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Zeolite-like imidazate framework material and preparation method thereof

A technology of zeolite imidazolate and framework materials, applied in chemical instruments and methods, 2/12 group organic compounds without C-metal bonds, zinc organic compounds, etc., can solve the problems of by-products and amorphous crystals, and achieve The effect of high crystallinity, low overall cost, and large specific surface area

Inactive Publication Date: 2017-11-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are by-products and amorphous crystals in the ZIFs synthesized by this method

Method used

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  • Zeolite-like imidazate framework material and preparation method thereof
  • Zeolite-like imidazate framework material and preparation method thereof
  • Zeolite-like imidazate framework material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method for a zeolite-like imidazolate framework material, comprising the following steps:

[0027] (1) Metal salt Zn(NO 3 ) 2 ·6H 2 O (1.49g, 5.01mmol), imidazole derivative 2-methylimidazole (2.47g, 29.96mmol) and quaternary ammonium salt Eu 4 NBr (6.44g, 19.98mmol) was mixed, stirred and reacted for 30min at 60°C to obtain a homogeneous solution; Zn(NO 3 ) 2 ·6H 2 O: 2-methylimidazole: Eu 4 NBr molar ratio = 1:6:4;

[0028] (2) After the homogeneous solution is cooled to room temperature, add deionized water (the amount is 5 times the volume of the homogeneous solution) to obtain a suspension;

[0029] (3) Centrifuge the suspension, wash with water and ethanol, and dry at 110° C. for 12 hours to obtain the zeolite-like imidazolate framework material. The performance test results of the zeolite-like imidazolate framework material prepared in this example are shown in Table 1.

[0030] The X-ray diffraction spectrum of the zeolite imidazolate fram...

Embodiment 2

[0032] A preparation method for a zeolite-like imidazolate framework material, comprising the following steps:

[0033] (1) Metal salt Zn(OAc) 2 2H 2 O (0.63g, 2.89mmol), imidazole derivative 2-methylimidazole (0.95g, 11.57mmol) and quaternary ammonium salt ChCl (1.07g, 7.69mmol) were mixed, stirred and reacted at 60°C for 30min to obtain a homogeneous solution ; Zn(OAc) 2 2H 2 O: 2-methylimidazole: ChCl molar ratio = 1: 4: (8 / 3);

[0034] (2) After the homogeneous solution is cooled to room temperature, add deionized water (the amount is 5 times the volume of the homogeneous solution) to obtain a suspension;

[0035] (3) Centrifuge the suspension, wash with water and ethanol, and dry at 110° C. for 12 hours to obtain the zeolite-like imidazolate framework material. The performance test results of the zeolite-like imidazolate framework material prepared in this example are shown in Table 1.

[0036] The X-ray diffraction pattern of the zeolite-like imidazolate framework ...

Embodiment 3

[0038] A preparation method for a zeolite-like imidazolate framework material, comprising the following steps:

[0039] (1) Metal salt Zn(NO 3 ) 2 ·6H 2 O (3.33g, 11.19mmol), imidazole derivative 2-ethylimidazole (2.15g, 22.41mmol) and quaternary ammonium salt Eu 4 NBr (4.81g, 14.92mmol) was mixed, stirred and reacted at 60°C for 30min to obtain a homogeneous solution; Zn(NO 3 ) 2 ·6H 2 O: 2-ethylimidazole: Eu 4 NBr molar ratio=1:2:(4 / 3);

[0040] (2) After the homogeneous solution is cooled to room temperature, add deionized water (the amount is 5 times the volume of the homogeneous solution) to obtain a suspension;

[0041] (3) Centrifuge the suspension, wash with water and ethanol, and dry at 110° C. for 12 hours to obtain the zeolite-like imidazolate framework material. The performance test results of the zeolite-like imidazolate framework material prepared in this example are shown in Table 1. The X-ray diffraction pattern of the zeolite-like imidazolate framewor...

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Abstract

The invention belongs to the technical field of metal organic framework materials, and discloses a zeolite-like imidazolate framework material and a preparation method thereof. The method is as follows: (1) mixing metal salts, imidazole derivatives and quaternary ammonium salts, heating and reacting to obtain a homogeneous solution; (2) adding water to the homogeneous solution after cooling to obtain a suspension; (3) The suspension is centrifuged, washed and dried to obtain the zeolite-like imidazolate skeleton material. The method of the invention has the advantages of simple operation, mild conditions, fast speed, no need of solvent, relatively low overall cost and no environmental pollution. The prepared zeolite-like imidazolate framework material has the characteristics of high crystallinity, large specific surface area, good thermal stability, etc., and has good application prospects.

Description

technical field [0001] The invention relates to a zeolite-like imidazolate framework material and a preparation method thereof, in particular to a ZIFs nano crystal material and a preparation method thereof. Background technique [0002] Zeolitic imidazolate frameworks (ZIFs) are a class of MOFs materials with a zeolite framework structure, which are coordinated by transition metal ions Zn or Co and imidazole organic compounds, and have the advantages of both zeolites and MOFs: specific surface area Large, high crystallinity, high thermal and chemical stability. Therefore, ZIFs have a wide range of applications in catalysis, gas adsorption, and separation. [0003] ZIF-8(Zn(MIm) 2 ,MIm=2-methylimidazole) as the most representative class of materials in ZIFs has been extensively studied. At present, the methods for synthesizing ZIF-8 are mainly solvothermal synthesis and rapid synthesis in water. ZIF-8 synthesized with methanol as a solvent has a high specific surface are...

Claims

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Application Information

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IPC IPC(8): C07F3/06C07F15/06
CPCC07F3/003C07F15/065
Inventor 严宗诚胡丽华陈砺
Owner SOUTH CHINA UNIV OF TECH
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