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Synthesis of mesoporous nitrogen–tungsten co-doped TiO2 photocatalysts with high visible light activity

Paper ID Volume ID Publish Year Pages File Format Full-Text
46447 46440 2012 8 PDF Available
Title
Synthesis of mesoporous nitrogen–tungsten co-doped TiO2 photocatalysts with high visible light activity
Abstract

Mesoporous N,W co-doped TiO2 photocatalysts that contained various percentages of atomic tungsten dopant levels were synthesized by a facile solution combustion method which utilized urea as a nitrogen source and sodium tungstate as a tungsten source. The prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), N2 physisorption, UV–vis absorbance spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results reveal that the synthesized N and W co-doped TiO2 nanomaterials have high surface areas and mesoporous structures. In addition, the co-doping significantly narrows the band gap (∼2.7 eV) that is responsible for the high visible light response of these samples in comparison to that of pure anatase TiO2 (∼3.2 eV). The photocatalytic activity of the prepared samples was evaluated on the basis of the photodegradation rate of Rhodamine B under visible light (λ > 420). It was found that the mesoporous N,W co-doped TiO2 nanomaterials fabricated in this study exhibited high visible light activity. This significant improvement in photocatalytic activity may be attributed to the synergistic effect of the red shift in absorption combined with a high surface area.

Graphical abstract.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Synthesis N,W co-doped TiO2 photocatalysts via a facile solution combustion method. ► The fabricated N,W–TiO2 nanomaterials possess a mesoporous structure and high surface area. ► N,W co-doping significantly narrows the TiO2 energy band gap. ► The N,W–TiO2 photocatalyst exhibit superb visible light response.

Keywords
Photocatalysis; Mesoporous; TiO2; N,W co-doping; Visible light activity
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Synthesis of mesoporous nitrogen–tungsten co-doped TiO2 photocatalysts with high visible light activity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 111–112, 12 January 2012, Pages 38–45
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