Gaseous ammonia: superior to aqua ammonia in the precipitation of Mg(OH)2 under mild conditions

Abstract

Aqua ammonia (AA) is frequently used to precipitate various metal hydroxide or oxide particles. Here, we replace AA with gaseous ammonia (GA) to precipitate Mg(OH) 2 particles in MgCl 2 aqueous solution under mild conditions. The results show that GA can give a higher consistency in the growth of Mg(OH) 2 particles although both AA and GA essentially produce Mg(OH) 2 by the reaction of Mg 2+ with OH À . This work provides results that suggest using ammonia as a precipitant.

Morphology and structure of nano MgO prepared by a novel nitrogen-protective pressurization method

“…In recent decades, new materials have been developed, [1][2][3][4][5] and nano MgO is a new type of highly functional ne inorganic material 6,7 that is widely used in many elds. [8][9][10] It has different special functions, 11,12 and is a material that can be used in relation to heat, light, electricity, mechanics, and chemistry.…”