Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-30T23:09:37.315Z Has data issue: false hasContentIssue false
  • English
  • Français

Surface Modification and Optical Behavior of Tio2 Nanostructures.

Published online by Cambridge University Press:  11 February 2011

S.M. Prokes ,
W.E. Carlos ,
James L. Gole ,
Chunxing She  and
T. Lian
S.M. Prokes
Affiliation:
Naval Research Laboratory, Washington DC
W.E. Carlos
Affiliation:
Naval Research Laboratory, Washington DC
James L. Gole
Affiliation:
Department of Physics, Georgia Institute of Technology, Atlanta, GA
Chunxing She
Affiliation:
Department of Chemistry, Emory University, Atlanta, GA.
T. Lian
Affiliation:
Department of Chemistry, Emory University, Atlanta, GA.
Get access

Abstract

TiO2 is a very important material from the perspective of photocatalytic applications, but due to its 3.2 eV bandgap, it is not possible to make this material efficient under visible illumination. Anatase TiO2 nanoclusters in the 3 – 30 nm range have been formed by a wet chemical technique and surface modified in order to enhance the absorption of visible light. Nitridation of the highly reactive TiO2 nanosphere surface has been achieved by a quick and simple treatment in alkyl ammonium compounds and the metallization of this surface has been achieved by electroless plating. Although the structure of the resultant material remains anatase, some of the treated material exhibits strong emission between 550–560 nm, which red shifts and drops in intensity with aging in the atmosphere. Electron Spin Resonance performed on these samples identify a resonance at g=2.0035, which increases significantly with the nitridation step. This resonance is attributed to an oxygen hole center created near the surface of the nanoclusters, which correlates well the noted optical activity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 738: Symposium G – Spatially Resolved Characterization of Local Phenomena in Materials and Nanostructures , 2002 , G8.9
Copyright
Copyright © Materials Research Society 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Fujishima, A., Honda, K., Nature 238, 37 (1972).Google Scholar
[2] Fox, M.A., Dylay, M.T., Chem. Rev. 93, 341(1993).Google Scholar
[3] Ollis, D.E., “Photocatalytic Purification and Treatment of Water and Air” (Elsevier Sci. Pub., New York, 1993).Google Scholar
[4] Tang, H., Prasad, K., Sanjines, R., Schmidt, P.E. and Levy, F., J. Appl. Phys. 75, 2042 (1994).Google Scholar
[5] Hoffmann, M.R., Martin, S.T., Choi, W. and Bahnemann, D.W., Chem. Rev. 95, 69 (1995).Google Scholar
[6] Akikusa, J., Khan, S. U. M., J. Electrochem. Soc. 145, 89 (1998).Google Scholar
[7] Khaselev, O., Turner, J. A., Science 280, 425 (1998).Google Scholar
[8] Ghosh, A.K., Maruska, H.P., J. Electrochem. Soc. 124, 1516 (1977).Google Scholar
[9] Choi, W., Termin, A. and Hoffmann, M.R., J. Phys. Chem. 98, 13669 (1994).Google Scholar
[10] Breckenridge, R.G. and Hosler, W.R., Phys. Rev. 91, 793 (1953).Google Scholar
[11] Cronemeyer, D.C., Phys. Rev. 113, 1222 (1959).Google Scholar
[12] Ihara, T., Miyoshi, M., Ando, M., Sugihara, S. and Iriyama, Y., J. Mat. Sci. 36, 4201(2001).Google Scholar
[13] Sakata, T. and Kawai, T., “Energy Resources Through Photochemistry and Catalysis“, Gratzel, M., ed. (Academic Press, New York, 1983) 332–358.Google Scholar
[14] Asahi, R., Morikawa, T., Ohwaki, T., Aoki, K. and Taga, Y., Science 293, 269 (2001).Google Scholar
[15] Gole, J. et al., private communications.Google Scholar
[16] Prokes, S.M., Carlos, W.E., Seals, Lenward and Gole, James, Materials Lett. 54, 85 (2002).Google Scholar
[17] Brevet, A., Fabreguette, F., Imhoff, L., Marco de Lucas, M.cC., Heints, O., Saviot, L., Sacilotti, M. and Bourgeois, S., Surfaces and Coatings Technol. 151–152, 36 (2002.Google Scholar
[18] Nakaoka, Y. and Nosaka, Y., J. Photochemistry and Photobiology A: Chemistry 110, 299 (1997).Google Scholar
[19] Howe, R.F. and Gratzel, M., J. Phys. Chem. 91, 3906 (1987).Google Scholar
[20] Micic, O.I., Zhang, Y., Cromack, K.R., Trifunac, A.D. and Thurnauer, M.C., J. Phys. Chem. 97, 7277 (1993).Google Scholar
[21] Hirakawa, T., Kominami, H., Ohtani, B. and Nosaka, Y., J. Phys. Chem. B 105, 6993 (2001).Google Scholar
[22] Skuja, L.N. and Silin, A.R., Phys. Stat. Solidi A56, K11 (1979).Google Scholar
[23] Skuja, L., Solid State Commun. 84, 613 (1992).Google Scholar
[24] Prokes, S.M., Carlos, W.E. and Glembocki, O.J., Phys. Rev. B50, 17093 (1994).Google Scholar
[25] Prokes, S.M. and Carlos, W.E., J. Appl. Phys. 78, 2671 (1995).Google Scholar
[26] Tsybeskov, L. and Fauchet, P.M., Appl. Phys. Lett. 64, 1 (1994).Google Scholar
[27] Prokes, S.M., J. Mater. Res. 11, 305 (1996).Google Scholar