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Orientated growth of copper-based MOF for acetylene storage
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2018-09-20 , DOI: 10.1016/j.cej.2018.09.148
Zhanke Wang , Lei Ge , Mengran Li , Rijia Lin , Hao Wang , Zhonghua Zhu

Manipulating crystal growth of metal-organic frameworks (MOFs) has great potential in achieving unique properties for adsorption, separation and catalysis applications. For the first time, we used Mg/Al layered double hydroxide (LDH) nanosheets as modulators to tune the growth orientation of HKUST-1 without either pore blockage or crystallinity degradation. Through the introduction of LDH during hydrothermal process, HKUST-1 crystal shape transfers from octahedron with fully exposed {1 1 1} facets to tetrakaidecahedron with both {1 0 0} and {1 1 1} facets. The exposure of {1 0 0} facet with large pore size facilitates the activation of MOF, thereby providing more open metal sites. As a result, the micropore volume and BET surface area increase remarkably from 0.75 cm3/g to 1.01 cm3/g and 2255 m2/g to 3001 m2/g, respectively. The tetrakaidecahedral HKUST-1 exhibits high acetylene uptake of 275 cm3 (STP)/g at 298 K and 1 atm, which is the highest value ever reported to the best of our knowledge.



中文翻译:

乙炔储存铜基MOF的定向生长

操纵金属有机骨架(MOF)的晶体生长在实现吸附,分离和催化应用的独特性能方面具有巨大潜力。首次,我们使用Mg / Al层状双氢氧化物(LDH)纳米片作为调节剂来调节HKUST-1的生长方向,而不会堵塞孔洞或降低结晶度。通过在水热过程中引入LDH,HKUST-1晶体的形状从具有完全暴露的{1 1 1}面的八面体转变为具有{1 0 0}和{1 1 1}面的十四面体。孔径大的{1 0 0}小平面的暴露促进了MOF的活化,从而提供了更多的开放金属位点。结果,微孔体积和BET表面积从0.75cm 3 / g显着增加至1.01cm 3。/ g和2255 m 2 / g至3001 m 2 / g。十四面体HKUST-1在298 K和1 atm时显示出275 cm 3(STP)/ g的高乙炔吸收率,据我们所知,这是有史以来的最高值。

更新日期:2018-09-20
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