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Photocatalytic activity of titania layer prepared by oxidizing titanium compounds on titanium plate surface

Paper ID Volume ID Publish Year Pages File Format Full-Text
46281 46436 2012 7 PDF Available
Title
Photocatalytic activity of titania layer prepared by oxidizing titanium compounds on titanium plate surface
Abstract

Anatase-type nanocrystalline titania layers were prepared by oxidizing the crystalline titanium nitride and carbon-doped titanium nitride phases prepared on a titanium plate surface. Identification of the crystalline phase was confirmed by the XRD patterns and Raman spectra of these plates. The photocatalytic activity of the plates was evaluated by observing the photocalytic degradation process of acetaldehyde gas during UV irradiation by gas chromatography. A relatively larger amount of the anatase phase was formed on the very thin surface layer by heating the carbon-doped titanium nitride phase at 500 °C, and it exhibited a higher photocatalytic activity for the acetaldehyde degradation. The activity was determined not only by the amount of the anatase phase, but also by the crystallite size depending on the surface area and charge transfer efficiency. The photocatalytic activity is suggested to be due to the anatase phase existing on the thin surface layer accessible to the reactants.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Anatase titania was prepared by oxidizing the crystalline TiN and C-doped TiN phases. ► The crystalline phase was identified by XRD analysis and Raman spectroscopy. ► Anatase phase exhibited a high photocatalytic activity for acetaldehyde degradation. ► The activity was also determined by the crystallite size. ► The activity is due to the thin surface anatase layer accessible to the reactants.

Keywords
Titania; Photocatalysis; Oxidation; Titanium nitride; Carbon-doped titanium nitride
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 127, 30 October 2012, Pages 227–233
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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