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Copper Hydroxyl Nitrate/Graphite Oxide Composite as Superoxidant for the Decomposition/Mineralization of Organophosphate‐Based Chemical Warfare Agent Surrogate
Author(s) -
ArcibarOrozco Javier A.,
Giannakoudakis Dimitrios A.,
Bandosz Teresa J.
Publication year - 2015
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201500215
Subject(s) - copper , materials science , mineralization (soil science) , adsorption , fourier transform infrared spectroscopy , thermal decomposition , catalysis , oxidizing agent , graphite , composite number , inorganic chemistry , decomposition , oxide , nuclear chemistry , chemical engineering , chemistry , organic chemistry , composite material , metallurgy , nitrogen , engineering
Dimethyl chlorophosphate (DMCP) is a surrogate of G‐series organophosphate nerve agents. The destruction of DMCP over copper hydroxyl nitrate (CuON) and copper hydroxyl nitrate/graphite oxide composite (CuONGO) is studied. The extent of interactions between DMCP and the adsorbent surface is monitored by Fourier transform infrared spectroscopy in a total attenuated reflectance mode at several predetermined time exposures. Thermal analysis/mass spectrometry is also used to determine the reactive adsorption process. Here, a gradual replacement of NO 3 − groups by Cl − and/or CO 3 − indicating the mineralization of DMCP to form CuCl 2 and CuCO 3 is shown. Even though more DMCP is reactively adsorbed on CuON, its decomposition is faster on CuONGO. Detected NO 2 , which is formed as an intermediate, causes the conversion of an unevaporated DMCP liquid to H 3 PO 4 , as supported by MS results. This mineralization of DMCP happens via an indirect contact with the catalyst. Thus, CuON and CuONGO are considered as highly powerful media for the decontamination of chlorophosphate‐based nerve agents.