Preparation and Structural Characterization of SiO2-ZrO2 Aerogels

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Low density SiO2-xZrO2 aerogels with x=35wt%, 65wt%, 75wt%, 90wt%, 95wt% were prepared by CO2 supercritical drying technique with tetraethylorthosilicate (TEOS) and zirconyl nitrate dihydrate (ZrO(NO3)2 .2H2O) by hydrolytic polycondensation under different chemical conditions. The prepared aerogels are performed by X-ray Diffraction (XRD), Transmission electron microscopy (TEM), Fourier transformed infrared spectroscopy (FT-IR) and BET surface areas to characterize and analyze the morphology and pore structure of SiO2-ZrO2 aerogels. The results showed that the SiO2-ZrO2 areogels are the typical of nano mesopores and the average pore size is about 50 nm. The specific surface areas varied from 345.5 to 615.5 m2/g with (SBET)MAX = 615.5 m2/g with 20wt% Zirconia; Moreover a mass of Si-O-Zr bands formed in the aerogels and the formation mechanism of Si-O-Zr bands are also discussed.

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Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

2282-2285

DOI:

10.4028/www.scientific.net/KEM.336-338.2282

Citation:

X. D. He et al., "Preparation and Structural Characterization of SiO2-ZrO2 Aerogels", Key Engineering Materials, Vols. 336-338, pp. 2282-2285, 2007

Online since:

April 2007

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$35.00

[1] L. Kocon, F. Despetis, J. Phalippou: J. Non-Cryst. Solids Vol. 225 (1998), p.96.

[2] J. Fricke, T. Tillotson: Thin Solid Films Vol. 297 (1997), p.212.

[3] D. Haranath, P.B. Wagh, G.M. Pajonk, et al.: Mater. Res. Bull. Vol. 32 (1997), p.212.

[4] S.K. Kang, S.Y. Choi: J. Mater. Sci. Vol. 35 (2000), p.4971.

[5] J.M. Blackburn, D.P. Long, A. Cabanas and J.J. Watkins: Science Vol. 294 (2001), p.141.

[6] L. Wang, M. Rocci-Lane, P. Brazis, et al.: J. Am. Chem, Soc. Vol. 122 (2000), p.6629.

[7] D. P. Long, J. M. Blackburn and J. J. Watkins: Adv. Mater. Vol. 12 (2000), p.913.

[8] D.M. Smith, R. Deshpanda and C.J. Brinker: Mater. Res. Soc. Symp. Proc. Vol. 271 (1992), p. l567.

[9] K.S.W. Sing, D.H. Everett, R.A. Haul: Pure Appl. Chem. Vol. 57 (1985), p.603.

[10] M. Toba, F. Mizukami, S. Kiwa: J. Mol. Catal. Vol. 94 (1994), p.85.

[11] L. Lan, G. Gnappi, A. Montenero: J. Mater. Sci. Vol. 28 (1993), p.2119.

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