Hydrothermal synthesis and humidity sensing property of ZnO nanostructures and ZnOIn(OH) 3 nanocomposites

Edit Pál, V. Hornok, Robert Kun, A. Oszkó, Torben Seemann, I. Dékány, Matthias Busse

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Prism- and raspberry-like ZnO nanoparticles and ZnOIn(OH) 3 nanocomposites were prepared by template free hydrothermal method. XRD investigations and microscopic studies showed that pill-like In(OH) 3 particles with body-centered cubic crystal structure formed on the surface of ZnO nanoparticles resulting in increased specific surface area. TEM-EDX mapping images demonstrated that not only nanocomposite formation took place in the course of the synthesis, but zinc ions were also built into the crystal lattice of the In(OH) 3. However, only undoped In(OH) 3 was found on the surface of the pill-like particle aggregates by XPS analyses. The raspberry- and prism-like ZnO particles exhibit strong visible emission with a maximum at 585 and 595nm, respectively, whose intensity significantly increase due to nanocomposite formation. Photoelectric investigations revealed that photocurrent intensity decreased with increasing indium ion concentration during UV light excitation, which was explained by increase in visible fluorescence emission. QCM measurements showed that morphology of ZnO and concentration of In(OH) 3 had an influence on the water vapor sensing properties.

Original languageEnglish
Pages (from-to)100-109
Number of pages10
JournalJournal of Colloid and Interface Science
Volume378
Issue number1
DOIs
Publication statusPublished - Jul 15 2012

Fingerprint

Hydrothermal synthesis
Nanostructures
Atmospheric humidity
Nanocomposites
Prisms
Nanoparticles
Ions
Photocurrents
Crystal lattices
Specific surface area
Ultraviolet radiation
Indium
Water vapor
Energy dispersive spectroscopy
Steam
Zinc
X ray photoelectron spectroscopy
Crystal structure
Fluorescence
Transmission electron microscopy

Keywords

  • Hydrothermal method
  • Indium hydroxide
  • Nanocomposites
  • Photoluminescence
  • Water vapor sensor
  • ZnO nanoparticles

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Colloid and Surface Chemistry

Cite this

Hydrothermal synthesis and humidity sensing property of ZnO nanostructures and ZnOIn(OH) 3 nanocomposites. / Pál, Edit; Hornok, V.; Kun, Robert; Oszkó, A.; Seemann, Torben; Dékány, I.; Busse, Matthias.

In: Journal of Colloid and Interface Science, Vol. 378, No. 1, 15.07.2012, p. 100-109.

Research output: Contribution to journalArticle

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