skip to main content

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

Highlights: • Synthesis of supported Ag NPs on ZnO nanorods using open vessel microwave reactor. • Use of the Ag/ZnO NPs as an efficient visible light photocatalyst. • Complete degradation of methylene blue in 1 h with 0.5 g/L Ag/ZnO NPs. - 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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [4]
  1. Virginia Commonwealth University-Qatar, Doha (Qatar)
  2. Virginia Commonwealth University, Richmond, VA (United States)
  3. Qatar University, Doha (Qatar)
  4. Chair in Nanotechnology, Water Research Center, Sultan Qaboos University, P.O. Box 33, Al-Khoudh-123 (Oman)
Publication Date:
OSTI Identifier:
22420835
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 63; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRON MICROSCOPY; EMISSION SPECTROSCOPY; FOURIER TRANSFORMATION; INFRARED SPECTRA; IRRADIATION; METHYLENE BLUE; NANOPARTICLES; NANOSTRUCTURES; PHOTOCATALYSIS; PHOTOLUMINESCENCE; PRECIPITATION; SEMICONDUCTOR MATERIALS; SILVER; SYNTHESIS; VISIBLE RADIATION; X-RAY DIFFRACTION; ZINC NITRATES; ZINC OXIDES