NANOSCALE METAL-OXIDE PARTICLES AS CHEMICAL REAGENTS - DESTRUCTIVE ADSORPTION OF A CHEMICAL-AGENT SIMULANT, DIMETHYL METHYLPHOSPHONATE, ON HEAT-TREATED MAGNESIUM-OXIDE

被引：129

作者：

LI, YX ^{[1
]}

KLABUNDE, KJ ^{[1
]}

机构：

[1] KANSAS STATE UNIV AGR & APPL SCI,DEPT CHEM,MANHATTAN,KS 66506

来源：

LANGMUIR | 1991年 / 7卷 / 07期

关键词：

D O I：

10.1021/la00055a017

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nanoscale particles of MgO were prepared as fine powders of varied surface areas and crystallite sizes. The capacities of these samples for dissociative (destructive) adsorption of dimethyl methylphosphonate (DMMP), a chemical agent simulant, were determined by using a pulsed microreactor. Surface stoichiometric reactions were encountered and large amounts of DMMP were destroyed, about one DMMP molecule to two surface MgO moieties. Volatile products were formic acid and methanol. Elemental analyses of the spent MgO samples coupled with Fourier transform infrared photoacoustic spectroscopy indicated that the phosphorus-containing molecular fragment was immobilized as [CH3OPCH3]ads. Effects of contact time, temperature, and surface area were studied. A proposed reaction scheme for the decomposition is given, which involved loss of CH3O followed by its oxidation by a second DMMP molecule.

引用

页码：1388 / 1393

页数：6

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