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Positive Effects of Impregnation of Fe-oxide in Mesoporous Al-Oxides on the Decontamination of Dimethyl Methylphosphonate

by Tae Gyun Woo 1,†, Byeong Jun Cha 1,†, Young Dok Kim 1,* and Hyun Ook Seo 2,*
1
Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea
2
Department of Chemistry and Energy Engineering, Sangmyung University, Seoul 03016, Korea
*
Authors to whom correspondence should be addressed.
These authors equally contributed to this work.
Catalysts 2019, 9(11), 898; https://doi.org/10.3390/catal9110898
Received: 27 September 2019 / Revised: 23 October 2019 / Accepted: 25 October 2019 / Published: 28 October 2019
(This article belongs to the Special Issue State-of-the-Art Catalytical Technology in South Korea)
Dimethyl methylphosphonate (DMMP) is an important simulant of organophosphates pesticides and chemical warfare nerve agents. Here, we investigated the catalytic decontamination of DMMP on Fe-oxide impregnated mesoporous Al2O3. Fe-oxide/Al2O3 sample was prepared via the temperature regulated chemical vapor deposition of Fe-oxide on mesoporous Al2O3 and post-annealing at 750 °C. The Fe-oxide/Al2O3 and bare Al2O3 samples were exposed to DMMP-containing dry air at room temperature to study the effects of Fe-oxide impregnation on the reactive adsorption of DMMP. The facilitation of DMMP degradation into CO2 and methanol at room temperature in the presence of nano-dispersed Fe-oxide was evidenced by gas-chromatograph and Fourier transform-infrared (FT-IR) absorption spectroscopy. In addition, temperature programmed oxidation (TPO) experiments and gas chromatography (Agilent, 6890) equipped with mass spectrometer (Agilent, 5973N) (GC/MS) analyses revealed that the minimum temperature that was required for total oxidation of DMMP into CO2 can also be lowered by Fe-oxide impregnation in mesoporous Al2O3. View Full-Text
Keywords: Fe-oxide; mesoporous Al2O3; dimethyl methylphosphonate; catalytic decontamination Fe-oxide; mesoporous Al2O3; dimethyl methylphosphonate; catalytic decontamination
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Woo, T.G.; Cha, B.J.; Kim, Y.D.; Seo, H.O. Positive Effects of Impregnation of Fe-oxide in Mesoporous Al-Oxides on the Decontamination of Dimethyl Methylphosphonate. Catalysts 2019, 9, 898.

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    Description: Figure S1: Background subtracted FT-IR spectra of bare Al2O3 and Fe-oxide/Al2O3 before and after 360 min of DMMP exposure at room temperature, Figure S2: GC/MS signal measured with Fe-oxide/Al2O3 and mass spectrum of ambient air, Figure S3: GC/MS signal measure with bare Al2O3.
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