Porous structure of powders prepared with heat treatment of gels from tin (IV) and antimony (III) hydroxides

The effect of heat treatment on the parameters of the porous structure of p owders in the system Sn(IV) - Sb - O is studied. It is established that xer ogels of coprecipitated tin and antimony hydroxides dried at 360 K are micr oporous adsorbents containing particles of both crystalline and amorphous p hases. During powder heat treatment there is formation of solid solutions b ased on tin dioxide and there is redistribution of the microporous structur e into a mesoporous structure. This is accompanied by a reduction in specif ic surface and an increase in pore size.