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Metal-Organic Frameworks for the Capture of Trace Aromatic Volatile Organic Compounds
Chem ( IF 23.5 ) Pub Date : 2018-06-21 , DOI: 10.1016/j.chempr.2018.05.017
Lin-Hua Xie , Xiao-Min Liu , Tao He , Jian-Rong Li

Air pollution, typically “haze air,” is getting worse in the urban areas of many countries worldwide. The development of advanced materials for the removal of air pollutants is of great significance for protecting public health. We herein present two promising metal-organic frameworks (MOFs) that show high capture capacities for aromatic volatile organic compounds even at low pressure and high temperature, e.g. benzene uptakes of 1.65 and 0.71 mmol g−1 at 0.12 kPa and 80°C. Breakthrough experiments verify their excellent performance in capturing trace benzene in humid air, also showing them to be comparable with some benchmark materials, including Carboxen 1000, PAF-1, MIL-101(Cr), and so on. Furthermore, the capture performance is well interpreted by the single-crystal structures of guest-loaded phases, where distinct adsorption sites, multiple synergistic host-guest and guest-guest interactions, and adaptive local flexibility are disclosed.



中文翻译:

用于捕获微量芳香挥发性有机化合物的金属有机框架

在世界许多国家的城市地区,空气污染(通常是“阴霾空气”)正在日益恶化。开发用于去除空气污染物的先进材料对于保护公众健康具有重要意义。我们在此提出了两种有前途的金属有机骨架(MOF),即使在低压和高温下,它们也表现出对芳香族挥发性有机化合物的高捕获能力,例如苯的吸收量为1.65和0.71 mmol g -1在0.12 kPa和80°C的温度下。突破性实验证明了它们在潮湿空气中捕获痕量苯的出色性能,也表明它们可与某些基准材料(包括Carboxen 1000,PAF-1,MIL-101(Cr)等)媲美。此外,捕获性能可以通过客体加载相的单晶结构很好地解释,其中揭示了不同的吸附位点,多个主客体协同作用和客客体相互作用,以及自适应的局部柔韧性。

更新日期:2018-06-21
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