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Acid modified metal-organic framework material and preparation method thereof

A technology of metal-organic framework and acid modification, applied in chemical instruments and methods, fuel cells, climate sustainability, etc., can solve the problems of limiting the application of fuel cell electrolytes, low proton conductivity, poor chemical stability, etc., to achieve Excellent proton conductivity, improved proton conductivity, and low production cost

Inactive Publication Date: 2019-01-11
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the poor chemical stability of most MOFs limits their application as fuel cell electrolytes
Among all metal-organic framework materials, M-MOF-74 has attracted everyone's attention because of its excellent water resistance and stable acid resistance, but the proton conductivity of M-MOF-74 itself is not high, so it needs to be investigated. Modification can be applied to electrolyte materials

Method used

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  • Acid modified metal-organic framework material and preparation method thereof
  • Acid modified metal-organic framework material and preparation method thereof
  • Acid modified metal-organic framework material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]A kind of acid-modified metal-organic framework material H + The preparation method of @Ni-MOF-74, the steps are as follows:

[0044] 1) Mix 20mL N,N-dimethylformamide, 1mL absolute ethanol and 1mL deionized water, and divide them into A solution and B solution;

[0045] 2) Add 0.778g of nickel acetate to solution A, and sonicate for 15 minutes to obtain solution C;

[0046] 3) Add 0.198g of 2,5-dihydroxyterephthalic acid to solution B, and ultrasonicate for 15 minutes to obtain solution D;

[0047] 4) Under magnetic stirring, add solution C to solution D dropwise to produce a light green precipitate, stir for 15 minutes, centrifuge at 8000r / min for 15 minutes, and collect solid matter;

[0048] 5) washing the solid matter with methanol for 4 times, each time for 12 hours, and vacuum drying at 60° C. for 6 hours to obtain the metal organic framework material Ni-MOF-74;

[0049] 6) Add the metal-organic framework Ni-MOF-74 obtained in step 5) into 20 mL of sulfuric aci...

Embodiment 2

[0061] A kind of acid-modified metal-organic framework material H + The preparation method of @Zn-MOF-74, the steps are as follows:

[0062] 1) Mix 20mL N,N-dimethylformamide and 1mL absolute ethanol, and divide into A solution and B solution equally;

[0063] 2) Add 0.686g of zinc acetate to solution A, and ultrasonicate for 10 minutes to obtain solution C;

[0064] 3) Add 0.198g of 2,5-dihydroxyterephthalic acid to solution B, and ultrasonicate for 10 minutes to obtain solution D;

[0065] 4) Under magnetic stirring, add solution C to solution D dropwise to produce a yellow precipitate, stir for 15 minutes, centrifuge at 7000r / min for 10 minutes, and collect solid matter;

[0066] 5) washing the solid matter with methanol for 4 times, each time for 8 hours, and vacuum drying at 50° C. for 6 hours to obtain the metal organic framework material Zn-MOF-74;

[0067] 6) Add the metal-organic framework material Zn-MOF-74 obtained in step 5) into 15 mL of phosphoric acid solutio...

Embodiment 3

[0078] A kind of acid-modified metal-organic framework material H + The preparation method of @Co-MOF-74, the steps are as follows:

[0079] 1) Mix 20mL N,N-dimethylformamide and 1mL absolute ethanol, and divide into A solution and B solution equally;

[0080] 2) Add 0.778g of cobalt acetate to solution A, and sonicate for 15 minutes to obtain solution C;

[0081] 3) Add 0.198g of 2,5-dihydroxyterephthalic acid to solution B, and ultrasonicate for 15 minutes to obtain solution D;

[0082] 4) Under magnetic stirring, add solution C to solution D dropwise to produce light yellow precipitate, stir for 10 minutes, and centrifuge at 8000r / min for 10 minutes to collect solid matter;

[0083] 5) washing the solid material with methanol for 6 times, each time for 12 hours, and drying in vacuum at 50° C. for 6 hours to obtain the metal organic framework material Co-MOF-74;

[0084] 6) Add the metal-organic framework material Co-MOF-74 obtained in step 5) into 20 mL of sulfuric acid ...

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Abstract

The invention discloses an acid modified metal-organic framework material. The material is obtained by modifying a metal-organic framework material M-MOF-74 with an acidic solution, wherein M is Ni, Zn or Co, and the acidic solution is one or more of sulfuric acid, phosphoric acid and hydrochloric acid. The preparation method comprises the following steps: reacting transition metal acetate with 2,5-dihydroxyterephthalic acid to form the metal-organic framework material M-MOF-74, and adding the metal-organic framework material M-MOF-74 to the acidic solution in order to carry out acid modification in order to obtain the acid modified metal-organic framework material H<+>@M-MOF-74. The proton conductivity of the acid-modified metal-organic framework material H<+>@M-MOF-74 prepared by the method is 50-150 times higher than that of an unmodified material; and the preparation method has the advantages of low production cost, high preparation efficiency, simplicity in operation, and easinessin achieving industrialization, and is expected to become an ideal fuel cell electrolyte material.

Description

technical field [0001] The invention belongs to the field of application of proton-conducting materials in fuel cells as electrolytes, and in particular relates to an acid-modified metal-organic framework material and a preparation method thereof. Background technique [0002] In recent years, due to the rapid development of social economy, people's demand for energy is also increasing day by day, and the extensive use of fossil fuels has led to increasing environmental pollution problems. Therefore, the use of green and environmentally friendly energy has been paid more and more attention by people, and several alternative energy technologies have been proposed, such as solar technology, wind hydropower, hydrogen energy, fuel cells, etc., among which fuel cells have attracted considerable attention . [0003] Proton-conducting materials are used as electrolytes in fuel cells, and their proton-conducting performance is a key factor restricting the use of fuel cells. Repres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30H01M8/1016
CPCB01J20/226H01M8/1016B01J20/30Y02P70/50Y02E60/50
Inventor 范东华程惠周艺轩黄吉儿代福徐维谢卓鸿付兴杰
Owner WUYI UNIV
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