Electrodeposited multi-walled carbon nanotubes on Ag-loaded TiO2 nanotubes/Ti plates as a new photocatalyst for dye degradation

MWCNTs/Ag/TiO 2 NTs plates were synthesized via electrochemical reduction of functionalized multiwalled carbon nanotubes (MWCNTs) on Ag/TiO 2 NTs. The loading of silver nanoparticles was carried out by electroless reduction of Ag 1+ onto TiO 2 nanotubes previously formed by anodizing titanium. The S...

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Bibliographic Details
Published in:RSC advances 2015-01, Vol.5 (56), p.4484-44846
Main Authors: Mohaghegh, Neda, Faraji, Masoud, Gobal, Fereydoon, Gholami, Mohammad Reza
Format: Article
Language:English
Subjects:
Degradation
Dyes
Nanotubes
Plates
Reduction
Silver
Titanium
Titanium dioxide
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Summary:MWCNTs/Ag/TiO 2 NTs plates were synthesized via electrochemical reduction of functionalized multiwalled carbon nanotubes (MWCNTs) on Ag/TiO 2 NTs. The loading of silver nanoparticles was carried out by electroless reduction of Ag 1+ onto TiO 2 nanotubes previously formed by anodizing titanium. The SEM analysis revealed that MWCNTs were loaded significantly on the as-prepared Ag/TiO 2 NTs, where nanoparticles of Ag had grown on the walls of TiO 2 NTs. The photocatalytic activity of the synthesized plates was evaluated by the photodegradation of Methyl Orange (MO) dye under UV light irradiation. The results indicated that the MWCNTs/Ag/TiO 2 NTs demonstrated improved efficiency for MO photodegradation in comparison with Ag/TiO 2 NTs and TiO 2 NTs. This is attributed to the efficient separation and transfer of photogenerated electron-hole pairs. The chemical oxygen demand of an MO dye solution as measured at specified time intervals provides a good idea about the degradation of MO. MWCNTs/Ag/TiO 2 NTs plates were synthesized via electrochemical reduction of functionalized multiwalled carbon nanotubes (MWCNTs) on Ag/TiO 2 NTs.
ISSN:2046-2069
DOI:10.1039/c5ra03359d