铬-对苯二甲酸MOF的框架异构:MIL-88B(Cr)和MIL-101(Cr) |
Framework Isomerism in Chromium-Benzenedicarboxylate MOF: MIL-88B(Cr) and MIL-101(Cr) |
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摘要: 可以通过简单地控制乙酸浓度的方法,在相似的水热合成条件下合成2种同一家族的金属有机框架材料(MOFs):MIL-88B(Cr)和MIL-101(Cr)。在相对较低的乙酸浓度下,可以得到平均粒径为100 nm的MIL-101(Cr),并拥有很高的BET比表面积(3 543 m2·g-1)。而在相对较高的乙酸浓度下,则可得到另一种具有“呼吸”特性结构的MOF——MIL-88B(Cr)。利用粉末X射线衍射、扫描电镜、N2吸附-脱附分析、热重分析等对它们的结构、形貌、孔隙率等性质做了详细的分析。 |
关键词: MIL-88B(Cr) MIL-101(Cr) 金属有机框架 乙酸 |
基金项目: 国家自然科学基金(No.51802094)、湖南省自然科学基金(No.2018JJ3122)、湖湘青年人才计划项目(No.2018RS3084)和湖南省教育厅优秀青年项目(No.18B294)资助。 |
Abstract: Two metal-organic frameworks (MOFs) of the same family, MIL-88B(Cr) and MIL-101(Cr), can be prepared under similar hydrothermal synthetic conditions via adjusting the concentration of acetic acid. Nanocrystals of MIL-101(Cr) with 100 nm average size and excellent SBET (3 543 m2·g-1) were obtained at relatively lower concentrations of acetic acid, while at higher concentrations the micro-sized MIL-88B(Cr) product with ‘breathe’ structure was formed. The products were characterized by powder X-ray diffraction, scanning electron microscopy, nitrogen physisorption measurement and thermal gravimetric analysis. |
Keywords: MIL-88B(Cr) MIL-101(Cr) metal-organic frameworks acetic acid |
投稿时间:2020-08-10 修订日期:2020-10-27 |
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赵田,朱和鑫,董茗,赵熠.铬-对苯二甲酸MOF的框架异构:MIL-88B(Cr)和MIL-101(Cr)[J].无机化学学报,2021,37(1):103-109. |
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