The adsorption and photocatalytic degradation of nerve agent, isopropyl methylphosphonofluoridate, Sarin (GB) on powdery TiO 2 film has been investigated using attenuated total reflection-infrared Fourier transform spectroscopy (ATR-FTIR) in ambient atmosphere. Producing innocuous isopropyl methylphosphonic acid as a consequence of GB adsorption at the surface of TiO 2 indicates that powdery TiO 2 film is effective to hydrolyze GB. The adsorbed GB and IMPA were quickly decomposed by TiO 2 photocatalysis to give isopropanol, acetone, formate, and methylphosphonic acid, and finally completely mineralized to phosphoric acid, water, and carbon dioxide. We also elucidated a plausible adsorption structure and photocatalytic decomposition mechanism of GB at the surface of TiO 2 photocatalyst.
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Hirakawa et al. (2010) studied this question.
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