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Method for super-rapidly preparing metal-organic framework films through using external electric field method

A metal-organic framework and applied electric field technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as limiting the application of metal-organic framework materials, and achieve large-scale industrial production and simplify the operation process , The effect of reducing maintenance costs

Pending Publication Date: 2017-11-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These problems have greatly limited the application of metal organic framework materials in practical industry.

Method used

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  • Method for super-rapidly preparing metal-organic framework films through using external electric field method
  • Method for super-rapidly preparing metal-organic framework films through using external electric field method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] With Zn(NO 3 ) 2 ·6H 2 O is a ZIF-8 film prepared by metal salt on anodized alumina, using Zn(NO 3 ) 2 ·6H 2 O provides zinc salts, and ZIF-8 films are fabricated ultra-fast on anodized aluminum by an applied electric field method, which specifically includes the following steps:

[0032] (1) The commercial anodized aluminum substrate was rinsed with ethanol for 2 minutes to remove surface stains;

[0033] (2) Prepare the solution required for ZIF-8 film growth: weigh out zinc nitrate hexahydrate (Zn(NO) 3 ) 2 ·6H 2 O) Dissolve 0.29 g of particles in 100 mL of methanol, then add 0.164 g of 2-methylimidazole (C 4 H 6 N 2 ) particles, sonicated at room temperature for 2 minutes to obtain a colorless transparent clear solution;

[0034] (3) Immerse the anodic alumina substrate cleaned in step (1) into the clear solution obtained in step (2); apply a voltage of 20V and react at 20° C. for 60 minutes to obtain a dense ZIF-8 film.

[0035] The obtained ZIF-8 film ...

Embodiment 2

[0037] With Zn(NO 3 ) 2 ·6H 2 O is a ZIF-8 film prepared by metal salt on anodized alumina, using Zn(NO 3 ) 2 ·6H 2 O provides zinc salts, and ZIF-8 films are fabricated ultra-fast on anodized aluminum by an applied electric field method, which specifically includes the following steps:

[0038] (1) The commercial anodized aluminum substrate was rinsed with ethanol for 2 minutes to remove surface stains;

[0039] (2) Prepare the solution required for ZIF-8 film growth: weigh out zinc nitrate hexahydrate (Zn(NO) 3 ) 2 ·6H 2 O) Dissolve 14.9 g of particles in 100 mL of methanol, then add 4.105 g of 2-methylimidazole (C 4 H 6 N 2 ) particles, sonicated at room temperature for 5 minutes to obtain a colorless transparent clear solution;

[0040] (3) Immerse the anodic alumina substrate cleaned in step (1) into the clear solution obtained in step (2); pass 1A current and react at 100° C. for 10 minutes to obtain a dense ZIF-8 film.

[0041] The obtained ZIF-8 film was ch...

Embodiment 3

[0043] With Zn(NO 3 ) 2 ·6H 2 O is a ZIF-8 film prepared by metal salt on anodized alumina, using Zn(NO 3 ) 2 ·6H 2 O provides zinc salts, and ZIF-8 films are fabricated ultra-fast on anodized aluminum by an applied electric field method, which specifically includes the following steps:

[0044] (1) The commercial anodized aluminum substrate was rinsed with ethanol for 2 minutes to remove surface stains;

[0045] (2) Prepare the solution required for ZIF-8 film growth: weigh out zinc nitrate hexahydrate (Zn(NO) 3 ) 2 ·6H 2 O) Dissolve 3.725g of particles in 100mL of methanol, then add 2.05g of 2-methylimidazole (C 4 H 6 N 2 ) particles, sonicated at room temperature for 10 minutes to obtain a colorless transparent clear solution;

[0046] (3) Immerse the anodic alumina substrate cleaned in step (1) into the clear solution obtained in step (2); pass 0.01A current and react at 70°C for 40 minutes to obtain a dense ZIF-8 film.

[0047] The obtained ZIF-8 film was char...

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Abstract

The invention discloses a method for super-rapidly preparing metal-organic framework films through using an external electric field method. The method comprises the following steps: immersing a substrate into a solution of metal salts and organic ligands, applying an external electric field, and directly synthesizing dense metal-organic framework films in one step through a direct current method. The method provided by the invention is used for growing the metal-organic framework films on a porous conductive substrate through the external electric field method, is simple and efficient, and has ultrahigh synthesizing rate and good universality; the processes of activation, pretreatment and the like are eliminated; the operation process is simplified; the production efficiency is greatly improved; meanwhile, the method has the advantages of low cost and low energy consumption; the low-cost and easily available substrate material is combined with the simple and efficient external electric field method; the simplicity and operability of equipment are provided for large-scale production; the large-scale industrial production is facilitated.

Description

technical field [0001] The invention relates to the technical field of metal-organic framework film preparation, in particular to a method for ultra-fast preparation of a metal-organic framework film by using an external electric field method. Background technique [0002] In the important chemical production process, the separation cost of the product has a decisive impact on the overall economic benefit, and is an important indicator that has to be considered. The cost of separation of the product is mainly determined by energy consumption and equipment construction and maintenance. For traditional separation technologies, such as pressure swing adsorption and cryogenic separation, a large amount of equipment investment and energy consumption are required, which greatly increases the cost of separation. For some important energy gases and chemical raw materials, due to the similar physical and chemical properties, the separation difficulty is greatly increased. On the on...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D67/00
CPCB01D67/0002B01D71/06
Inventor 王海辉周胜魏嫣莹侯嘉敏
Owner SOUTH CHINA UNIV OF TECH
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