Synthesis of supported silver nano-spheres on zinc oxide nanorods for visible light photocatalytic applications

Khaled Saoud, Rola Alsoubaihi, Nasr Bensalah, Tanujjal Bora, Massimo Bertino, Joydeep Dutta

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

We report the synthesis of silver (Ag) nano-spheres (NS) supported on zinc oxide (ZnO) nanorods through two step mechanism, using open vessel microwave reactor. Direct reduction of ZnO from zinc nitrates was followed by deposition precipitation of the silver on the ZnO nanorods. The supported Ag/ZnO nanoparticles were then characterized by electron microscopy, X-ray diffraction, FTIR, photoluminescence and UV-vis spectroscopy. The visible light photocatalytic activity of Ag/ZnO system was investigated using a test contaminant, methylene blue (MB). Almost complete removal of MB in about 60 min for doses higher than 0.5 g/L of the Ag/ZnO photocatalyst was achieved. This significant improvement in the photocatalytic efficiency of Ag/ZnO photocatalyst under visible light irradiation can be attributed to the presence of Ag nanoparticles on the ZnO nanoparticles which greatly enhances absorption in the visible range of solar spectrum enabled by surface plasmon resonance effect from Ag nanoparticles.

Original languageEnglish
Pages (from-to)134-140
Number of pages7
JournalMaterials Research Bulletin
Volume63
DOIs
Publication statusPublished - 2015

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Keywords

  • Metal-semiconductor composite
  • Photocatalysis
  • Silver nanoparticles
  • Supported catalyst
  • ZnO nanorods

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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