Synthesis of nano sized particles using supercritical fluids
- Synthesis of nano sized particles using supercritical fluids
- 윤용석; 이영호; 안기호; Bambang Veriansyah; 김재훈; 김재덕; 이윤우
- Issue Date
- 9th International Symposium on Supercritical Fluids
- In summary, supercritical methanol acts not only as the reaction medium but also the
reducing agent, in synthesis of pure metal particles. Thus, Ni particles were synthesized
without addition of reducing agent. In addition, phase-controlled synthesis of Ni particles was
achieved by changing starting materials.
For metal oxides such as CeO2 and ZnO, morphology and size of particles were controlled
by surface modifiers such as decanoic acid, oleic acid and CTAB. Barium titanate, one of
important ferroelectric nanoparticles was synthesized in supercritical water, and it was
observed that reaction time and molar ratio of barium hydroxide to anatase affect conversion
of anatase. Adding KOH achieved the BaTiO3 nanoparticles with the high purity.
Hydrothermal/solvothermal method using supercritical fluid provides effective process to
synthesize metal/metal oxide nanoparticles. As mentioned previously, process using
supercritical fluid need short reaction time and can eco-friendly process.
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