Nanocolumnar titania thin films uniquely incorporated with carbon for visible light photocatalysis

Carbon-doped or carbon-covered titania can enhance photocatalytic performance under visible light. Here we report the first instance of synergistic effect of the carbon incorporation in anatase titania (TiO2−xCx:C) films with both substitutional doping and surface covered characteristics, by reactiv...

Full description

Saved in:
Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2007-11, Vol.76 (3-4), p.328-334
Main Authors: Wang, Shun-Huei, Chen, Ta-Kun, Rao, K. Koteswara, Wong, Ming-Show
Format: Article
Language:English
Subjects:
Absorption
Carbon-covered titania
Carbon-doped titania
Catalysis
Chemistry
Exact sciences and technology
General and physical chemistry
Metals
Microscopy
Photochemistry
Photodegradation
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Q1
Spectroscopy
Superhydrophilicity
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Titanium dioxide
Visible-light photocatalyst
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Carbon-doped or carbon-covered titania can enhance photocatalytic performance under visible light. Here we report the first instance of synergistic effect of the carbon incorporation in anatase titania (TiO2−xCx:C) films with both substitutional doping and surface covered characteristics, by reactively co-sputtering Ti metal and graphite targets. The nature of incorporated carbon is characterized by Raman spectroscopy, X-ray photoelectron spectroscopy and transmission electron microscopy. The absorption edge of the carbon incorporated titania thin films shifted from ultraviolet to visible region and directly depended on the carbon content. The photocatalytic performance, e.g., photodegradation of methylene blue (MB), photo-reduction of silver-ions and super hydrophilicity, was greatly enhanced with increasing carbon content. The best photocatalytic activity is obtained in the TiO2−xCx:C film of the most carbon concentration about 9.3at.% with a degradation rate-constant of 0.108h−1 for MB under visible-light illumination.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2007.06.001