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2 Polish Journal of Chemical Technology

2 2006

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The texture of a binary AI2O3-GeO2 gel system

Kirszensztejn P., Marciniak P., Przekop R., Szymkowiak A., Kierzkowska A.

Polish Journal of Chemical Technology

2006

Vol. 8, nr 2

115-117

A comprehensive comparative study of binary oxide systems obtained by the sol-gel chemistry has been made. Particular attention has been paid to the texture changes. Using germanium isopropoxide and aluminium isopropoxide, binary gels with mesoporous structure have been obtained. Binary gels show a monodispersive distribution and the major contribution to the pore volume comes from the pores of diameters similar to those in the pure alumina gel.

Synthesis and properties of a binary Al2O3-GeO2 system obtained by sol-gel processes -TG-TA study in oxidizing atmosphere

Kirszensztejn P., Marciniak P., Przekop R., Szymkowiak A., Jurek K.

Polish Journal of Chemical Technology

2006

Vol. 8, nr 2

118-120

The paper is a continuation of our earlier studies related to the modification of the gel aluminium oxide with the oxides of the carbon group elements and aimed at the determination of the effect of the changes in the co-gelating component on the final structure of the binary support. The transformations taking place in the bulk gel have been described on the basis of the thermogravimetric studies carried out in the oxidizing atmosphere. The thermogravimetric results have confirmed that the gelation conditions proposed in this paper lead to getting a homogeneous gel structure in which germanium oxide enhances the gel network stability.