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H_2O_2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H_2O_2有助于晶粒的快速形成以及晶粒分散。
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 charac- terization 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.
作者
刘倩
申言同
刘伯潭
Liu Qian;Shen Yantong;Liu Botan(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;School of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin 300457,China)
出处
《化学工业与工程》
CAS
CSCD
2018年第6期7-12,共6页
Chemical Industry and Engineering
基金
国家科技支撑计划(2015BAC04B00)
