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首页> 外文期刊>Advanced Functional Materials >Enhanced Adsorption of Ammonia on Metal-Organic Framework/Graphite Oxide Composites: Analysis of Surface Interactions
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Enhanced Adsorption of Ammonia on Metal-Organic Framework/Graphite Oxide Composites: Analysis of Surface Interactions

机译：氨在金属-有机骨架/氧化石墨复合材料上的吸附增强：表面相互作用的分析

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摘要

Composites of the metal-organic framework (MOF), MOF-5, and graphite oxide (CO) with different ratios of the two components are prepared and tested in ammonia removal under dry conditions. The parent and composite materials are characterized before and after exposure to ammonia by sorption of N_2, X-ray diffraction, thermal analyses, and FT-IR spectroscopy. The results show a synergetic effect resulting in an increase in the ammonia uptake compared to the parent materials. It is linked to enhanced dispersive forces in the pore space of the composites. Additionally, ammonia interacts with zinc oxide tetrahedra via hydrogen bonding and is intercalated between the layers of CO. Retention of a large quantity of ammonia eventually leads to a collapse of the MOF-5 structure in the composites. The effect resembles that observed when MOF-5 is exposed to water. Taking into account the similarity of ammonia and water molecules, it is hypothesized that ammonia causes a destruction of the MOF-5 and composite structure as a result of its hydrogen bonding with the zinc oxide clusters.
机译：制备具有两种组分不同比例的金属有机骨架（MOF），MOF-5和氧化石墨（CO）的复合材料，并在干燥条件下进行氨气去除测试。通过吸附N_2，X射线衍射，热分析和FT-IR光谱对母体和复合材料在暴露于氨之前和之后进行表征。结果表明，与母体材料相比，协同作用导致氨吸收增加。它与增强复合材料孔隙中的分散力有关。另外，氨通过氢键与氧化锌四面体相互作用，并插入到CO层之间。大量氨的保留最终导致复合材料中MOF-5结构的破坏。该效果类似于MOF-5暴露于水时观察到的效果。考虑到氨和水分子的相似性，假设氨由于其与氧化锌团簇的氢键作用而导致MOF-5和复合结构的破坏。

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  • 来源
    《Advanced Functional Materials》 |2010年第1期|111-118|共8页
  • 作者

    Camille Petit; Teresa J. Bandosz;

  • 作者单位

    Department of Chemistry The City College and the Graduate School City University of New York 160 Convent Avenue, New York, NY 10031 (USA);

    rnDepartment of Chemistry The City College and the Graduate School City University of New York 160 Convent Avenue, New York, NY 10031 (USA);

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