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N-doped TiO2 P25/Cu powder obtained using nitrogen (N2) gas plasma

Paper ID Volume ID Publish Year Pages File Format Full-Text
55079 47039 2012 7 PDF Available
Title
N-doped TiO2 P25/Cu powder obtained using nitrogen (N2) gas plasma
Abstract

It has been shown that the photocatalytic activity of TiO2 can be modified by deposition of Cu nanoparticles as well as doping with nitrogen. Typical procedures to induce the doping of titania are based on chemical methods. An interesting alternative is to dope titania by using N2 gas plasma in the presence of a metal. In this work, it is shown that doping of titania Degussa P25, in the presence of copper using N2 gas plasma can induce also the deposition of Cu nanoparticles. This material, known as N-doped TiO2/Cu is characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and UV–Vis diffuse reflectance. Additionally, the photocatalytic activity of the samples was evaluated by monitoring the photodegradation of methylene blue solutions using UV–Vis absorption analysis in the range 250–850 nm. The results show that this methodology of incorporating Cu into titania P25 to obtain N-doped TiO2/Cu increases its photocatalytic activity when low intensity gas plasma is used.

Graphical abstractTime evolution of the photocatalytic degradation of MB dye in aqueous solution, ln(C0/Ct), under UV radiation for different plasma input power.Figure optionsDownload full-size imageDownload high-quality image (146 K)Download as PowerPoint slideHighlights► Plasma treatment induces copper and nitrogen adsorption in titania nanostructured. ► Photocatalytic activity changes with plasma treatment. ► Low incorporated copper concentration enhances photocatalytic activity. ► High concentration of copper diminishes the photocatalytic activity.

Keywords
Degussa P25; TiO2 nanoparticles; UV/Vis irradiation; TiO2/Cu; N2 plasma; Photocatalytic activity
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N-doped TiO2 P25/Cu powder obtained using nitrogen (N2) gas plasma
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 193, Issue 1, 15 October 2012, Pages 179–185
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
Full-text PDF Download
Online Support
Any Questions? feel free to contact us