HISTORY --Polyakov and co workers, from Kiev

Jul 8th, 2015
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HISTORY In 1931 Polyakov and co workers, from Kiev, reported some unusual adsorption properties in silica particles prepared using a novel synthesis procedure.1 Sodium silicate had been polymerized in water using (NH4)2CO3 as the gelating agent. After two weeks, additives (benzene, toluene or xylene) had been added. The silica was subsequently allowed to dry for 20–30 days, after which the additive was removed by extensive washing in hot water. Subsequent adsorption studies revealed a higher capacity for uptake of the additive by the silica than for structurally related ligands, i.e. some kind of memory for the additive was apparent, at least in the cases of benzene and toluene

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HISTORYIn 1931 Polyakov and co workers, from Kiev, reported some unusual adsorption properties in silica particles prepared using a novel synthesis procedure.1 Sodium silicate had been polymerized in water using (NH4)2CO3 as the gelating agent. After two weeks, additives (benzene, toluene or xylene) had been added. The silica was subsequently allowed to dry for 2030 days, after which the additive was removed by extensive washing in hot water. Subsequent adsorption studies revealed a higher capacity for uptake of the additive by the silica than for structurally related ligands, i.e. some

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