The influence of the solutions pH on the microstructure of hydrogels of yttrium and europium oxohydrates prepared via the sol-gel method

Аннотация

Evolution of the mother liquor pH in the course of the sol-gel precipitation of hydrogels of yttrium and europium oxohydroxides has been studied at different acidity of the system and the precipitant (NaOH) concentration. The optimal pH and components concentrations have been determined; the specific surface area of 210 m²/g (yttrium hydroxide) and of 100 m²/g (europium hydroxide) has been attained under these conditions.