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Au-decorated NaxH2−xTi3O7 nanobelts exhibiting remarkable photocatalytic properties under visible-light illumination

Paper ID Volume ID Publish Year Pages File Format Full-Text
47321 46467 2010 9 PDF Available
Title
Au-decorated NaxH2−xTi3O7 nanobelts exhibiting remarkable photocatalytic properties under visible-light illumination
Abstract

We demonstrated for the first time that Na-intercalated H2Ti3O7 (NaxH2−xTi3O7) NBs, prepared in the typical alkaline hydrothermal process, can effectively absorb visible light to carry out photocatalytic reactions. With the capability of effective light absorption in visible range, NaxH2−xTi3O7 NBs performed much better in the photodegradation of thionine than the other three counterpart products including H2Ti3O7, mixed Na2Ti6O13/TiO2 and anatase TiO2 under visible-light irradiations. As compared to the relevant commercial products like P-25 TiO2 and Na2Ti3O7 powders, the as-synthesized NaxH2−xTi3O7 NBs exhibited superior photocatalytic efficiency under UV illumination, demonstrating their potential as an efficient photocatalyst in relevant redox reactions. A further enhancement in the photocatalytic activity can be achieved for NaxH2−xTi3O7 NBs when Au nanoparticles of suitable amount were deposited on their surfaces. This improvement is due to the band offsets between NaxH2−xTi3O7 and Au, which may promote charge carrier separation to favor the photocatalysis. The recycling test reveals that Au-decorated NaxH2−xTi3O7 NBs could be promisingly utilized in the long-term course of photocatalysis. Furthermore, the result of performance evaluation under natural sunlight shows that the current Au-decorated NaxH2−xTi3O7 NBs can be used as highly efficient photocatalysts which may practically harvest energy from sunlight.

Keywords
Titanate; Nanobelts; Photocatalysis; Visible-light-driven; Charge separation
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Au-decorated NaxH2−xTi3O7 nanobelts exhibiting remarkable photocatalytic properties under visible-light illumination
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 97, Issues 3–4, 18 June 2010, Pages 389–397
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us