화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.100, 75-91, August, 2021
DOI10.1016/j.jiec.2021.05.039  Export Citation
Ultraviolet and infrared light decontamination and the secondary pollution products of G-series nerve agent simulant model molecules contaminating TiO2/Ti surfaces
Ju Hyun Yang1, 2, So Jeong Park1, Sung-Min Hong1, 2, Jeongkwon Kim1, Ki-Ju Yee3, Heesoo Jung4, and Youngku Sohn1, 2, †
  • 1Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
  • 2Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
  • 3Department of Physics, Chungnam National University, Daejeon 34134, Republic of Korea
  • 4Agency for Defense Development (ADD), Yuseong P.O. Box 35, Daejeon 34602, Republic of Korea
E-mail:
Ultraviolet (UV) photodecontamination of chemical warfare agents (CWAs) has been an attractive way for decontamination of target areas unapproachable by a wet chemical method. Herein, decontamination was demonstrated using UV and infrared lamps and a home-built scanning 266-nm pulse laser under air and N2 conditions for the G-series nerve agent simulant model molecules of dimethyl methylphosph- onate, dimethyl phosphite, diethyl methylphosphonate, and diethyl phosphite contaminatingTiO2/Ti sheets. Volatile secondary photodecomposition products were examined by gas chromatography and mass spectrometry, and nonvolatile surface residues by X-ray photoelectron spectroscopy, energydispersive X-ray spectroscopy, X-ray diffraction crystallography, and Fourier-transform infrared spectroscopy. The wavelength- and power-dependent mechanisms of the formation of diverse secondary products, the role of active O2 -, h+ and ㆍOH species, and the mechanisms of dissociative adsorption and photodecontamination were fully discussed and found valuable for the development of a remote laser photodecontamination method applicable to diverse CWA-contaminated target areas.
Keywords:G-series nerve agent;Dimethyl methylphosphonate;Photodecontamination mechanism;Gas chromatography;Remote decontamination
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