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Synchrotron-Based Studies of Transition Metal Incorporation into Silica-Based Sol-Gel Materials

Published online by Cambridge University Press:  10 February 2011

G. Mountjoy ,
D.M. Pickup ,
M.A. Holland ,
G.W. Wallidge ,
R.J. Newport  and
M.E Smith
G. Mountjoy
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, Canterbury CT2 7NF, U.K.
D.M. Pickup
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, Canterbury CT2 7NF, U.K.
M.A. Holland
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, Canterbury CT2 7NF, U.K.
G.W. Wallidge
Affiliation:
Department of Physics, University of Warwick, Coventry CV4 7AL, U.K.
R.J. Newport
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, Canterbury CT2 7NF, U.K.
M.E Smith
Affiliation:
Department of Physics, University of Warwick, Coventry CV4 7AL, U.K.
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Abstract

Previous structural studies on titania- and zirconia-silica xerogels have shown the occurrence of homogeneous mixing at low metal content, and phase separation at high metal content. The use of additional, complementary, synchrotron-based methods can contribute to a fuller structural description of these materials. We present new x-ray absorption near edge structure (XANES) and SAXS results for (ZrO2)x(SiO2)1-x, xerogels and compare them with previous results for (TiO2)x(SiO2)1-x xerogels. Significant differences between (TiO2)x(SiO2)1. and (ZrO2)X(SiO2)1-x xerogels are observed in the affects of heat treatment on the coordination of homogeneously mixed metal atoms, and in the development of phase separated metal oxide regions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 590: Symposium R – Applications of Synchrotron Radiation Techniques…V , 1999 , 83
Copyright
Copyright © Materials Research Society 2000

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References

REFERENCES

[1] Shultz, P.C. and Smyth, H.T., in Amorphous Materials, edited by EW, Douglas and B, Ellis (Wiley, London, 1972).Google Scholar
[2] Nogami, M., J. Non-Cryst. Solids 69, 415 (1985).10.1016/0022-3093(85)90043-2Google Scholar
[3] Itoh, M., Hattori, H., and Tanabe, K.J., J. Catalysis 35, 225 (1974).10.1016/0021-9517(74)90201-2Google Scholar
[4] Miller, J.B. and Ko, E.I., J. Catalysis 159, 58 (1996).10.1006/jcat.1996.0064Google Scholar
[5] Gill, R., Chemical Fundamentals of Geology (Unwin Hyman, London, 1989).Google Scholar
[6] Brinker, C.J. and Scherer, G.W., Sol-gel science: the Physics and Chemistry of Sol-gel Processing (Academic Press, San Diego, 1990)Google Scholar
[7] Mountjoy, G., Rigden, J.S., Anderson, R., Wallidge, G.W., Newport, R.J., and Smith, M.E., J. Mat. Res. submitted (1999).Google Scholar
[8] Anderson, R., Mountjoy, G., Smith, M.E. and Newport, R.J., J. Non-Cryst. Solids 232–234, 72 (1998).10.1016/S0022-3093(98)00373-1Google Scholar
[9] Pickup, D.M., Mountjoy, G., Wallidge, G.W., Anderson, R., Cole, J.M., Newport, R.J. and Smith, M.E., J. Mat. Chem. 9, 1299 (1999).10.1039/a809810gGoogle Scholar
[10] Pickup, D.M., Mountjoy, G., Wallidge, G.W., Newport, R.J. and Smith, M.E., Phys. Chem. Chem. Phys. 1, 2527 (1999).10.1039/a901401bGoogle Scholar
[11] Mountjoy, G., Pickup, D.M., Wallidge, G.W., Anderson, R., Cole, J.M., Newport, R.J. and Smith, M.E., Chem. Mater. 11, 1253 (1999).10.1021/cm980644uGoogle Scholar
[12] Farges, F., Brown, G.E., Navrotsky, A., Gan, H. and Rehr, J.J. Geochimica et Cosmochimica acta 60, 3023 (1996).10.1016/0016-7037(96)00144-5Google Scholar
[13] Farges, F., Brown, G.E., and Velde, D., Am. Mineralogist 70, 838 (1994).Google Scholar
[14] Bianconi, A., in x-ray absorption: principles, applications, techniques of EXAFS, SEXAFS andXANES, edited by D.C., Koninbsberger and , Prins R. (Wiley, New York, 1987).Google Scholar
[15] Grunes, L.A. Phys. Rev. B. 27, 2111 (1983).10.1103/PhysRevB.27.2111Google Scholar
[16] Greegor, R.B., Lytle, F.W., Sandstrom, D.R., Wong, J. and Schultz, P., J. Non-Cryst. Solids 55, 27 (1983).10.1016/0022-3093(83)90005-4Google Scholar
[17] Feigin, LA and Svergun, DI, in Structure analysis by small-angle x-ray and neutron scattering (Plenum Press, New York, 1987)10.1007/978-1-4757-6624-0Google Scholar
[18] Schmidt, P.W., J. Appl. Cryst. 24, 414 (1991)10.1107/S0021889891003400Google Scholar