水热合成制备MIL-101及其改性应用现状

Preparation of MIL-101 by hydrothermal synthesis and its modified application

MIL-101是一种典型的MOFs材料,具有比表面积大、孔道结构丰富等物化特性,在气体吸附分离、催化、气体储存及药物运输等方面有巨大的应用前景.然而,MIL-101也存在纯化过程复杂、化学活性中心单一、Lewis酸性较弱等缺点,极大地阻碍了其批量生产与实际应用,因此高效制备MIL-101成为当前的研究热点.以MIL-101的结构特征为出发点,综述了纯化方式、矿化剂、反应物配比及晶化条件等因素对水热法制备MIL-101的影响.并从负载活性组分、原位合成和掺杂等方面,对其改性修饰的方法进行总结,表明可根据原料分子及吸附产物进行结构设计调控,以实现特定结构及功能.针对目前MIL-101材料在制备合成方面存在的制备成本高、循环利用率低等不足的现状,提出引入活性基团制备功能型复合材料等建议,以期望研究出高效的制备方法与普适的新型材料.

MIL-101 is a typical MOFs material with large specific surface area and rich pore structure. It has huge application prospects in gas adsorption and separation,catalysis,gas storage and drug transportation.However,MIL-101 also has the disadvantages of a complex purification process,single chemical active center, weak Lewis acidity, etc., which greatly hinder mass production and practical application.Therefore, the efficient preparation of MIL-101 has become a current research hotspot. Based on the structural characteristics of MIL-101, this article summarizes the effects of purification methods,mineralizers,reactant ratios and crystallization conditions on the hydrothermal preparation of MIL-101. The methods of modification and modification are summarized from the aspects of loading active components,insitu synthesis and doping,which show that the structure design and control can be carried out according to the raw material molecules and adsorption products to achieve specific structures and functions. In view of the high preparation cost and low cycle utilization of the current MIL-101 material in the preparation and synthesis,research suggestions such as the introduction of active groups to prepare functional composite materials are proposed,in order to develop efficient preparation methods and universal new types material.