Nanoscale Magnesium Hydroxide and Magnesium Oxide Powders:  Control over Size, Shape, and Structure via Hydrothermal Synthesis

Abstract

Mg(OH) 2 nanocrystallines with rod-, tube-, needle-, or lamella-like morphologies have been synthesized by a hydrothermal reaction using different magnesium precursors and solvents as the reactants. The products appeared to have narrow size distributions with a monodisperse nature. Subsequent thermal decomposition at 450 °C gave nanosized MgO, which preserved well the morphological features of the Mg(OH) 2 samples. The specific surface areas of the MgO samples were determined by the BET technique, which gave a feature of high surface area generally larger than 100 m 2 /g. The channels formed in the thermal dehydroxylation process may account for this feature of the MgO nanocrystallines. CM000607E

Mg(OH)2 Nanorods Synthesized by A Facile Hydrothermal Method in the Presence of CTAB

“…Among various nanomaterials, magnesium hydroxide nanostructure has received a special interest for their attractive scientific and technological aspects in different fields. Magnesium hydroxide is used as halogen-free flame retardants for polymers, electric cables, building and decoration materials [1], preparing foodstuff starch esters [2] and treating wastewater [3]. The size and the morphology of the grain play a crucial role in all these applications.…”

Defluoridation of Bore Well Water Using Combustion Derived Nanocrystalline Magnesium Oxide

“…15 MgO is usually synthesized through hydrothermal, 16 sol-gel, 17 · 18 and thermal decomposition of magnesium hydroxide or carbonate. 19 In this paper we explore the use of the novel combustion technique 20 for the synthesis of nanocrystalline MgO and its use as a defluoridation agent (fluoride adsorbent).…”

Controlled morphological structure of magnesium oxide particles

“…In recent years, many experiments regarding magnesium oxide (MgO) based material has been conducted, advantages in distinguish applications of MgO or magnesia has been also discovered [1][2][3][4][5][6]. A great number of applications such as refractory materials [4], catalyst [1,5,[7][8][9], carbon dioxide chemisorbents [6], reflecting and anti-reflecting coating [10], toxic waste remediation [11] and additive to heavy fuel oil [2] utilized MgO powders.…”

“…However, large particle and grain size usually obtained from this route and controlling surface morphology was considered very difficult. Although hydrothermal process offers the possibility to control the particle morphology, this process usually work under high pressure condition and require a long time process [3,14]. Thus, in order to be able to control the morphology of the particle, other methodology has to be considered.…”