Effects of trap density on the surface-enhanced Raman scattering of molecules adsorbed on TiO2 (Degussa P25)
Article first published online: 15 JUL 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 43, Issue 12, pages 1920–1923, December 2012
How to Cite
Zhang, Z. L., Li, D. N. and Mao, Y. L. (2012), Effects of trap density on the surface-enhanced Raman scattering of molecules adsorbed on TiO2 (Degussa P25). J. Raman Spectrosc., 43: 1920–1923. doi: 10.1002/jrs.4128
- Issue published online: 14 DEC 2012
- Article first published online: 15 JUL 2012
- Manuscript Accepted: 11 MAY 2012
- Manuscript Revised: 22 APR 2012
- Manuscript Received: 10 MAR 2012
- trap density;
- surface-enhanced Raman scattering;
- TiO2 (Degussa P25);
The surface-enhanced Raman scattering (SERS) of molecules on TiO2 (Degussa P25) was investigated. The variation of trap density was carried out by the calcination of TiO2 at 350, 450 and 600°C. We found that the SERS intensity increases first, and then decreases with the calcination temperature rising from 350 to 450°C and 450 to 600°C, respectively. The measurements indicate that the trap density increases with the calcination temperature rising. The results indicate that the increase of trap density is favorable for the increase of SERS enhancement. The increase of SERS intensity from 350 to 450°C could be due to the dominated contribution from the trap density increase, and the decrease from 450 to 600°C could be due to dominated contribution from the increase of the crystallite size and the mass fraction of rutile phase. Copyright © 2012 John Wiley & Sons, Ltd.