Uniform and continuous V2O5 and/or TiO2 coatings on multiwalled carbon nanotubes (V2O5/TiO2-MWCNTs) were prepared by a molten salt method combined with a subsequent oxidation process. VC/TiC coatings were first deposited onto the MWCNTs by molten salt reaction and subsequently transformed in situ into V2O5/TiO2 with thickness of about 12 nm. The results showed that the composition, structure, and visible-light photocatalytic activity of the composites largely depended on the molar concentration of vanadium. Incorporation of vanadium significantly changed the chemical states of the photocatalyst surface and increased the hydroxyl groups and Ti3+ and Ti2+ ions. Both V5+ and V4+ were present in the structure. The V2O5/TiO2-MWCNTs composites showed higher removal rate and photodegradation rate for methylene blue than TiO2-MWCNTs.
Research on Chemical Intermediates – Springer Journals
Published: Apr 8, 2015
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