Photocatalytic activity of AgI sensitized ZnO nanoparticles under visible light irradiation

K. Vignesh, A. Suganthi, M. Rajarajan, S. A. Sara

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Nanoparticles of zinc oxide (ZnO) sensitized with silver iodide (AgI) were synthesized by a chemical precipitation method and were found to be a visible light driven photocatalyst. The characterization of prepared photocatalyst was studied using UV-visible diffuse reflectance spectroscopy (UV-vis-DRS), X-ray powder diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). Average crystallite size determined by XRD was 21.56. nm for ZnO and 23.44. nm for AgI sensitized ZnO (AgI-ZnO). The photocatalytic efficiency of AgI-ZnO was evaluated by the decolorization of rosaniline hydrochloride dye (RA) under visible light irradiation. The influence of various operational parameters such as the effect of pH, catalyst dosage and initial dye concentration on the photodecolorization was investigated in detail. The removal percentage of chemical oxygen demand (COD) and total organic carbon (TOC) was determined to evaluate the mineralization of RA during photodecolorization. Maximum decolorization, COD removal and total organic carbon (TOC) reduction were 88%, 75% and 68% respectively, under the optimum conditions.

Original languageEnglish
Pages (from-to)331-337
Number of pages7
JournalPowder Technology
Volume224
DOIs
Publication statusPublished - Jul 2012
Externally publishedYes

Fingerprint

Zinc Oxide
Zinc oxide
Chemical oxygen demand
Irradiation
Photocatalysts
Nanoparticles
Organic carbon
X ray powder diffraction
Coloring Agents
Dyes
Crystallite size
Energy dispersive spectroscopy
Silver
Electron microscopes
Spectroscopy
Scanning
Catalysts

Keywords

  • AgI-ZnO nanoparticles
  • Photocatalysis
  • Rosaniline
  • Visible light

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Photocatalytic activity of AgI sensitized ZnO nanoparticles under visible light irradiation. / Vignesh, K.; Suganthi, A.; Rajarajan, M.; Sara, S. A.

In: Powder Technology, Vol. 224, 07.2012, p. 331-337.

Research output: Contribution to journalArticle

Vignesh, K. ; Suganthi, A. ; Rajarajan, M. ; Sara, S. A. / Photocatalytic activity of AgI sensitized ZnO nanoparticles under visible light irradiation. In: Powder Technology. 2012 ; Vol. 224. pp. 331-337.
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