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Ag/TiO2-nanotube plates coated with reduced graphene oxide as photocatalysts

Faraji, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.surfcoat.2016.01.022
  3. Publisher: Elsevier
  4. Abstract:
  5. RGO/Ag/TiO2-nanotubes/Ti plates with high photocatalytic activity were fabricated via electrochemical reduction of graphene oxide on Ag/TiO2-nanotubes. The loading of silver nanoparticles was carried out by electroless reduction of Ag1+ onto TiO2 nanotubes previously formed by anodizing titanium. Microstructure studies show that reduced graphene oxide (RGO) layers having high surface area have been deposited on the as-prepared Ag/TiO2-nanotubes, where nanoparticles of Ag had grown on the walls of TiO2-nanotubes. The results of photocatalytic experiments demonstrate that the RGO/Ag/TiO2-nanotubes/Ti plate exhibits significantly enhanced photocatalytic activity for the photocatalytic degradation of Methylene Blue (MB) dye compared with TiO2-nanotubes plate under UV light irradiation. The enhanced photocatalytic activity of the RGO/Ag/TiO2-nanotubes/Ti plates can be attributed to the synergistic effects between RGO and Ag/TiO2-nanotubes, which can readily reduce the recombination probability of photogenerated electron/hole pairs and enhance the charge separation efficiency, leading to the higher photocatalytic performance and effectively inhibited photo-corrosion
  6. Keywords:
  7. Ag/TiO2-nanotubes ; Aromatic compounds ; Electrolytic reduction ; Graphene ; Nanoparticles ; Nanotubes ; Photocatalysis ; Reduction ; Titanium dioxide ; Yarn ; Electrochemical reductions ; High photocatalytic activities ; Methylene Blue ; Photo catalytic degradation ; Photocatalytic activities ; Photocatalytic performance ; Reduced graphene oxides (RGO) ; Silver
  8. Source: Surface and Coatings Technology ; Volume 288 , 2016 , Pages 144-150 ; 02578972 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0257897216300238