Continuous synthesis of surface-modified zinc oxide nanoparticles in supercritical methanol

Bambang Veriansyah, Jae Duck Kim, Byoung Koun Min, Young Ho Shin, Youn Woo Lee, Jaehoon Kim

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Continuous synthesis of surface-modified zinc oxide (ZnO) nanoparticles was examined using surface modifiers (oleic acid and decanoic acid) in supercritical methanol at 400 °C, 30 MPa and a residence time of ∼40 s. Wide angle X-ray diffraction (WAXD) analysis revealed that the surface-modified nanoparticles retained ZnO crystalline structure. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the surface modifiers changed drastically the size and morphology of the ZnO nanoparticles. When the molar ratio of oleic acid to Zn precursor ratio was 30, 10 nm size particles with low degree of aggregation were produced. The surface-modified ZnO nanoparticles had higher BET surface areas (29-36 m2/g) compared to unmodified ZnO particles synthesized in supercritical water (0.7 m2/g). Fourier transform infrared (FT-IR) and thermogravimetric analysis (TGA) indicated that aliphatic, carboxylate and hydroxyl groups were chemically attached on the surface of ZnO nanoparticles. Long-term (80 days) dispersion test using ultraviolet transmittance showed that the surface-modified ZnO particles had enhanced dispersion stability in ethylene glycol. Crown

Original languageEnglish
Pages (from-to)76-83
Number of pages8
JournalJournal of Supercritical Fluids
Volume52
Issue number1
DOIs
Publication statusPublished - 2010 Feb 1

Fingerprint

Zinc Oxide
Zinc oxide
zinc oxides
Methanol
methyl alcohol
Nanoparticles
nanoparticles
synthesis
oleic acid
Oleic acid
Oleic Acid
Ethylene Glycol
Ethylene glycol
Hydroxyl Radical
X ray diffraction analysis
carboxylates
Thermogravimetric analysis
glycols
transmittance
Fourier transforms

Keywords

  • Nanoparticles
  • Supercritical methanol
  • Surface modification
  • Zinc oxide

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Chemical Engineering(all)
  • Condensed Matter Physics

Cite this

Continuous synthesis of surface-modified zinc oxide nanoparticles in supercritical methanol. / Veriansyah, Bambang; Kim, Jae Duck; Min, Byoung Koun; Shin, Young Ho; Lee, Youn Woo; Kim, Jaehoon.

In: Journal of Supercritical Fluids, Vol. 52, No. 1, 01.02.2010, p. 76-83.

Research output: Contribution to journalArticle

Veriansyah, Bambang ; Kim, Jae Duck ; Min, Byoung Koun ; Shin, Young Ho ; Lee, Youn Woo ; Kim, Jaehoon. / Continuous synthesis of surface-modified zinc oxide nanoparticles in supercritical methanol. In: Journal of Supercritical Fluids. 2010 ; Vol. 52, No. 1. pp. 76-83.
@article{2c6e9c32b3a340deb94ba457994d3413,
title = "Continuous synthesis of surface-modified zinc oxide nanoparticles in supercritical methanol",
abstract = "Continuous synthesis of surface-modified zinc oxide (ZnO) nanoparticles was examined using surface modifiers (oleic acid and decanoic acid) in supercritical methanol at 400 °C, 30 MPa and a residence time of ∼40 s. Wide angle X-ray diffraction (WAXD) analysis revealed that the surface-modified nanoparticles retained ZnO crystalline structure. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the surface modifiers changed drastically the size and morphology of the ZnO nanoparticles. When the molar ratio of oleic acid to Zn precursor ratio was 30, 10 nm size particles with low degree of aggregation were produced. The surface-modified ZnO nanoparticles had higher BET surface areas (29-36 m2/g) compared to unmodified ZnO particles synthesized in supercritical water (0.7 m2/g). Fourier transform infrared (FT-IR) and thermogravimetric analysis (TGA) indicated that aliphatic, carboxylate and hydroxyl groups were chemically attached on the surface of ZnO nanoparticles. Long-term (80 days) dispersion test using ultraviolet transmittance showed that the surface-modified ZnO particles had enhanced dispersion stability in ethylene glycol. Crown",
keywords = "Nanoparticles, Supercritical methanol, Surface modification, Zinc oxide",
author = "Bambang Veriansyah and Kim, {Jae Duck} and Min, {Byoung Koun} and Shin, {Young Ho} and Lee, {Youn Woo} and Jaehoon Kim",
year = "2010",
month = "2",
day = "1",
doi = "10.1016/j.supflu.2009.11.010",
language = "English",
volume = "52",
pages = "76--83",
journal = "Journal of Supercritical Fluids",
issn = "0896-8446",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Continuous synthesis of surface-modified zinc oxide nanoparticles in supercritical methanol

AU - Veriansyah, Bambang

AU - Kim, Jae Duck

AU - Min, Byoung Koun

AU - Shin, Young Ho

AU - Lee, Youn Woo

AU - Kim, Jaehoon

PY - 2010/2/1

Y1 - 2010/2/1

N2 - Continuous synthesis of surface-modified zinc oxide (ZnO) nanoparticles was examined using surface modifiers (oleic acid and decanoic acid) in supercritical methanol at 400 °C, 30 MPa and a residence time of ∼40 s. Wide angle X-ray diffraction (WAXD) analysis revealed that the surface-modified nanoparticles retained ZnO crystalline structure. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the surface modifiers changed drastically the size and morphology of the ZnO nanoparticles. When the molar ratio of oleic acid to Zn precursor ratio was 30, 10 nm size particles with low degree of aggregation were produced. The surface-modified ZnO nanoparticles had higher BET surface areas (29-36 m2/g) compared to unmodified ZnO particles synthesized in supercritical water (0.7 m2/g). Fourier transform infrared (FT-IR) and thermogravimetric analysis (TGA) indicated that aliphatic, carboxylate and hydroxyl groups were chemically attached on the surface of ZnO nanoparticles. Long-term (80 days) dispersion test using ultraviolet transmittance showed that the surface-modified ZnO particles had enhanced dispersion stability in ethylene glycol. Crown

AB - Continuous synthesis of surface-modified zinc oxide (ZnO) nanoparticles was examined using surface modifiers (oleic acid and decanoic acid) in supercritical methanol at 400 °C, 30 MPa and a residence time of ∼40 s. Wide angle X-ray diffraction (WAXD) analysis revealed that the surface-modified nanoparticles retained ZnO crystalline structure. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the surface modifiers changed drastically the size and morphology of the ZnO nanoparticles. When the molar ratio of oleic acid to Zn precursor ratio was 30, 10 nm size particles with low degree of aggregation were produced. The surface-modified ZnO nanoparticles had higher BET surface areas (29-36 m2/g) compared to unmodified ZnO particles synthesized in supercritical water (0.7 m2/g). Fourier transform infrared (FT-IR) and thermogravimetric analysis (TGA) indicated that aliphatic, carboxylate and hydroxyl groups were chemically attached on the surface of ZnO nanoparticles. Long-term (80 days) dispersion test using ultraviolet transmittance showed that the surface-modified ZnO particles had enhanced dispersion stability in ethylene glycol. Crown

KW - Nanoparticles

KW - Supercritical methanol

KW - Surface modification

KW - Zinc oxide

UR - http://www.scopus.com/inward/record.url?scp=74449090213&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=74449090213&partnerID=8YFLogxK

U2 - 10.1016/j.supflu.2009.11.010

DO - 10.1016/j.supflu.2009.11.010

M3 - Article

AN - SCOPUS:74449090213

VL - 52

SP - 76

EP - 83

JO - Journal of Supercritical Fluids

JF - Journal of Supercritical Fluids

SN - 0896-8446

IS - 1

ER -