRITICAL HYDROTHERMAL SYNTHESIS METHOD FOR METAL OR METAL OXIDE NANOPARTICLES

摘要

A supercritical hydrothermal synthesis method for metal or metal oxide nanoparticles comprises the following steps: fully mixing a soluble metal salt solution with an alkaline solution or with a mixture of an alkaline solution, a reducing agent solution and an organic ligand to serve as a reaction precursor of supercritical hydrothermal synthesis; using a high-pressure pump to separately pressurize and pump the reaction precursor and preheated supercritical water into a mixer, heating up by direct mixing, and then performing a supercritical hydrothermal synthesis reaction; and after reaction for a period of time, cooling, centrifuging and drying the obtained product, so as to obtain metal or metal oxide nanoparticles. The metal or metal oxide nanoparticles prepared by using the method have the advantages of small particle size, good dispersibility, and high purity.