Supercritical hydrothermal synthesis of copper nanoparticles: Experimental and kinetic study

Copper nanoparticles are widely used in electronics, catalysis, energy storage and other fields. But the traditional preparation technology has the defects of high cost, low yield, and poor product dispersion, which prevent industrialization and application. Supercritical hydrothermal synthesis (SCHS) technology is a green frontier technology for the preparation of nanomaterials, which can overcome the deficiencies of the existing technology and achieve industrialization. In this paper, the material system of SCHS of copper nanoparticles is optimized, and the effects of precursor, reductant, reductant dosage and PVP dosage on the particle size and morphology of the products are investigated, and the influence mechanism is analyzed. In addition, the effect of PVP dosage on the antioxidant capacity of copper nanoparticles was investigated in the context of the oxidation kinetics of copper nanoparticles. The optimal material system for the synthesis of antioxidant copper nanoparticles was finally obtained.