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Method for rapidly preparing green MOFs (Metal-organic frameworks) porous microspheres

A porous microsphere, green technology, applied in the field of nanomaterials, can solve the problems of complex preparation process, single function, long time consumption, etc., and achieve the effect of less energy consumption, improved electrical conductivity, and excellent electrical conductivity.

Inactive Publication Date: 2018-11-23
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for quickly preparing green MOFs porous microspheres that is easy to operate and solve the problems of complex preparation procedures, long time-consuming, and single functions

Method used

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  • Method for rapidly preparing green MOFs (Metal-organic frameworks) porous microspheres
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  • Method for rapidly preparing green MOFs (Metal-organic frameworks) porous microspheres

Examples

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Embodiment 1

[0046] This example shows a method for the rapid preparation of green MOFs porous microspheres according to the following steps:

[0047] 1.6g PAN was added to 18.2g dimethylformamide solvent, and then 0.1g ZIF-67 was added, and the mixed solution was stirred at room temperature for 24h. Take 10ml of the homogeneous mixed solution, add 0.5g of polyaniline, stir at room temperature for 6 hours, and ultrasonically shake the mixed solution for 30 minutes before electrospinning. The electrospinning voltage was 20 kV, the flow rate was 1.5 ml / h, and the distance between the needle and the collection plate was 10 cm.

Embodiment 2

[0049] This case study demonstrates a method for quickly preparing green MOFs porous microspheres as follows:

[0050] 1.6g PAN was added to 18.2g dimethylformamide solvent, then 0.2g ZIF-67 was added, and the mixed solution was stirred at room temperature for 24 hours. Take 10ml of uniform mixed solution, add 0.5g of polyaniline, stir at room temperature for 6h, before electrospinning, the mixed solution is ultrasonically shaken for 30min. The electrospinning voltage is 20kV, the flow rate is 1.5ml / h, and the distance between the needle and the collecting plate is 10cm.

[0051] Please refer to the performance of the green MOFs porous microspheres obtained in this example Figure 2 to Figure 3 ,Such as figure 2 As shown, the porous microspheres formed by ZIF-67 nanoparticles with cubic crystal form are uniformly distributed on polyacrylonitrile and polyaniline fibers. Such as image 3 As shown, the diameter of the formed porous microspheres is between 1-3 μm.

Embodiment 3

[0053] This case study demonstrates a method for quickly preparing green MOFs porous microspheres as follows:

[0054] 1.6g PAN was added to 18.2g dimethylformamide solvent, and then 0.3g ZIF-67 was added, and the mixed solution was stirred at room temperature for 24h. Take 10 ml of the homogeneous mixed solution, add 0.5 g of polyaniline, stir at room temperature for 6 hours, and ultrasonically shake the mixed solution for 30 minutes before electrospinning. The electrospinning voltage is 20kV, the flow rate is 1.5ml / h, and the distance between the needle and the collecting plate is 10cm.

[0055] Please refer to the performance of the green MOFs porous microspheres obtained in this example Figure 4 to Figure 5 ,Such as Figure 4 As shown, ZIF-67 porous microspheres are evenly distributed on polyacrylonitrile and polyaniline fibers. Such as Figure 5 As shown, the diameter of the formed porous microspheres can reach 3-5 μm.

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Abstract

The invention discloses a method for rapidly preparing green MOFs (Metal-organic frameworks) porous microspheres. The method comprises the steps: adding a first polymer to a solvent, and stirring andmixing at room temperature to obtain a mixed solution I; adding MOFs to the mixed solution I, and then stirring and mixing at room temperature to obtain a mixed solution II; ultrasonically oscillatingthe mixed solution II uniformly, and then obtaining the green MOFs porous microspheres by electrospinning treatment. The method disclosed by the invention has the advantages that the preparation process is simple, safe and controllable, less time and energy are consumed, and the cubic crystal type MOFs are converted into the MOFs porous microspheres by electrospinning. Most importantly, in the process of preparing the MOFs porous microspheres, no contaminating heavy metals or toxic substances are used, and no pollution is caused.

Description

Technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a method for rapidly preparing green MOFs porous microspheres. Background technique [0002] Porous compound metal-organic frameworks (MOFs) have been widely used in the research of gas separation, storage, catalysis, and drug delivery in recent years due to the designability, adjustability and superior adsorption performance of their microporous structure. The macroscopic assembly material with MOFs porous microspheres as the combined component has high specific area and high adsorption performance. After removing the solvent molecules, the porous microspheres can also provide more open metal sites, while the compound framework maintains high stability , And therefore gradually got a lot of attention. The existing methods for preparing porous MOFs generally include spray method, template method, additive cross-linking method and so on. These methods generally require multiple...

Claims

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Application Information

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IPC IPC(8): B01J13/06
CPCB01J13/06
Inventor 赖跃坤郭琦黄剑莹赵燕
Owner SUZHOU UNIV
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