Chemical purification of ZnO nanoparticles by dialyzing treatments and their use in fabricating luminescent antireflective nanocomposite thin films

Natsumi Watanabe, Shinobu Fujihara

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

ZnO nanoparticles were prepared by a chemical solution method using the reaction between Zn(CH3COO)2·2H2O and LiOH·H2O in an ethanol solvent. A dialyzing treatment of the resultant chemically impure nanoparticles was introduced in the present work, aiming at increasing their chemical purity in terms of adsorbed species. The progress of dialysis was monitored with electrical conductivity of dialysate. X-ray diffraction analysis and Fourier transform infrared spectroscopy were employed to check the chemical purity of the ZnO nanoparticles after the dialyzing treatment. Furthermore, the dialyzed ZnO nanoparticles were utilized to fabricate ZnO/SiO2 nanocomposite thin films by a sol-gel method with a dip-coating technique. Stable coating solutions were obtained only with the dialyzed ZnO nanoparticles, which also indicated their chemical purity. The nanocomposite thin films exhibited a unique optical property with antireflection against visible light and photoluminescence under irradiation with ultraviolet light.

Original languageEnglish
Pages (from-to)5611-5617
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume50
Issue number9
DOIs
Publication statusPublished - 2011 May 4

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Nanocomposite films
Purification
Nanoparticles
Thin films
Coating techniques
Dialysis
Dialysis Solutions
X ray diffraction analysis
Sol-gel process
Fourier transform infrared spectroscopy
Photoluminescence
Ethanol
Optical properties
Irradiation
Coatings

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

Cite this

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N2 - ZnO nanoparticles were prepared by a chemical solution method using the reaction between Zn(CH3COO)2·2H2O and LiOH·H2O in an ethanol solvent. A dialyzing treatment of the resultant chemically impure nanoparticles was introduced in the present work, aiming at increasing their chemical purity in terms of adsorbed species. The progress of dialysis was monitored with electrical conductivity of dialysate. X-ray diffraction analysis and Fourier transform infrared spectroscopy were employed to check the chemical purity of the ZnO nanoparticles after the dialyzing treatment. Furthermore, the dialyzed ZnO nanoparticles were utilized to fabricate ZnO/SiO2 nanocomposite thin films by a sol-gel method with a dip-coating technique. Stable coating solutions were obtained only with the dialyzed ZnO nanoparticles, which also indicated their chemical purity. The nanocomposite thin films exhibited a unique optical property with antireflection against visible light and photoluminescence under irradiation with ultraviolet light.

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