Preparation method for MOF-5 metal-organic frameworks

A metal-organic framework, MOF-5 technology, applied in chemical instruments and methods, other chemical processes, hydrogen separation, etc., can solve the problems of poor interpenetrating MOF-5 crystal quality and high cost, and achieve good thermal stability. Strong hydrogen storage capacity and the effect of improving hydrogen storage capacity
CN104148019AInactive Publication Date: 2014-11-19INST OF MECHANICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF MECHANICS - CHINESE ACAD OF SCI
Publication Date
2014-11-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method for MOF-5 metal-organic frameworks of interpenetrating structures. The preparation method comprises the following steps: (1) dissolving Zn(NO3)2.6H2O and H2BDC into a DMF solvent; adding TEA (triethylamine) to produce white precipitate and then filtering, wherein a filtrate is a precursor solution; and (2) heating for 24 to 48 hours at 90 to 110 DEG C to obtain MOF-5 crystals. The preparation method integrates the advantages of a TEA direct mixing method and a solvothermal method. Firstly, a reaction solution with the relatively high concentration is required for preparing the interpenetrating structures, while the reaction solution with the relatively high concentration can damage the MOF-5 seed crystals, and the damage can be avoided by adding the TEA; secondly, the white precipitate produced after the TEA is added is removed, and a remained clarified liquor is reserved for performing reaction, so that the high crystallinity of the MOF-5 crystals is guaranteed; in addition, the TEA is also introduced into intergranular mesoporous, so that the hydrogen storage capacity of interpenetrated MOF-5 is improved. The preparation method disclosed by the invention can also be used for preparing the carbon-material-doped interpenetrated MOF-5. The MOF-5 metal-organic frameworks of the interpenetrating structures, which are prepared by the preparation method, have the high hydrogen storage capacity and the high thermal stability.
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Description

technical field

[0001] The invention relates to a method for preparing a hydrogen storage material, in particular to a method for preparing a metal organic framework MOF-5 metal. Background technique

[0002] As a clean energy, hydrogen has the advantages of high energy, low density, and wide sources. However, its flammable and explosive properties limit the application of hydrogen. Therefore, ensuring the safety of hydrogen during storage and transportation is the basic condition for its wide application. At present, hydrogen is usually liquefied by pressurization or cooling, and then stored and transported in liquid form, but the energy consumption and cost are too high. Therefore, the use of porous materials as hydrogen storage media to achieve low-cost, high-efficiency hydrogen storage and safe transportation has become a research goal.

[0003] Compared with traditional porous materials, metal-organic frameworks (MOFs) materials have the characteristics of high speci...

Claims

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