Preparation and Utilization of MnO2 Nanoparticles (NPs) Catalyst for the Decontamination against Chemical Warfare Nerve Agent Simulant (CWNAS)

International Journal of Bio-Inorganic Hybrid Nanomaterials

مقاله 7، دوره 3، شماره 2، تیر 2014، صفحه 117-123   

نوع مقاله: Research Paper

چکیده

In this scientific research, MnO2 nanoparticles (NPs) have been successfully prepared by a precipitation method using KMnO4, MnSO4.H2O and H2O2 (30%) as the precursors. As-prepared sample was identified by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and Infrared (IR) techniques. The transmission electron microscopy (TEM) showed 7-8 nm ranges size of as prepared MnO2 nanoparticles. The decontamination reaction of triethyl phosphate (TEP) as a chemical warfare nerve agent simulant (CWNAS) was carried out on the surface of MnO2 NPs as the sorbent catalyst with the different weight ratios of TEP/MnO2 (1:8, 1:16 and 1:32) and studied by using phosphorous-31 nuclear magnetic resonance spectroscopy (31PNMR) technique. The 31PNMR analysis results proved that more than 95% of TEP was adsorbed on this catalyst in decane solvent with ratio of 1:32 after the elapse of the reaction time (8 h) at room temperature (25±1°C). On the other hand, decontaminated agent simulant amounts for the ratios of 1:16 and 1:8 were lower under similar conditions, respectively. This sorbent catalyst provides enough surface area and enhanced chemical reactivity for instantaneous adsorption and decontamination of TEP.

کلیدواژه‌ها

MnO2 Nanoparticles (NPs)؛ Precipitation؛ catalyst؛ Decontamination؛ Nerve agent simulant؛ Triethyl phosphate (TEP)؛ Adsorption