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A method for controlling the morphology of zeolite imidazolate framework material zif-8

A technology of zeolite imidazolate and ZIF-8, applied in the field of zeolite imidazolate framework materials, can solve the problems of a large number of organic solvents, time-consuming and the like, and achieve the effects of simple method, short time-consuming and mild conditions

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing template method generally requires a large amount of organic solvents and takes a long time

Method used

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  • A method for controlling the morphology of zeolite imidazolate framework material zif-8
  • A method for controlling the morphology of zeolite imidazolate framework material zif-8
  • A method for controlling the morphology of zeolite imidazolate framework material zif-8

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of ZIF-8 solid sphere comprises the following steps:

[0032] (1) Zn(NO 3 ) 2 ·6H 2 O (1.05g), 2-methylimidazole (1.16g), tetrabutylammonium bromide (3.01g) and PVP (0.02g) were mixed, stirred and reacted at 60°C for 60min to obtain a homogeneous solution;

[0033] (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;

[0034] (3) Centrifuge the suspension, wash with water and ethanol, and dry at 110° C. for 12 hours to obtain ZIF-8 solid spheres.

[0035] The X-ray diffraction pattern of the zeolite-like imidazolate framework material (ZIF-8 solid sphere) prepared in embodiment 1 is as follows figure 1 As shown, the scanning electron microscope image is shown in figure 2 As shown, the transmission electron microscope image is shown in image 3 shown. The performance test results of the ZIF-8 solid spheres prepared in Exam...

Embodiment 2

[0037] The preparation method of ZIF-8 hollow sphere comprises the following steps:

[0038] (1) Zn(NO 3 ) 2 ·6H 2 O (1.06g), 2-methylimidazole (1.18g), tetrabutylammonium bromide (3.03g) and P123 (0.10g) were mixed, stirred and reacted at 60°C for 60min to obtain a homogeneous solution;

[0039] (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;

[0040] (3) The suspension was centrifuged, washed with water and ethanol, and dried at 110° C. for 12 hours to obtain ZIF-8 hollow spheres.

[0041] The X-ray diffraction pattern of the zeolite-like imidazolate framework material (ZIF-8 hollow sphere) prepared in embodiment 2 is as follows figure 1 As shown, the scanning electron microscope image is shown in figure 2 As shown, the transmission electron microscope image is shown in image 3 shown. The performance test results of the ZIF-8 hollow spheres pr...

Embodiment 3

[0043] The preparation method of hierarchical hole ZIF-8, comprises the following steps:

[0044] (1) Zn(NO 3 ) 2 ·6H 2O (1.03g), 2-methylimidazole (1.15g), tetrabutylammonium bromide (3.02g) and SDS (0.02g) were mixed, stirred and reacted at 60°C for 60min to obtain a homogeneous solution;

[0045] (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;

[0046] (3) Centrifuge the suspension, wash with water and ethanol, and dry at 110° C. for 12 hours to obtain hierarchically porous ZIF-8.

[0047] The X-ray diffraction pattern of the zeolite imidazolate framework material (hierarchical hole ZIF-8) prepared in embodiment 3 is as follows figure 1 As shown, the scanning electron microscope image is shown in figure 2 As shown, the transmission electron microscope image is shown in image 3 shown. The performance test results of the hierarchically porous Z...

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Abstract

The invention belongs to the technical field of zeolite-like imidazolate framework materials, and discloses a method for controlling the morphology of zeolite-like imidazolate framework material ZIF-8. The method includes the following steps: 1) mixing zinc nitrate hexahydrate, 2-methylimidazole, tetrabutylammonium bromide and a surfactant, and performing heating reaction to obtain a homogeneous solution; and 2) mixing the homogeneous solution and water to obtain a turbid liquid; and then performing centrifugation, washing and drying so that a zeolite-like imidazolate framework material can beobtained, wherein the surfactant is at least one among a poly(ethylene oxide)-polypropylene oxide-poly(ethylene oxide) triblock copolymer, polyvinylpyrrolidone K30, sodium dodecyl sulfate and hexadecyl trimethyl ammonium bromide, and the morphology of the material is different when the surfactant is different. The method is simple, mild and fast in condition, low in comprehensive cost and pollution-free to environment; and the method can synthetize the material with different morphologies by selecting different surfactants, such as hollow balls, solid balls, multistage porous particles and stacked particles.

Description

technical field [0001] The invention belongs to the technical field of zeolite imidazolate framework materials, and relates to a preparation method of zeolite imidazolate framework materials, in particular to a method for controlling the morphology of zeolite imidazolate framework material ZIF-8. The method can prepare ZIF-8 hollow spheres, ZIF-8 solid spheres, ZIF-8 hierarchical porous particles and ZIF-8 stacked particles. Background technique [0002] As a kind of crystalline microporous materials, zeolitic imidazolate frameworks (ZIFs) have been widely used in catalysis, gas adsorption and separation. ZIF-8 is the most representative ZIFs material, which has the characteristics of special topological structure, excellent thermal and chemical stability, high specific surface area, abundant active sites, and adjustable pore structure. It has broad application prospects in the fields of adsorption and adsorption. The construction of ZIF-8 materials with special morphologi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 陈砺胡丽华严宗诚磨晓虹
Owner SOUTH CHINA UNIV OF TECH
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