Activated MIL-53(Al) for Efficient Adsorption of Dichloromethane and Trichlormethane

Activated MIL-53(Al) for Efficient Adsorption of Dichloromethane and Trichlormethane
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活化的 MIL-53(Al) 可有效吸附二氯甲烷和三氯甲烷

DOI:
10.4209/aaqr.2015.11.0651
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发表时间:
2016-08
影响因子:
4
通讯作者:
Yunlin Chen
Yunlin Chen
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Mingyang Wang;Xinghua Zhang;Lin Zhou;Yunlin Chen

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脱除溶剂和未反应配体的活化过程是金属有机骨架合成的关键步骤。MIL-53(Al)是MOF的一个亚类,通过各种合成和活化方法制备。特别是提出了一种联合活化的方法。通过样品的比表面积来评价各种活化方法的性能。通过X-射线衍射仪分析了负载诱导MIL-53(Al)的结构转变,证实了活化方法的机理。采用复合方法活化的MIL-53(Al)具有最好的吸附性能,考察了298K和101kPa时MIL-53(Al)对甲烷(CH2Cl2)和三氯甲烷(CHCl3)的吸附性能。吸附实验结果表明,MIL-53(Al)在CH2Cl2中的吸附容量大于CHCl3,这与分子模拟(大正则蒙特卡罗)的结论是一致的。
Activation process designed to remove the solvent and unreacted ligands is the key step for the synthesis of metalorganic frameworks (MOFs). MIL-53(Al), a subclass of MOFs, was prepared using various synthesis and activation methods. Especially, a combined activation method was proposed. The performance of activation methods was evaluated by the specific surface area of the samples. The mechanism of activation methods was confirmed by the loading induced structural transition of MIL-53(Al) using X-ray diffraction. MIL-53(Al) activated by the combined method has the best performance and the adsorption capacities of vaporous dichloromethane (CH_2Cl_2) and trichlormethane (CHCl_3) on this sample was investigated at 298 K and 101 kPa. The results of adsorption experiment show that MIL-53(Al) has larger adsorption capacity in CH_2Cl_2 than CHCl_3, which is consistent with the conclusion of molecular simulation (Grand Canonical Monte Carlo).
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