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化工学报  2015 

机械化学法合成金属有机骨架材料HKUST-1及其吸附苯性能

DOI: 10.11949/j.issn.0438-1157.20141127, PP. 793-799

Keywords: 机械化学法,HKUST-1,活化,,吸附,吸附等温线

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Abstract:

金属有机骨架材料是一类新兴纳米多孔功能材料,研究出一种绿色环保的制备和活化金属有机骨架材料方法对于其工业应用具有重要的意义。应用机械化学法合成金属有机骨架材料(HKUST-1),并提出采用乙醇对所合成的材料进行活化和纯化,讨论不同溶剂(氯仿、乙醇)活化对合成的HKUST-1的孔隙结构和吸附性能的影响。研究结果表明:相对于传统水热法合成时间(24h),无溶剂机械化学法反应时间缩短为30min;活化溶剂对HKUST-1的比表面积和孔结构有较大的影响,乙醇比氯仿更容易置换出HKUST-1孔道中残留的前驱物,增大材料的比表面积,乙醇活化得到的HKUST-1比表面积高达1442.7m2·g-1。在298K、8kPa条件下,乙醇活化得到的HKUST-1对苯的吸附容量高达6.90mmol·g-1,比氯仿活化和水热法合成的HKUST-1对苯的吸附量高约25%,而且高于同等温度压力条件下活性炭、碳分子筛、沸石等常规吸附剂对苯的平衡吸附量。

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