Novel preparation method of nanosilver doped sol gel TiO 2 photocatalysts for dye pollutant degradation

Silija Padikkaparambil, Zahira Yaakob, Binitha N. Narayanan, Resmi Ramakrishnan, Suraja Viswanathan

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

In the present study, a novel method for the silver nanoparticle incorporation into TiO 2 sol is reported which provides efficient dispersion of inserted metal in the calcined gel. Glucose mediated metal nanoparticle synthesis eliminates the additional steps for the introduction of dopant over the support. Ag nanoparticle acts as competent trapping centers preventing the recombination of electron-hole pairs. Thus, in spite of the low UV intensity present in the sunlight, considerable enhancement in the catalytic efficiency was observed for the degradation of dye pollutants over nanosilver loaded TiO 2. Transmission electron microscopic images display the well isolated nanoparticles of silver having uniform dimensions of less than 5 nm over the best system, 2 wt% nanosilver loaded TiO 2, which is accountable for its effectiveness as a photocatalyst. Anatase is found to be the photocatalytic active phase, as evident from the X-ray diffraction studies.

Original languageEnglish
Pages (from-to)108-115
Number of pages8
JournalJournal of Sol-Gel Science and Technology
Volume63
Issue number1
DOIs
Publication statusPublished - Jul 2012

Fingerprint

Photocatalysts
Sol-gels
contaminants
Dyes
dyes
gels
degradation
Nanoparticles
Silver
Degradation
nanoparticles
preparation
Electrons
Metal nanoparticles
silver
Polymethyl Methacrylate
Sols
Titanium dioxide
Glucose
Coloring Agents

Keywords

  • Methylorange
  • Nanosilver
  • Sol gel TiO
  • Sunlight
  • UV irradiation

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Biomaterials
  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

Novel preparation method of nanosilver doped sol gel TiO 2 photocatalysts for dye pollutant degradation. / Padikkaparambil, Silija; Yaakob, Zahira; Narayanan, Binitha N.; Ramakrishnan, Resmi; Viswanathan, Suraja.

In: Journal of Sol-Gel Science and Technology, Vol. 63, No. 1, 07.2012, p. 108-115.

Research output: Contribution to journalArticle

Padikkaparambil, Silija ; Yaakob, Zahira ; Narayanan, Binitha N. ; Ramakrishnan, Resmi ; Viswanathan, Suraja. / Novel preparation method of nanosilver doped sol gel TiO 2 photocatalysts for dye pollutant degradation. In: Journal of Sol-Gel Science and Technology. 2012 ; Vol. 63, No. 1. pp. 108-115.
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