Aerogel nanoscale magnesium oxides as a destructive sorbent for toxic chemical agents

Abstract

An autoclave hypercritical drying procedure has been used to prepare precursors of MgO from Mg(OCH 3 ) 2 . This material was prepared with a speci c surface area of 1200 m 2 g 1 . The dehydrated materials consisted of much smaller crystallites than conventionally prepared MgO and were free of OCH 3 groups . The precursors and samples of magnesium oxide were taken for experimental evaluation of their reactivity with mustard. The largest percentage of the conversion mustard into non-toxic products after the elapse of the reaction was 77%.

MgO nanoparticles as antibacterial agent: preparation and activity

“…The advantages of the sol-gel method are simplicity, cost effectiveness, high yield of nanoparticles, and low reaction temperature (Jiu et al, 2003;Bokhimi et al, 1999;Subramania et al, 2007). Stengl et al (2004) described the preparation of magnesium hydroxide aerogels on the basis of the hydrolysis and condensation reactions of the alkoxide. Magnesium oxide aerogels with surface areas of ~ 537 m 2 /g were obtained.…”

Nanostructured Metal Oxides for Stoichiometric Degradation of Chemical Warfare Agents

“…Stengl et al used an improved hypercritical drying method to prepare nanosized MgO with surface area greater than 1200 m 2 g −1 (Stengl et al 2003 ). The highest percentage of the conversion of HD into harmless products after the completion of (Stengl et al 2004 ). The particle morphology and texture of the material are also important factors that depend on its specifi c surface area and porosity.…”

“…Houskova and Stengl (Houskovs et al 2007 ;Houskova et al 2007 ) prepared nanosized ZnO by homogeneous hydrolysis with thioacetamide heated at a temperature of 400 °C, which showed good decomposition of the HD, and its reactivity was superior to that of AP-MgO (Stengl et al 2004 ). Mesoporous CuO-ZnO binary metal oxide was used as a decontaminant against HD (Kumar et al 2013 ).…”

Reaction of sulfur mustard gas, soman and agent VX with nanosized anatase TiO2 and ferrihydrite

“…The detoxification capability of those highly dispersed oxides (eg MgO, CaO, ZnO, AlO x (HO) y , ZrO, TiO 2 ) has been extensively studied and reported. 1 -5 The reactivity with warfare agents of the nanosized MgO particles prepared by an autoclave hypercritical drying procedure from Mg(OCH 3 ) 6 and nanosized alumina (α-Al 2 O 3 ) 7 from aluminium sec butoxide has been studied.…”