A cobalt-nickel bimetallic organic framework carbon dioxide adsorption material and its preparation method and application

An organic framework and carbon dioxide technology, applied in the direction of alkali metal oxides/hydroxides, alkali metal compounds, chemical instruments and methods, etc., can solve the problems of easily blocked pore adsorption capacity, low introduction amount, difficult introduction of amino groups, etc.

Active Publication Date: 2020-10-27
SHAANXI YUTENG IND
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Problems solved by technology

[0004] However, when the above method is adopted, the introduction of amino groups is difficult or the amount of introduction is low; it is easy to block the pores in the framework structure and make CO 2 The adsorption capacity is low, and the bimetallic MOF-74 has excellent adsorption, especially for small molecular gases, but there are still relatively few researches on the monometallic MOF-74, especially in CO 2 Adsorption

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  • A cobalt-nickel bimetallic organic framework carbon dioxide adsorption material and its preparation method and application
  • A cobalt-nickel bimetallic organic framework carbon dioxide adsorption material and its preparation method and application
  • A cobalt-nickel bimetallic organic framework carbon dioxide adsorption material and its preparation method and application

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Effect test

Embodiment 1

[0036] Preparation of cobalt-nickel bimetallic organic frameworks by rapid microwave heating:

[0037] Containing 1.5g of nickel nitrate and cobalt acetate (the mass ratio of nickel nitrate and cobalt acetate is 1:1) metal salt precursor and 50mL of ultrapure water to form a homogeneous solution A;

[0038] 0.5g of 2,5-dihydroxyterephthalic acid was dissolved in a mixed solution of 50mL absolute ethanol and 50mL DMF to obtain solution B.

[0039] Finally, the A and B solutions were ultrasonically oscillated and mixed evenly. The above mixed solution was heated to 140°C for 1 hour in a microwave-ultrasonic-ultrasonic trinity synthesis reactor, and reacted for 1 hour, filtered, washed, dried, and then activated for 4-6 hours at 200-250°C under vacuum conditions to obtain a series of Co-Ni-MOF-74 with abundant micropores and unsaturated coordination bonds.

Embodiment 2

[0058] A preparation method of a cobalt-nickel bimetallic organic framework carbon dioxide adsorption material is as follows: nickel nitrate and cobalt acetate are dissolved in water to form solution A; wherein the mass ratio of nickel nitrate and cobalt acetate in solution A is 1:1.

[0059] Dissolving 2,5-dihydroxyterephthalic acid in a solution containing ethanol and N,N-dimethylformamide to form solution B;

[0060] Mix solution A and solution B evenly to obtain a mixed solution, then heat the mixed solution to 110°C for 60 minutes in a microwave ultraviolet ultrasonic trinity synthesis reactor, filter, wash and dry, and then activate at 200°C under vacuum Treat for 6 hours to obtain a bimetallic organic framework carbon dioxide adsorption material;

[0061] Among them, the volume ratio of water, ethanol and N,N-dimethylformamide is 1:0.5:5; the mass ratio of the total mass of nickel nitrate and cobalt acetate to 2,5-dihydroxyterephthalic acid is 3:1 ; The total mass frac...

Embodiment 3

[0063] A preparation method of a cobalt-nickel bimetallic organic framework carbon dioxide adsorption material is as follows: nickel nitrate and cobalt acetate are dissolved in water to form solution A; wherein, the mass ratio of nickel nitrate and cobalt acetate in solution A is 1:6.

[0064] Dissolving 2,5-dihydroxyterephthalic acid in a solution containing ethanol and N,N-dimethylformamide to form solution B;

[0065] Mix solution A and solution B evenly to obtain a mixed solution, then heat the mixed solution to 120°C for 40 minutes in a microwave ultraviolet ultrasonic trinity synthesis reactor, filter, wash and dry, and then activate at 250°C under vacuum Treat for 4 hours to obtain a bimetallic organic framework carbon dioxide adsorption material;

[0066] Among them, the volume ratio of water, ethanol and N,N-dimethylformamide is 1:3:3; the mass ratio of the total mass of nickel nitrate and cobalt acetate to 2,5-dihydroxyterephthalic acid is 4:1 ; The total mass fract...

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Abstract

The invention discloses a cobalt-nickel double-metal organic framework carbon dioxide adsorption material as well as a preparation method and application thereof. The preparation method comprises thefollowing steps: dissolving a nickel salt and a cobalt salt into water so as to obtain a solution A; dissolving 2,5-dyhydroxy terephthalic acid into a solution with ethanol and N,N-dimethyl formamideso as to obtain a solution B; and uniformly mixing the solution A with the solution B so as to obtain a mixed solution, and performing a heating reaction on the mixed solution in a microwave-ultraviolet-ultrasonic wave three-into-one synthesis reaction instrument, and performing activation treatment under a vacuum condition, so as to obtain the double-metal organic framework carbon dioxide adsorption material. The material has the a uniform, regular and dispersed microtopography, a large specific surface area, a large micropore capacity and a very large CO2 adsorption capacity, and in addition, is simple in preparation process, mild in adsorption condition, large in adsorption capacity, good in selectivity and possible in repeated use.

Description

technical field [0001] The present invention relates to a CO 2 The invention relates to an adsorption material, in particular to a cobalt-nickel bimetallic organic framework carbon dioxide adsorption material and a preparation method and application thereof. Background technique [0002] CO 2 As one of the important members of greenhouse gases, it mainly comes from the burning of fossil fuels. In recent years, the continuous rise of CO 2 Concentrations have caused a series of climate and environmental problems such as: global warming, melting glaciers, rising sea levels, pests and diseases, etc. CO 2 Capture and storage technology (CCS) is seen as reducing atmospheric CO 2 One of the effective ways of concentration has attracted the attention of researchers. Several existing technologies have been applied to CO emissions from fossil fuel combustion 2 The capture, including physical adsorption, chemical absorption and membrane separation. Among them, the cost of membr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01J20/226B01J20/28054B01J20/28066Y02C20/40
Inventor 何炽陈长伟马牧笛程雁
Owner SHAANXI YUTENG IND
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