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A kind of preparation method of monodisperse cobalt-nickel composite mof-74

A MOF-74, monodisperse technology, applied in the direction of cobalt organic compounds, chemical instruments and methods, compounds containing elements of group 8/9/10/18 of the periodic table, etc., can solve the problem of poor stability of MOF and uneven MOF particles and other problems, to achieve the effects of narrow size dispersion, high atom utilization, and low environmental pollution

Active Publication Date: 2019-08-23
黑龙江省工研院资产经营管理有限公司
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor stability of MOF in catalysis and gas separation caused by the inhomogeneous particles of MOF prepared by the existing method, and to provide a preparation method of monodisperse cobalt-nickel composite MOF-74

Method used

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  • A kind of preparation method of monodisperse cobalt-nickel composite mof-74
  • A kind of preparation method of monodisperse cobalt-nickel composite mof-74
  • A kind of preparation method of monodisperse cobalt-nickel composite mof-74

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specific Embodiment approach 1

[0030] Embodiment 1: This embodiment is a method for preparing monodisperse cobalt-nickel composite MOF-74, which is completed according to the following steps:

[0031] 1. Preparation of MOF-74Ni:

[0032] Dissolve 2,5-dihydroxyterephthalic acid and nickel nitrate hexahydrate into solvent I to obtain a mixed solution of 2,5-dihydroxyterephthalic acid and nickel nitrate hexahydrate; Acetic acid and polyvinylpyrrolidone aqueous solution with a mass fraction of 1% to 30% are added to the mixed solution of phthalic acid and nickel nitrate hexahydrate to obtain a reaction solution; the reaction solution is reacted at a temperature of 100°C to 180°C for 12h to 72h, Obtain MOF-74Ni;

[0033] The concentration of 2,5-dihydroxyterephthalic acid in the mixed solution of 2,5-dihydroxyterephthalic acid and nickel nitrate hexahydrate described in step 1 is 5mmol / L~30mmol / L;

[0034] The concentration of nickel nitrate hexahydrate in the mixed solution of 2,5-dihydroxyterephthalic acid a...

specific Embodiment approach 2

[0050] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the solvent I described in step 1 is one of acetone, tetrahydrofuran, methanol, N,N-dimethylacetamide, absolute ethanol and water or a mixture of several of them. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0051]Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the solvent I described in step 1 is acetone, N,N-dimethylacetamide and absolute ethanol at a ratio of 1:1: The mixed solution mixed with a volume ratio of 1, the mixed solution mixed with water, N,N-dimethylacetamide and absolute ethanol at a volume ratio of 1:2:1 or tetrahydrofuran, N,N-dimethylacetamide and A mixture of absolute ethanol at a volume ratio of 1:2:1. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

A preparation method of monodispersed cobalt and nickel composite MOF-74 relates to a preparation method of MOF. The invention aims to solve the problem that particles of MOF prepared by existing methods are not uniform such that MOF has poor stability when used for catalysis and gas separation. The method comprises the following steps: 1, preparing MOF-74Ni; 2, carrying out aftertreatment on MOF-74Ni; 3, preparing cobalt and nickel composite MOF and obtaining monodispersed cobalt and nickel composite MOF-74. The prepared monodispersed MOF has controllable dimension and the dimension distribution is narrow. Thus, it is convenient to prepare a sample with special purpose. The dimension of the prepared monodispersed MOF is 0.5-20 microns. The method is suitable for preparation of monodispersed cobalt and nickel composite MOF-74.

Description

technical field [0001] The invention relates to a preparation method of MOF. Background technique [0002] In recent years, a metal-organic framework crystal material (MOF) formed by organic ligands and metal ions through a self-assembly process has attracted great attention from catalysis scholars. Its ligands are mainly carboxyl-containing organic anions, or used together with nitrogen-containing heterocyclic organic neutral ligands; metals are mainly transition metals (such as Zn, Cu, Co) and lanthanide metal elements. host. Foreign research groups such as Yaghi, Ferey, Kitagawa, and Kim, and domestic research groups such as Chen Xiaoming, Cheng Peng, Qiu Shilun, and Zhao Dongyuan have conducted in-depth research on the synthesis, characterization, and application of MOFs. Compared with traditional solid catalytic materials (such as oxides, molecular sieves and carbon, etc.), MOF has the following remarkable characteristics: (1) It has a high specific surface area (such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F15/06
CPCC07F15/065
Inventor 徐洪波张群赵九蓬李垚
Owner 黑龙江省工研院资产经营管理有限公司
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