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Synthesis and characterization of TiO2/Mg(OH)(2) composites for catalytic degradation of CWA surrogates

机译：TiO2 / mg（OH）（2）复合材料的合成与表征CWA替代催化降解

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摘要

Surface catalyzed reactions can be a convenient way to deactivate toxic chemical warfare agents (CWAs) and remove them from the contaminated environment. In this study, pure titanium oxide, magnesium hydroxide, and their composites TiO2/Mg(OH2) were prepared by thermal decomposition and precipitation of the titanium peroxo-complex and/or magnesium nitrate in an aqueous solution. The as-prepared composites were examined by XRD, XPS, HRTEM, and nitrogen physisorption. Their decontamination ability was tested on CWA surrogates and determined by high-performance liquid chromatography (HPLC) and gas chromatography coupled with mass spectrometry (GC-MS). Dimethyl methyl phosphonate (DMMP) was used as a G simulant for the nerve agents sarin (GB) and soman (GD) while 2-chloroethyl ethyl sulfide (2-CEES) and 2-chloroethyl phenyl sulfide (2-CEPS) were used as surrogates of sulfur mustard (HD). The activity of the as-prepared composites was correlated with acid-base properties determined by potentiometric titrations and pyridine adsorption studied by in situ DRIFTS. The mixing of Ti and Mg led to an increase of the surface area and the amount of surface -OH groups (with an increasing amount of Ti) that caused improved degradation of DMMP.
机译：表面催化反应可以停用有毒化学战剂（化学武器制剂），并从污染环境中删除的便捷方式。在这项研究中，纯二氧化钛，氢氧化镁，以及它们的复合材料的TiO 2 /镁（OH 2），通过热分解和钛过氧配合物和/或硝酸镁的沉淀在水溶液中制备的。所制备的复合材料通过XRD，XPS，HRTEM，和氮物理吸附检查。他们的去污能力上CWA替代物测试并通过高效液相色谱法（HPLC）和气相色谱与质谱联用（GC-MS）来测定。甲基膦酸二甲酯（DMMP）用作A G模拟了神经毒剂沙林（GB）和索曼（GD），而2-氯乙基乙基硫醚（2- CEES）和2-氯乙基苯基硫醚（2- CEPS）被用作替代物硫芥子气（HD）的。所制备的复合材料的活性与通过电势滴定和吡啶吸附原位DRIFTS研究确定酸碱性相关。 Ti和Mg的混合导致了改进的引起DMMP的降解的增加的表面面积的和表面的-OH基团的量（以Ti的增加量）。

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  • 来源
    《RSC Advances》 |2020年第33期|共11页
  • 作者

    Stastny Martin; Stengl Vaclav; Henych Jiri; Tolasz Jakub; Kormunda Martin; Ederer Jakub; Issa Gloria; Janos Pavel;

  • 作者单位

    Czech Acad Sci Inst Inorgan Chem Rez 25068 Czech Republic;

    Czech Acad Sci Inst Inorgan Chem Rez 25068 Czech Republic;

    Czech Acad Sci Inst Inorgan Chem Rez 25068 Czech Republic;

    Czech Acad Sci Inst Inorgan Chem Rez 25068 Czech Republic;

    Univ Jan Evangelista Purkyne Usti Nad Labem Fac Sci Ceske Mladeze 8 Usti Nad Labem 40096 Czech Republic;

    Univ Jan Evangelista Purkyne Usti Nad Labem Fac Environm Kralova Vysina 3132-7 Usti Nad Labem 40096 Czech Republic;

    Bulgarian Acad Sci Ctr Phytochem Inst Organ Chem Ak G Bontchev Str Bl9 Sofia 1113 Bulgaria;

    Univ Jan Evangelista Purkyne Usti Nad Labem Fac Environm Kralova Vysina 3132-7 Usti Nad Labem 40096 Czech Republic;

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  • 正文语种 eng
  • 中图分类 化学;
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