Continuous synthesis of metal nanoparticles using supercritical alcohol

Title
Continuous synthesis of metal nanoparticles using supercritical alcohol
Authors
최혜민Bambang Veriansyah김재훈김재덕강정원
Keywords
supercritical fluids; metal nanoparticles
Issue Date
2009-10
Publisher
Supergreen2009
Abstract
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).
URI
http://pubs.kist.re.kr/handle/201004/36031
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KIST Publication > Conference Paper
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