Fast detoxication of 2-chloro ethyl ethyl sulfide by p-type Ag₂O semiconductor nanoparticle-loaded Al₂O₃-based supports

Journal of Hazardous Materials
Meng-Wei Ma, Dong-Hau Kuo

Abstract

p-type Ag2O semiconductor nanoparticle-loaded Al2O3 or Na2SiO3/Al2O3 powders used for detoxicating the surrogate of sulfur mustard of 2-chloro ethyl ethyl sulfide (C2H5SCH2CH2Cl, 2-CEES) were investigated. Different amounts of Ag2O and Na2SiO3 on catalyst supports were evaluated. Gas chromatography with a pulsed flame photometric detector (GC-PFPD) and gas chromatography coupled with a mass spectroscopy (GC-MS) were used to monitor and identify the catalytic reactions, together with reaction products analysis. The GC analyses showed that the decontamination of 2-CEES in isopropanol solvent for 15 min was above 82% efficiency for the 0.5% Na2SiO3/Al2O3 support deposited with a Ag2O content above 2.5%. 2-(ethylthio)ethanol and 2-(ethylthio)ethanoic acid were identified as the major products after catalytic reactions. The electronic holes dominating in p-type Ag2O is proposed to provide the key component and to initiate the catalytic reactions. The electronic hole-based detoxication mechanism is proposed.

References

May 15, 2007·Journal of Hazardous Materials·G K PrasadK Sekhar
Jan 13, 2009·Journal of Hazardous Materials·T H MahatoR Vijayaraghavan
Mar 11, 2009·Journal of Hazardous Materials·G K PrasadR Vijayaraghavan
Nov 21, 2009·Journal of Hazardous Materials·Amit SaxenaPratibha Pandey
Feb 10, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Xin WangLan-Sun Zheng
Dec 19, 2012·ACS Applied Materials & Interfaces·Debabrata SarkarKalyan K Chattopadhyay

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