A comparison between hot-hydrolysis and sonolysis of various Mn(II) salts

A variety of manganese salts ranging from completely soluble and ionized to insoluble compounds have been subjected to ultrasonic radiation in aqueous medium at pH similar to 8.3. All of the manganese salts yielded a product identified as nanoparticles of Mn3O4, expect for MnCO3, which yields of mixture of phases. The characteristics of the products obtained are compared with those obtained under vigorous stirring conditions. The shapes of nanocrystals varied from sharp-edged crystals to smooth particles. (C) 2002 Elsevier Science B.V. All rights reserved.