Effect of Adsorbed Water and Surface Hydroxyls on the Hydrolysis of VX, GD, and HD on Titania Materials: The Development of Self-Decontaminating Paints

详细信息    查看全文

• 作者：George W. Wagner ; Gregory W. Peterson ; John J. Mahle
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：March 7, 2012
• 年：2012
• 卷：51
• 期：9
• 页码：3598-3603
• 全文大小：310K
• 年卷期：v.51,no.9(March 7, 2012)
• ISSN：1520-5045

文摘

Titania materials such as anatase (TiO₂), nanotubular titania (NTT), and nanocrystalline titania (nTiO₂) exhibit extremely short half-lives for VX, provided adequate surface-adsorbed water is present. The effect of coadsorbed water on the hydrolytic activity of these materials toward VX, GD, and HD was assessed to select the most promising candidate for study in self-decontaminating paints and coatings. The best candidate is nTiO₂, primarily chosen for its extremely short VX half-life at quite high water-content. For the most part, imbedding nTiO₂ into various coatings negatively impacts its reactivity. A notable exception is observed for the case of HD and nTiO₂/Wax (a paint simulant), where a somewhat shorter half-life is observed compared to the nascent nTiO₂ powder. However, encrusting a painted surface with nTiO₂ powder, leaving it partly exposed rather than wholly imbedded, results in improved reactivity.