Encapsulation of Heteropolyanion-Based Ionic Liquid within the Metal-Organic Framework MIL-100(Fe) for Biodiesel Production
Encapsulation of Heteropolyanion-Based Ionic Liquid within the Metal-Organic Framework MIL-100(Fe) for Biodiesel Production
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将杂多阴离子基离子液体封装在金属有机骨架 MIL-100(Fe) 中用于生产生物柴油
DOI：
10.1002/cctc.201402800
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发表时间：
2015
期刊：
影响因子：
4.5
通讯作者：
Liu Xiaoqin
中科院分区：
文献类型：
--
作者：
Wan Hui;Chen Chong;Wu Zuowang;Que Yigen;Feng Yu;Wang Wei;Wang Lei;Guan Guofeng;Liu Xiaoqin
提出了一种构建离子液体、多金属氧酸盐（POM）和金属有机骨架（MOF）复合材料的新策略。采用直接水热法合成了 POM 基 MOF。使用磺酸基功能化的离子液体对杂化材料进行进一步改性，以实现将基于杂多阴离子的离子液体封装在MOF的笼内。通过 XRD、N2 吸附-脱附、FTIR、SEM、TEM、元素分析和 TGA 对催化剂进行了表征。结果表明，基于杂多阴离子的离子液体已成功封装在笼内，并且MIL-100（MIL=拉瓦锡研究所材料）的结构保持完整。 POM-离子液体功能化MOF具有高活性组分含量，同时具有路易斯酸位和布朗斯台德酸位，这使得油酸与乙醇的酯化反应具有较高的催化活性。采用响应面法(RSM)对酯化反应条件进行优化，相应的油酸转化率达到94.6%。该催化剂可以很容易地回收并重复使用六次，而不会显着损失活性。
A new strategy was proposed to construct the ionic liquid, polyoxometalate (POM), and metal–organic framework (MOF) composite. The POM‐based MOF was synthesized by using the direct hydrothermal method. The sulfonic acid group‐functionalized ionic liquid was used for further modification of the hybrid material to realize the encapsulation of the heteropolyanion‐based ionic liquid within the cages of the MOF. The catalysts were characterized by using XRD, N2adsorption–desorption, FTIR, SEM, TEM, elemental analysis, and TGA. The results indicated that the heteropolyanion‐based ionic liquid had been successfully encapsulated within the cages and the structure of MIL‐100 (MIL=Materials of Institut Lavoisier) remained intact. The POM–ionic‐liquid‐functionalized MOF, with high content of the active component, had both Lewis and Brønsted acid sites, which led to high catalytic activity for the esterification of oleic acid with ethanol. The esterification reaction conditions were optimized by using response surface methodology (RSM), and the corresponding conversion of oleic acid reached 94.6 %. The catalyst could be easily recovered and reused six times without significant loss of activity.