Continuous synthesis of metal nanoparticles using supercritical alcohol
- Continuous synthesis of metal nanoparticles using supercritical alcohol
- 최혜민; Bambang Veriansyah; 김재훈; 김재덕; 강정원
- supercritical fluids; metal nanoparticles
- Issue Date
- Metal nanoparticles have attracted a great deal of attention for interesting physical properties and wide varieties of potential applications in various areas. Various methods have been used to synthesis nanoparticles including sonochemical reduction, chemical reduction, polyol process, radiolytic reduction, solvent-extraction reduction, and supercritical hydrothermal synthesis. In this work, we propose a simple continuous synthesis of metal nanoparticles using supercritical methanol without using reducing agents or surfactants. The influence of reaction temperature on the resulting particle metal were investigate and the probably mechanisms of the formation of metal (Ni, Cu, and Ag) were discussed. Nanoparticles of nickel (Ni), copper (Cu), silver (Ag) were synthesized in supercritical MeOH at 30 MPa, 400oC and reaction time of 17 sec. The supercritical methanol acted both as reaction medium and as a reducing agent. The synthesized nanoparticles were characterized using a X-ray diffractions (XRD) and a scanning electron microscopy (SEM).
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