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Carbon-doped titanium oxide (C/Ti–O) films were prepared on Si(100) wafer, stainless steel (type 304) and glass by reactive magnetron sputtering (RMS) using CO2 gas as carbon and oxygen source under room temperature (RT). X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to analyze structure and composition of the as-prepared C/Ti–O film. It could be observed from XRD that the as-prepared C/Ti–O film contained TiO crystal phase structure. Ti2p XPS spectrum of the as-prepared C/Ti–O film showed that the valences of titanium were made up of Ti2+, Ti3+ and Ti4+. C1s XPS spectrum revealed that carbon was doped into titanium oxide based on the existence of the typical Ti–C bond. The optical absorption curve by ultraviolet–visible (UV–Vis) spectrophotometer showed that the C/Ti–O film appeared the remarkable red shift of absorption edge, which contributed to C substitution in O sites in amorphous TiO2. Photocatalysis test using methyl orange (MO) as indicator confirmed that the as-prepared C/Ti–O film had photocatalytic activity. Combined with the results of the tests and first-principles calculations, a potential photocatalysis mechanism was proposed.


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Structure and composition study of carbon-doped titanium oxide film combined with first principles

Show Author's information Wei MAIaFeng WENa( )Dong XIEbYongxiang LENGbZhonglin MUc
Key Lab of Advanced Materials of Tropical Island Resources of Ministry of Education, School of Materials and Chemical Engineering, Hainan University, Haikou 570228, P.R.China
Key Lab of Advanced Technologies of Materials, Ministry of Education, Chengdu 610031, P.R.China
Hainan Medical University, Haikou 571199, P.R.China

Abstract

Carbon-doped titanium oxide (C/Ti–O) films were prepared on Si(100) wafer, stainless steel (type 304) and glass by reactive magnetron sputtering (RMS) using CO2 gas as carbon and oxygen source under room temperature (RT). X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to analyze structure and composition of the as-prepared C/Ti–O film. It could be observed from XRD that the as-prepared C/Ti–O film contained TiO crystal phase structure. Ti2p XPS spectrum of the as-prepared C/Ti–O film showed that the valences of titanium were made up of Ti2+, Ti3+ and Ti4+. C1s XPS spectrum revealed that carbon was doped into titanium oxide based on the existence of the typical Ti–C bond. The optical absorption curve by ultraviolet–visible (UV–Vis) spectrophotometer showed that the C/Ti–O film appeared the remarkable red shift of absorption edge, which contributed to C substitution in O sites in amorphous TiO2. Photocatalysis test using methyl orange (MO) as indicator confirmed that the as-prepared C/Ti–O film had photocatalytic activity. Combined with the results of the tests and first-principles calculations, a potential photocatalysis mechanism was proposed.

Keywords:

C/Ti–O films, carbon-doped, magnetron sputtering, first principles
Received: 23 October 2013 Revised: 04 January 2014 Accepted: 08 January 2014 Published: 05 March 2014 Issue date: March 2014
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Publication history
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Publication history

Received: 23 October 2013
Revised: 04 January 2014
Accepted: 08 January 2014
Published: 05 March 2014
Issue date: March 2014

Copyright

© The author(s) 2014

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 51062002 and 81171462), National Science Fund of Hainan Province (No. 511113) and Key Project of Science and Technology Planning of Hainan Province (No. ZDXM20110051).

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