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Tungsten and nitrogen co-doped TiO2 nano-powders with strong visible light response

Paper ID Volume ID Publish Year Pages File Format Full-Text
48149 46495 2008 9 PDF Available
Title
Tungsten and nitrogen co-doped TiO2 nano-powders with strong visible light response
Abstract

A two-step method, combining with sol–gel and mechanical alloying (MA) method, was used to fabricate the tungsten and nitrogen co-doped TiO2 nano-powders ((W, N) co-doped TiO2 NPs). The (W, N) co-doped TiO2 NPs showed strong absorbance in visible range, as long as 650 nm. Enhanced photocatalytic activities under visible light irradiation were also observed from the results of photodegradation experiments and chemical oxygen demand (COD) analysis. Physical, chemical, and optical properties of the samples were investigated. Possible reasons for the enhanced photocatalytic activities were analyzed based on the experimental results. Oxygen vacancies detected by electron spin response (ESR) spectra, acting as trapping agencies for electrons (e−) to produce active oxygen species (O2−), were proved to be the main cause for the improved photocatalytic performances.

Keywords
TiO2; Co-doped; Two-step method; COD
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Tungsten and nitrogen co-doped TiO2 nano-powders with strong visible light response
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 83, Issues 3–4, 23 September 2008, Pages 177–185
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
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Any Questions? feel free to contact us