Improved photocatalytic activity of highly ordered TiO2 nanowire arrays for methylene blue degradation

Although many efforts have been done on the photocatalytic properties of anodic TiO2 nanotubes, much less work is done on the photocatalytic performance of TiO2 nanowires. Self-organized anodic TiO2 nanowire arrays have been fabricated using a simple electrochemical approach and used as photocatalys...

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Bibliographic Details
Published in:Materials chemistry and physics 2012-10, Vol.136 (2-3), p.789-795
Main Authors: Lv, Xiaojun, Zhang, Hao, Chang, Haixin
Format: Article
Language:English
Subjects:
High photocatalytic activity
Nitrogen doping
Photocurrent response
Photodegradation
TiO2 nanowires
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Summary:Although many efforts have been done on the photocatalytic properties of anodic TiO2 nanotubes, much less work is done on the photocatalytic performance of TiO2 nanowires. Self-organized anodic TiO2 nanowire arrays have been fabricated using a simple electrochemical approach and used as photocatalysts in photodegradation of methylene blue (MB) dyes. Here we found for the first time TiO2 nanowires have better photocatalytic properties and incident photon-to-current efficiency (IPCE) than TiO2 nanotubes. N doped TiO2 nanowires showed further enhancement in photodegradation activity and photocurrent response in the visible region. Such TiO2 nanowires are expected to have great potential in photodegradation of pollutants, photovoltaic solar energy conversion and water splitting for hydrogen generation as well. ► TiO2 nanowire arrays electrode fabricated via anodizing Ti foil. ► TiO2 nanowire arrays have higher photodegradation activity. ► N doped TiO2 nanowires enhanced visible-light photocatalytic activity.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2012.07.059