不同方法合成金属有机骨架材料MOF-5的比较研究

摘要针对金属有机骨架材料MOF-5的制备，采用了水热合成法、直接加入法以及在直接法中额外滴加H₂O₂的3种方法分别合成MOF-5晶体。利用X射线衍射仪（XRD）、扫描电子显微镜（SEM）、傅里叶红外光谱仪（FTIR）以及热重分析仪（TG）等仪器对MOF-5晶体进行了表征。研究了不同合成方法对其结构、形貌及热稳定性等性质的影响。结果表明：3种方法所制备的晶体XRD衍射峰与文献中MOF-5晶体的特征峰相符，即均可合成MOF-5晶体。但SEM、FTIR以及TG结果表明：水热法合成的晶体具有粒径较小和结构规则的特点，但热稳定性较差；其余2种方法合成的产物为微米级无规则聚集状晶体，与水热法相比晶体性质有一定差异。此外，滴加H₂O₂有助于晶粒的快速形成以及晶粒分散。

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	刘倩
	申言同
	刘伯潭

关键词：金属有机骨架材料； MOF-5晶体；水热合成法；直接加入法； H₂O₂

Abstract： For the preparation of metal-organic frameworks MOF-5, three different ways, hydrothermal synthesis method, direct method and direct method with adding extra H₂O₂ were used to prepare compound MOF-5 crystals. The MOF-5 crystals were characterized by X-ray diffractometer (XRD), scanning electron microscope(SEM), Fourier transform infrared spectrometer(FTIR) and thermo gravimetric analyzer (TG). The effects of different synthesis methods on the crystals structure, morphology and thermal stability of the composite were studied. The results showed that the X-ray diffraction patterns of samples of the three methods are consistent with the characteristic peaks of the MOF-5 crystals in the literatures. It means that the MOF-5 crystals can be synthesized by these methods successfully. But the other characterization results show that the crystal particle diameter synthesized by hydrothermal method is smaller and has a regular cube structure, but poorer thermal stability. As to the other two methods, the products are a kind of crystals with irregular aggregations and different properties. Furthermore, the addition of H₂O₂ is helpful to the rapid formation and dispersion of grains.

Keywords： metal-organic frameworks； MOF-5； hydrothermal synthesis； direct adding method； H₂O₂

Received 2016-06-01;

Fund:国家科技支撑计划（2015BAC04B00）。

Corresponding Authors: 刘伯潭,E-mail:liubotan@tju.edu.cn Email: liubotan@tju.edu.cn

About author: 刘倩(1990-),女,硕士研究生,现从事MOF材料及催化反应的研究。

引用本文:

刘倩, 申言同, 刘伯潭.不同方法合成金属有机骨架材料MOF-5的比较研究[J]. 化学工业与工程, 2018,35(6): 7-12

Liu Qian, Shen Yantong, Liu Botan.A Comparative Study on the Synthesis of Metal Organic Frameworks MOF-5 by Different Methods[J]. Chemcial Industry and Engineering, 2018,35(6): 7-12

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