Sodium X-type faujasite zeolite decomposition of dimethyl methylphosphonate (DMMP) to methylphosphonate: Nucleophilic zeolite reactions I

Yang, Szu-Wei; Doetschman, David C.; Schulte, Jürgen; Sambur, Justin B.; Kanyi, Charles W.; Fox, Jack D.; Kowenje, Chrispin O.; Jones, B. R.; Sherma, Neesha D.

doi:10.1016/j.micromeso.2005.12.018

Cited by 39 publications

(25 citation statements)

References 13 publications

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“…Among them, the use of sodium X-type faujasite zeolite for the decomposition of dimethyl methylphosphonate and in adsorption chemistry of organophosphates (Yang et al 2006;Sambur et al 2008;Meng et al 2011), adsorption and thermal reaction of dimethyl methylphosphonate onto nano-crystalline sodium-Y-type zeolite (Knagge et al 2006;Stout et al 2007), adsorption of diethyl-m-toluamide onto HY zeolite (Trouve et al 2012) and degradation of insecticide methomyl over the surface of Fe-doped ZSM-5 zeolite (Tomašević et al 2010) are worthy of notice.…”

Section: Introductionmentioning

confidence: 99%

“…As for zeolites, adsorption of toxic agents followed by degradation reaction performs thoroughly due to high adsorption capacity provided by both intrinsic porous structure of aluminumsilicate network and external functionalization with a potential catalytic reactive cation. Individually, intrinsic compositions, apparent sizes and extrinsic surface structures of nanoparticles direct a number of factors that enhance the selectivity and sensitivity of the method, namely high surface area, active Bronsted and Lewis sorption sites and chemical activity with which the adsorption and subsequent catalytic degradation may proceed (Yang et al 2006;Khajeh et al 2013). The combination of zeolites and nanomaterials causes solid catalysts in which the high surface area of nanomaterials and the adsorbent capacity provided by zeolites cooperate to increase the efficiency of the catalytic process (Khatamian et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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Manganese dioxide nanoparticles-silver-Y zeolite as a nanocomposite catalyst for the decontamination reactions of O, S-diethyl methyl phosphonothiolate

Dastafkan

Sadeghi

Obeydavi

2014

Int. J. Environ. Sci. Technol.

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The decontamination reactions of O,S-diethyl methyl phosphonothiolate, as an agricultural organophosphorous pesticide onto 20 wt% loaded manganese dioxide nanoparticles-silver-Y zeolite as a nanocomposite catalyst in different solvents, were evaluated and monitored by means of gas chromatography-flame ionization detector and gas chromatography-mass spectrometry. Prior to the reaction, the catalyst was synthesized in three steps: at first, sodium-Y zeolite was prepared by hydrothermal method; then, silver-Y zeolite was prepared from sodium-Y zeolite using ion exchange procedure; and finally, manganese dioxide nanoparticles were synthesized by in situ impregnation method by pouring the pre-prepared silver-Y zeolite into manganese(II) nitrate solution and loaded as 20 wt% onto silver-Y zeolite structure. The formation of the synthesized units and final nanocomposite catalyst was verified through scanning electron microscopy, X-ray diffraction, atomic absorption spectrometry and Fourier transform-infrared spectroscopy techniques. Gas chromatography chromatograms showed that O,S-diethyl methyl phosphonothiolate was decontaminated perfectly by the catalyst in n-heptane solvent after 8 h, at room temperature, while chloroform and isopropanol solvents and other reaction times gave lower decontamination results. Moreover, gas chromatography-mass spectrometry chromatograms confirmed the formation of ethyl methyl phosphonic acid as a major and final product, which exemplifies the role of hydrolysis reaction during the degradation progress.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Manganese dioxide nanoparticles-silver-Y zeolite as a nanocomposite catalyst for the decontamination reactions of O, S-diethyl methyl phosphonothiolate

Dastafkan

Sadeghi

Obeydavi

2014

Int. J. Environ. Sci. Technol.

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“…The original motivation of previous work [1][2][3][4][5][6][7] with Faujasite NaX zeolite was the well-known use of zeolites as adsorbers, together with the discovery that materials susceptible to nucleophilic attack react with active centers peculiar to well-dried NaX zeolite. A number of organo-phosphate and phosphonate compounds, type G and X nerve agent simulants, alkyl halides, and isocyanates have been adsorbed by NaX with subsequent nucleophilic chemistry with oxygen atoms of the Al tetrahedra on the inner surface of the zeolite supercage [1][2][3][4][5][6][7]. The potentially beneficial effects of water on the nucleophilic substitution reaction have also been demonstrated [6].…”

Section: Introductionmentioning

confidence: 99%

The room temperature chemistry of organo-sulfur esters with NaX zeolite

DeCoste

Doetschman

Schulte

et al. 2011

Microporous and Mesoporous Materials

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“…A recent study has focused mainly on the X-type and Y-type zeolites. A number of subsequent studies (9,12,13) of NaX and NaY faujasite zeolite chemistry with DMMP have been carried out by Knagge et al (12) and Yang et al (13) Their works revealed that DMMP strongly adsorbed to X-type faujasite zeolites and underwent nucleophilic substitution by supercage oxygen atoms.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Desorption Characteristics of Nanozeolites as Adsorbent for Dimethyl Methylphosphonate

2011

Sensors and Materials

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The selective adsorption of dimethyl methylphosphonate (DMMP) onto zeolites is described in this paper. Three types of zeolite, silicalite-1, ZSM (Zeolite Socony Mobil)-5, and Cu-ZSM-5, were synthesized and assembled onto the surface of a quartz crystal microbalance (QCM) covered with a Au film. The QCM was adopted as an effective tool to analyze the adsorption and desorption characteristics. The optimum desorption conditions were determined experimentally as a desorption temperature of 523 K and a desorption time of 30 min. Good repeatability could be obtained under these optimal desorption conditions. Adsorption capacity was determined by comparing the different zeolites as selective adsorbents for DMMP. Cu-ZSM-5 had the highest adsorption capacity and the best selectivity for the three zeolites. The effect of copper ions on the adsorption of DMMP was tested by synthesizing five Cu-ZSM-5 zeolites with different copper ion contents. Adsorption sensitivity increased in proportion to copper content before saturation. The sensitivity and detection limit of a QCM coated with Cu-ZSM-5 reached about 8.8 Hz/ppm and 0.3 ppm, respectively, confirming that Cu-ZSM-5 zeolite is a promising adsorbent for DMMP detection.

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Sodium X-type faujasite zeolite decomposition of dimethyl methylphosphonate (DMMP) to methylphosphonate: Nucleophilic zeolite reactions I

Cited by 39 publications

References 13 publications

Manganese dioxide nanoparticles-silver-Y zeolite as a nanocomposite catalyst for the decontamination reactions of O, S-diethyl methyl phosphonothiolate

Manganese dioxide nanoparticles-silver-Y zeolite as a nanocomposite catalyst for the decontamination reactions of O, S-diethyl methyl phosphonothiolate

The room temperature chemistry of organo-sulfur esters with NaX zeolite

Adsorption and Desorption Characteristics of Nanozeolites as Adsorbent for Dimethyl Methylphosphonate

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