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Flexible metal organic frame material and preparation method and application thereof

A technology of organic frameworks and flexible metals, applied in the field of flexible metal organic framework materials and their preparation, can solve the problems of complex synthesis steps, unstable structure of flexible metal organic framework materials, low CO2 adsorption selectivity, etc., and achieve simple preparation process, Enhanced flexibility and improved CO2 adsorption capacity

Inactive Publication Date: 2018-06-29
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been reported that the ability to absorb CO 2 Flexible metal-organic framework materials are faced with structural instability, complex synthesis steps, and the 2 The problem of low adsorption selectivity

Method used

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  • Flexible metal organic frame material and preparation method and application thereof
  • Flexible metal organic frame material and preparation method and application thereof
  • Flexible metal organic frame material and preparation method and application thereof

Examples

Experimental program
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Effect test

specific Embodiment 1

[0036] A method for preparing a flexible metal-organic framework material, comprising:

[0037] (1) 130 molar parts of N,N-dimethylformamide, 340 molar parts of ethanol, and 2200 molar parts of water are mixed to form a mixed solution, and 6 molar parts of fluoroboric acid are added to the mixed solution to form a mixed solvent;

[0038] (2) 1 molar part of cobalt nitrate hexahydrate, 1 molar part of 4,4'-bipyridyl, 0.8 molar part of 4-(1H-tetrazol-5-yl) benzoic acid obtained in step (1) In the mixed solvent, stir for 25 minutes to form a mixture;

[0039] (3) Place the mixture obtained in step (2) in a high-pressure reactor, heat it to 115°C in a closed manner and keep it for 72 hours, and then cool it to room temperature at a rate of 0.1°C per minute to obtain a reaction solution;

[0040] (4) Filtrating the reaction solution obtained in step (3) to obtain a filter body, and washing the filter body with ethanol to obtain pink rod-shaped crystals, that is, to obtain the init...

specific Embodiment 2

[0055] Flexible metal-organic framework materials, whose chemical formula is [Co 3 (tzba) 2 (bpy) 3 (F) 2 ]·DMF·C 2 h 5 OH·2H 2 O, where:

[0056] tzba is a negative dianion ligand of 4-(1H-tetrazol-5-yl)benzoic acid;

[0057] bpy is 4,4'-bipyridine, DMF is N,N-dimethylformamide; where:

[0058] The structural formulas of tzba and bpy are as follows:

[0059]

[0060] The flexible metal organic framework material contains cobalt-tetrazolium-fluorine trinuclear cluster building units, and forms a layered structure through the coordination extension of tzba, and the adjacent layers are connected by bpy to form a double interspersed three-dimensional framework.

[0061] A method for preparing a flexible metal-organic framework material, comprising:

[0062] (1) 120 molar parts of N,N-dimethylformamide, 320 molar parts of ethanol, and 2110 molar parts of water are mixed to form a mixed solution, and 5 molar parts of fluoroboric acid are added to the mixed solution to f...

specific Embodiment 3

[0069] Flexible metal-organic framework materials, whose chemical formula is [Co 3 (tzba) 2 (bpy) 3 (F) 2 ]·DMF·C 2 h 5 OH·2H 2 O, where:

[0070] tzba is a negative dianion ligand of 4-(1H-tetrazol-5-yl)benzoic acid;

[0071] bpy is 4,4'-bipyridine, DMF is N,N-dimethylformamide; where:

[0072] The structural formulas of tzba and bpy are as follows:

[0073]

[0074] The flexible metal organic framework material contains cobalt-tetrazolium-fluorine trinuclear cluster building units, and forms a layered structure through the coordination extension of tzba, and the adjacent layers are connected by bpy to form a double interspersed three-dimensional framework.

[0075] A method for preparing a flexible metal-organic framework material, comprising:

[0076] (1) 140 molar parts of N,N-dimethylformamide, 360 molar parts of ethanol, and 2330 molar parts of water are mixed to form a mixed solution, and 7 molar parts of fluoroboric acid are added to the mixed solution to f...

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Abstract

The invention discloses a preparation method for a flexible metal organic frame material. The method comprises the following steps: (1) mixing N,N-dimethylformamide, ethyl alcohol, and water to form mixed liquid, and adding fluoroboric acid to form a mixed solvent; (2) adding cobalt-nitrate hexahydrate, 4,4'-dipyridyl, and 4-(1H-tetrazole-5-yl) benzoic acid to the mixed solvent, and stirring to form a mixture; (3) placing the mixture in a high-pressure reaction kettle, heating in a closed space, cooling to the room temperature, to obtain reaction liquid; (4) filtering the reaction liquid to obtain a filtrated body, and washing the filtrated body by using the ethyl alcohol, to obtain a pink rodlike crystal; and (5) activating the pink rodlike crystal, to obtain the flexible metal organic frame material. The flexible metal organic frame material is used for adsorbing and separating CO2 and CH4. The disclosed flexible metal organic frame material and the preparation method and the application thereof have the advantages of the simple and convenient preparation technology, the moderate reaction conditions, the easily obtained raw materials, and the good adsorptive selectivity and so on.

Description

technical field [0001] The invention belongs to the field of inorganic material chemistry, and in particular relates to a flexible metal organic framework material and its preparation method and application. Background technique [0002] In recent years, the rapid development of industry has led to atmospheric CO 2 The content of is getting higher and higher, and brings serious greenhouse effect, so selective separation and capture of CO 2 become the focus of attention in many technical fields. [0003] Natural gas and landfill gas are important industrial and domestic fossil energy sources. Besides the active ingredient CH 4 In addition, it also contains about 5%-10% CO 2 , their presence will reduce the efficiency of the fuel, so by removing CO 2 It is of great practical significance to achieve the purpose of fuel purification. [0004] The current separation captures CO 2 The methods mainly include organic amine absorption method and activated carbon material adsorp...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22B01D53/02
CPCB01D53/02B01D2257/504B01D2257/7025B01J20/226C08G83/008Y02C20/20Y02C20/40Y02P20/151
Inventor 侯磊杨红云李泳志刘洋刘歌王尧宇
Owner NORTHWEST UNIV
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