Removal of nerve agent simulant dimethyl 4-nitrophenylphosphate using metal-organic frameworks based on zirconium

Document Type : Original Article

Authors

1 a Department of Chemistry, Faculty of Sciences, Tarbiat Modares University,

2 Department of Chemistry, Faculty of Science, imam Hossein University,

10.22036/cr.2022.335031.1176

Abstract

In this study, two zirconium-based metal-organic frameworks (MOF) named UiO-66 and UiO-66(NH2) were synthesized and characterized through Fourier transform infrared (FT-IR), powder X-ray diffraction (PXRD) and N2 sorption/desorption (BET) analysis. Beside these MOFs, dimethyl 4-nitrophenylphosphate (DMNP) as a nerve agent simulant was synthesized and characterized via ultraviolet-visible (UV-Vis) spectroscopy and nuclear magnetic resonance (NMR). Due to its properties and structure similarity to phosphorus nerve agents, DMNP was selected as a less toxic alternative model, to investigation the ability of prepared MOFs for nerve agent removal. UV-Vis spectroscopy was used to monitor the DMNP concentration during the removal process. The results showed that UiO-66 and UiO-66(NH2) display high ability in catalytically hydrolysis of DMNP in the aqueous solution and neutral buffer. The removal percentage (R%) of DMNP from the organic medium was also studied and the results showed that the removal R% of 50 mL of DMNP (50 ppm) were about 76.5 and 66.8% for UiO-66 and UiO-66(NH2), respectively. Examination of the stability of the adsorbents after the adsorption process by the PXRD technique also showed that the adsorbents are recyclable.

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Iranian Journal of Chemistry
Volume 5, Issue 2 - Serial Number 9
March 2023
Pages 141-151

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History

  • Receive Date: 13 April 2022
  • Revise Date: 24 May 2022
  • Accept Date: 25 May 2022

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