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Method for performing induced synthesis on MOFs (metal-organic frameworks) membrane by implanting homologous metal oxide particles into surface of macroporous carrier by virtue of swabbing process

A macroporous carrier and oxide technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of increasing the preparation of dense and defect-free membranes, and achieve scale-up, good stability, and process simple effect

Active Publication Date: 2015-03-25
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface defects of macroporous supports increase the difficulty of preparing dense and defect-free membranes, so the preparation of MOFs membranes on the surface of macroporous supports is still a difficult and challenging research.

Method used

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  • Method for performing induced synthesis on MOFs (metal-organic frameworks) membrane by implanting homologous metal oxide particles into surface of macroporous carrier by virtue of swabbing process
  • Method for performing induced synthesis on MOFs (metal-organic frameworks) membrane by implanting homologous metal oxide particles into surface of macroporous carrier by virtue of swabbing process
  • Method for performing induced synthesis on MOFs (metal-organic frameworks) membrane by implanting homologous metal oxide particles into surface of macroporous carrier by virtue of swabbing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Preparation of ZIF-8 film by wiping ZnO powder on macroporous alumina ceramic carrier

[0030] The macroporous alumina ceramic tube was sequentially treated with 1mol / L NaOH, 1mol / L HNO 3 And deionized water treatment, calcination at 500 ℃ for later use;

[0031] Load the commercially available 50nm ZnO powder on the surface of the ceramic carrier by wiping with bare hands;

[0032] Place the ceramic tube coated with ZnO layer in 0.5mol / L methanol solution of 2-methylimidazole, and keep at 50°C for 2h to pretreat the ZnO layer;

[0033] Dissolve 0.47g of zinc chloride, 0.41g of 2-methylimidazole, and 0.25g of sodium formate into 70mL of anhydrous methanol, place the pretreated ceramic tube coated with ZnO powder vertically in a 100mL polytetrafluoroethylene kettle, and slowly Pour the film-forming liquid into the kettle. The polytetrafluoroethylene kettle was placed in an oven at 100°C for 5 hours. After natural cooling, the ceramic tube after the long fil...

Embodiment 2

[0035] Example 2 Preparation of ZIF-7 film by wiping ZnO powder on macroporous alumina ceramic carrier

[0036] The macroporous alumina ceramic tube was sequentially treated with 1mol / L NaOH, 1mol / L HNO 3 And deionized water treatment, calcination at 500 ℃ for later use;

[0037] Load the commercially available 50nm ZnO powder on the surface of the ceramic carrier by wiping with bare hands;

[0038] Place the ceramic tube coated with ZnO layer in 0.5mol / L benzimidazole N,N-dimethylformamide solution, and keep at 50°C for 20min to pretreat the ZnO layer;

[0039] Dissolve 1.34g of zinc nitrate and 0.68g of benzimidazole in 70mL of N,N-dimethylformamide, place the pretreated ceramic tube coated with ZnO powder vertically in a 100mL polytetrafluoroethylene kettle, and pour it slowly The film-forming liquid is in the kettle. The polytetrafluoroethylene kettle was placed in an oven at 100°C for 12 hours. After natural cooling, the ceramic tube after the long film was rinsed wit...

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PUM

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Abstract

The invention provides a method for performing induced synthesis on a stable MOFs (metal-organic frameworks) membrane by implanting homologous metal oxide particles into the surface of a macroporous carrier by virtue of a simple swabbing process, belonging to the field of new materials, and relating to a method for preparing the corresponding stable MOFs membrane by swabbing homologous metal oxide powder, introducing a growth crystal seed and a fixed connecting point for synthesizing the MOFs membrane on the surface of the macroporous carrier, and then performing induced growth. The method is characterized by comprising the following steps: introducing the homologous metal oxide powder into the surface of a macroporous plate-type or tubular carrier in advance by using the simple swabbing process, and then performing solvothermal growth to prepare continuous and dense MOFs membranes. The method provided by the invention has the effects and advantages that a universal method for preparing the MOFs membrane by using the macroporous carrier is provided, and the method is simple to operate in a preparation process, is high in repeatability and good in membrane stability, is suitable for amplified large-scale application, and has important industrial application values.

Description

technical field [0001] The invention belongs to the field of new materials, and relates to a method for preparing a continuous metal-organic framework (MOFs) film on the surface of a macroporous carrier, in particular to the use of homologous metal oxide particles to wipe and treat the macroporous carrier, and to use solvothermal growth The preparation of metal-organic framework compound material membranes is a general preparation method for preparing metal-organic framework membranes on macroporous supports. Background technique [0002] Membrane separation technology is a new type of separation technology that has attracted widespread attention. Compared with traditional separation methods such as rectification, absorption, and extraction with high energy consumption, it has the advantages of no phase change, low energy consumption, normal temperature operation, and environmental friendliness. Membrane separation has gradually moved from the laboratory research and develop...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D67/00
Inventor 张雄福孔令寅刘海鸥邱介山
Owner DALIAN UNIV OF TECH
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