| Summary: | 碩士 === 國立臺灣大學 === 化學工程學研究所 === 93 === In this study, supercritical water reduction (SCWR) method was applied to prepare metal oxide and metal nanoparticles. Different from the supercritical water hydrothermal crystallization, reduction methods was used to obtain the nanoparticles. Four kinds of metal precursors, ferric sulfate, copper sulfate, and silver sulfate, were employed in this study to prepare Fe3O4, Cu, Ag, and Pt nanoparticles. The effect of reducing agent concentration was examined. TEM micrographs showed that average particle size of copper, silver, platinum are about 18nm, 28nm and 10nm, respectively. The reaction mechanism for supercritical water reduction was also proposed in this study.
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