Facile Synthesis of Quasi Spherical ZnO Nanoparticles with Excellent Photocatalytic Activity

Manoj Pudukudy, Zahira Yaakob

Research output: Contribution to journalArticle

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Abstract

In this article, we report on the synthesis, characterization and photocatalytic activity of quasi spherical ZnO nanoparticles obtained by an egg white assisted facile sol–gel type wet method. The material was characterized for its structural, textural and optical properties. The hexagonal wurtzite crystalline structure of ZnO with high phase purity was confirmed by the X-ray diffraction analysis. The mesoporous texture generated from the inter-agglomeration of ZnO nanoparticles was clearly shown in the transmission electron microscopy (TEM) images. The N<inf>2</inf> sorption analysis indicated a specific surface area of 18 m<sup>2</sup>/g, with monomodal mesoporosity. The optical studies had shown the decreased optical band gap (3.28 eV) of the sample with the existence of a number of crystal defects, especially oxygen vacancies in the sample. The aquatic dye pollutants were effectively degraded under UV irradiation over the ZnO nano photocatalysts. They were also found to be reusable up to five consecutive runs without loss in catalytic activity, indicating their high photostability against photocorrosion.

LanguageEnglish
Pages1187-1201
Number of pages15
JournalJournal of Cluster Science
Volume26
Issue number4
DOIs
Publication statusPublished - 19 Oct 2014

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Nanoparticles
Egg White
nanoparticles
Crystal defects
eggs
Optical band gaps
Polymethyl Methacrylate
Oxygen vacancies
synthesis
Photocatalysts
agglomeration
Transmission Electron Microscopy
X-Ray Diffraction
Specific surface area
crystal defects
wurtzite
sorption
X ray diffraction analysis
Sol-gels
contaminants

Keywords

  • Mesoporosity
  • Optical properties
  • Photodegradation
  • Reusability
  • ZnO nanoparticles

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Biochemistry

Cite this

Facile Synthesis of Quasi Spherical ZnO Nanoparticles with Excellent Photocatalytic Activity. / Pudukudy, Manoj; Yaakob, Zahira.

In: Journal of Cluster Science, Vol. 26, No. 4, 19.10.2014, p. 1187-1201.

Research output: Contribution to journalArticle

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