Continuous Synthesis of Surface-modified Zinc Oxide Nanoparticles using Supercritical Methanol
- Continuous Synthesis of Surface-modified Zinc Oxide Nanoparticles using Supercritical Methanol
- Bambang Veriansyah; 김재훈; 김재덕; 이윤우
- Issue Date
- 9th International Symposium on Supercritical Fluids
- Surface-modified zinc oxide (ZnO) with diameters of 400 nm were synthesized rapidly
and continuously in supercritical methanol at temperature 400 oC and at pressure 30 MPa by
using a flow type reactor system and decanoic acid (C9H19COOH) as an organic modifier.
Transmission electron microscopy (TEM) showed that the usage of supercritical methanol and
the addition of decanoic acid changed the shape and size of the nanoparticles. Wide angle Xray
diffraction (WAXD) analysis revealed that the surface-modified nanoparticles had ZnO
crystalline structure. Dispersion test in solvents including water, ethylene glycol and
transformer oil showed that the addition of organic modifier into the reaction system
significantly affected the dispersion stability of nanocrystals. The results of Fourier transform
infrared (FT-IR) demonstrated that reagents comprised of aliphatic groups associated with
decanoic acid and hydroxyl group chemically bounded onto the surface of ZnO nanoparticles.
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