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A method for efficiently preparing zif-8 materials

A ZIF-8, high-efficiency technology, applied in the field of efficient preparation of ZIF-8 materials, can solve the problems of increasing the preparation cost, increasing the complexity of the preparation process, and the cumbersome experimental operation, so as to achieve improved separation performance, controllable morphology, and improved The effect of preparation efficiency

Active Publication Date: 2020-10-09
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the preparation process of ZIF-8 can be optimized to a certain extent by changing the solvent type, adding template agent or surfactant, and controlling the reaction temperature, and improving the preparation efficiency of ZIF-8, this also inevitably increases the preparation process. Complexity and cumbersome experimental operations, while the use of organic solvents or templates will also increase the cost of preparation

Method used

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  • A method for efficiently preparing zif-8 materials
  • A method for efficiently preparing zif-8 materials
  • A method for efficiently preparing zif-8 materials

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Stir and mix zinc acetate, 2-methylimidazole, and distilled water at a molar ratio of 1:25:833 at room temperature to obtain a milky white solution;

[0030] (2) Add 1,8-diazabicyclo[5.4.0]undec-7-ene with a molar ratio of 2:25 to 2-methylimidazole in the milky white solution prepared in step (1), at room temperature Stir and mix evenly to obtain a milky white suspension;

[0031] (3) Transfer the milky white suspension prepared in step (2) to a polytetrafluoroethylene-lined hydrothermal synthesis reaction kettle, and then place the reaction kettle in an oven for hydrothermal reaction at 120°C for 0.5h , after the hydrothermal reaction, the reaction solution was left to cool and centrifuged to obtain a white solid, which was washed alternately with ethanol and distilled water 6 times each, and washed with distilled water for the last time, and then vacuum-dried at 100°C for 2 hours to obtain a white powder Solid, namely ZIF-8.

[0032] Depend on figure 2 It can ...

Embodiment 2

[0041] (1) Stir and mix zinc acetate, 2-methylimidazole, and distilled water at a molar ratio of 1:25:1111 at room temperature to obtain a milky white solution;

[0042] (2) Add 1,8-diazabicyclo[5.4.0]undec-7-ene with a molar ratio of 1:25 to 2-methylimidazole in the milky white solution prepared in step (1), at room temperature Stir and mix evenly to obtain a milky white suspension;

[0043] (3) Transfer the milky white suspension prepared in step (2) to a polytetrafluoroethylene-lined hydrothermal synthesis reaction kettle, and then place the reaction kettle in an oven for hydrothermal reaction at 120°C for 0.5h After the hydrothermal reaction, the reaction liquid was left to cool and centrifuged to obtain a white solid, which was washed alternately with ethanol and distilled water for 5 times each, and washed with distilled water for the last time, and then vacuum-dried at 90°C for 3 hours to obtain a white powder Solid, namely ZIF-8.

[0044] Depend on Figure 7 It can ...

Embodiment 3

[0047] (1) Stir and mix zinc acetate, 2-methylimidazole, and distilled water at a molar ratio of 1:25:500 at room temperature to obtain a milky white solution;

[0048] (2) Add 1,8-diazabicyclo[5.4.0]undec-7-ene with a molar ratio of 3:25 to 2-methylimidazole in the milky white solution prepared in step (1), at room temperature Stir and mix evenly to obtain a milky white suspension;

[0049] (3) Transfer the milky white suspension prepared in step (2) to a polytetrafluoroethylene-lined hydrothermal synthesis reaction kettle, and then place the reaction kettle in an oven for hydrothermal reaction at 120°C for 0.5h , after the hydrothermal reaction, the reaction solution was left to cool and centrifuged to obtain a white solid, which was washed alternately with ethanol and distilled water 6 times each, and washed with distilled water for the last time, and then vacuum-dried at 100°C for 2 hours to obtain a white powder Solid, namely ZIF-8.

[0050] Depend on Figure 8 It can ...

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Abstract

The invention discloses a method for efficiently preparing ZIF-8 materials, which comprises the following steps: (1) stirring and mixing zinc acetate or zinc nitrate, 2-methylimidazole, and distilled water in a molar ratio of 1:25:500-1200, Obtain milky white solution; (2) add 1,8-diazabicyclo[5.4.0]undec-7-ene or 1,5 ‑diazabicyclo[4.3.0]non‑5‑ene, stir and mix evenly to obtain a milky white suspension; (3) transfer the milky white suspension to a hydrothermal synthesis reactor, and then place it in an oven at 120°C The hydrothermal reaction was carried out for 0.5h, and after the reaction, it was left to cool, centrifuged, washed, and dried to obtain a white powdery solid, which was ZIF‑8. The invention has the advantages of uniform size and controllable shape of the ZIF-8 material, and simple and efficient preparation.

Description

technical field [0001] The invention relates to the technical field of preparation of zeolite imidazolate framework materials, in particular to a method for efficiently preparing ZIF-8 materials. Background technique [0002] ZIF-8 is composed of Zn 2+ A topologically porous material composed of zeolite and imidazolyl ligands is a typical representative of zeolite imidazolate metal-organic frameworks (ZIFs). The framework structure of ZIF-8 is composed of Zn 2+ ZnN formed by linking with the N atom in the imidazolyl ligand 4 Composed of tetrahedral structural units, it has permanent porosity, high surface area, hydrophobicity, open metal sites, and excellent water and thermal stability. ZIF-8 material has shown good application prospects in the fields of gas adsorption and storage, drug loading and transportation, heterogeneous catalysis, and pollution adsorption. It can also be used as a precursor for the preparation of nano-ZnO, which has aroused strong interest of rese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 许映杰陈婷婷
Owner SHAOXING UNIVERSITY
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