The authors successfully synthesized titanium oxide nanopowder with visible-light photocatalytic ability by low-pressure flat-flame metal organic chemical vapor condensation method. In order to confirm that carbon doping is a viable mechanism for the visible-light absorption of the powder prepared by this method, they modify the process by total exclusion of nitrogen usage to eliminate the nitrogen doping possibility. Since nitrogen is avoided in the process, the visible-light absorption cannot be due to nitrogen doping. They also found that the nanopowder formed has a single phase of anatase. Thus the nanopowder does not have anatase/rutile interface, and the authors can eliminate the possibility of visible-light absorption by the anatase/rutile interface. The visible-light absorption should thus be resort to the carbon doping. X-ray photoelectron spectroscopy studies show the presence of several carbon related bonds except Ti–C bond. This suggests that the carbon does not incorporate into the crystal and should locate on the surface of the nanopowder. Thus the carbon species act as a visible-light sensitizer for the as a photocatalyst. Among all carbon bonds the C–C bond is believed to be responsible for the light absorption, since all other carbon related bonds are not chromophores. The visible-light photocatalysis induced by carbon doping is confirmed and explained.
Skip Nav Destination
Article navigation
July 2010
Research Article|
June 29 2010
Identification of carbon sensitization for the visible-light photocatalytic titanium oxide
Y. J. Chen;
Y. J. Chen
a)
Department of Materials Science and Engineering,
National Dong Hwa University
, Shoufeng, Hualien 97401, Taiwan and Graduate Institute of Optoelectronics Engineering
, Shoufeng, Hualien 97401, Taiwan
Search for other works by this author on:
G. Y. Jhan;
G. Y. Jhan
Department of Materials Science and Engineering,
National Dong Hwa University
, Shoufeng, Hualien 97401, Taiwan and Graduate Institute of Optoelectronics Engineering
, Shoufeng, Hualien 97401, Taiwan
Search for other works by this author on:
G. L. Cai;
G. L. Cai
Department of Materials Science and Engineering,
National Dong Hwa University
, Shoufeng, Hualien 97401, Taiwan and Graduate Institute of Optoelectronics Engineering
, Shoufeng, Hualien 97401, Taiwan
Search for other works by this author on:
C. S. Lin;
C. S. Lin
Department of Materials Science and Engineering,
National Dong Hwa University
, Shoufeng, Hualien 97401, Taiwan and Graduate Institute of Optoelectronics Engineering
, Shoufeng, Hualien 97401, Taiwan
Search for other works by this author on:
M. S. Wong;
M. S. Wong
Department of Materials Science and Engineering,
National Dong Hwa University
, Shoufeng, Hualien 97401, Taiwan and Graduate Institute of Optoelectronics Engineering
, Shoufeng, Hualien 97401, Taiwan
Search for other works by this author on:
S.-C. Ke;
S.-C. Ke
Department of Physics,
National Dong Hwa University
, Shoufeng, Hualien 97401, Taiwan
Search for other works by this author on:
H. H. Lo;
H. H. Lo
Department of Physics,
National Dong Hwa University
, Shoufeng, Hualien 97401, Taiwan
Search for other works by this author on:
C. L. Cheng;
C. L. Cheng
Department of Physics,
National Dong Hwa University
, Shoufeng, Hualien 97401, Taiwan
Search for other works by this author on:
J.-J. Shyue
J.-J. Shyue
Research Center for Applied Sciences,
Academia Sinica
, Nankang, Taipei 11529, Taiwan
Search for other works by this author on:
a)
Authors to whom correspondence should be addressed; electronic mail: yjchen@mail.ndhu.edu.tw
J. Vac. Sci. Technol. A 28, 779–782 (2010)
Article history
Received:
November 02 2009
Accepted:
November 16 2009
Citation
Y. J. Chen, G. Y. Jhan, G. L. Cai, C. S. Lin, M. S. Wong, S.-C. Ke, H. H. Lo, C. L. Cheng, J.-J. Shyue; Identification of carbon sensitization for the visible-light photocatalytic titanium oxide. J. Vac. Sci. Technol. A 1 July 2010; 28 (4): 779–782. https://doi.org/10.1116/1.3278514
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00
Citing articles via
Related Content
Role of carbon in titania as visible-light photocatalyst prepared by flat-flame chemical vapor condensation method
Journal of Vacuum Science & Technology A (June 2009)
A study on heterogeneous photocatalytic degradation of various organic compounds using N-Tio2 under Uv-light irradiation
AIP Conference Proceedings (April 2018)
Solar driven photocatalytic activity of TiO2-ZnO nanocomposite
AIP Conference Proceedings (March 2019)
Enhanced visible-light photocatalytic activity of anatase TiO 2 through N and S codoping
Appl. Phys. Lett. (May 2011)
Improvement of the photocatalytic properties of TiO2 by (Fe+Mo) co-doping—A possible way to retard the recombination process
J. Appl. Phys. (September 2013)