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Modified metal organic framework composite material and preparation method and application thereof

A metal-organic framework and composite material technology, which is applied in the field of porous material preparation, can solve problems such as the disclosure of unseen technical solutions, and achieve the effects of good application and economic value, high adsorption rate and stable performance.

Active Publication Date: 2019-04-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is no disclosure of the same technical solution as the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: The structural formula of the modified metal-organic framework composite material is:

[0022] .

[0023] The preparation method of the modified metal-organic framework composite material is as follows:

[0024] Step 1. Add 2g of zirconium chloride particles and 2-aminoterephthalic acid into the N,N-dimethylformamide solution, reflux at 140°C for 15 hours, take out the solid matter and use N,N-di Methylformamide washing, centrifugation and vacuum drying, the resulting product was labeled as UiO-66-NH 2 ; Wherein the mass ratio of zirconium chloride particles to 2-aminoterephthalic acid is 2: 1, and the liquid-solid ratio of N,N-dimethylformamide solution to zirconium chloride particles mL:g is 30:1;

[0025] Step 2, 2g metal-organic framework composite material UiO-66-NH obtained in step 1 2 Add it to N,N-dimethylformamide, then add ethylene glycol diglycidyl ether, reflux reaction at 70°C for 24h, take out the solid substance after the reaction and use ...

Embodiment 2

[0029] Example 2: The structural formula of the modified metal-organic framework composite material is:

[0030] ;

[0031] The preparation method of the modified metal-organic framework composite material is as follows:

[0032] Step 1. Add 2g of zirconium chloride particles and 2-aminoterephthalic acid into the N,N-dimethylformamide solution, reflux at 135°C for 18 hours, take out the solid matter and use N,N-di Methylformamide was washed and centrifuged and dried in vacuum, and the obtained product was labeled as UiO-66-NH 2 ; Wherein the mass ratio of zirconium chloride particles to 2-aminoterephthalic acid is 1.5: 1, and the liquid-solid ratio of N,N-dimethylformamide solution to zirconium chloride particles mL:g is 20:1;

[0033] Step 2, 2g metal-organic framework composite material UiO-66-NH obtained in step 1 2 Add it to N,N-dimethylformamide, then add ethylene glycol diglycidyl ether, reflux reaction at 80°C for 20h, take out the solid substance after the reactio...

Embodiment 3

[0037] Example 3: The structural formula of the modified metal-organic framework composite material is:

[0038] ;

[0039] The preparation method of the modified metal-organic framework composite material is as follows:

[0040] Step 1. Add 2g of zirconium chloride particles and 2-aminoterephthalic acid into the N,N-dimethylformamide solution, reflux at 140°C for 15 hours, take out the solid matter and use N,N-di Methylformamide was washed and centrifuged and dried in vacuum, and the obtained product was labeled as UiO-66-NH 2 Wherein the mass ratio of zirconium chloride particles to 2-aminoterephthalic acid is 1.8: 1, and the liquid-solid ratio of N,N-dimethylformamide solution to zirconium chloride particles mL:g is 25:1;

[0041] Step 2, 2g metal-organic framework composite material UiO-66-NH obtained in step 1 2 Add it to N,N-dimethylformamide, then add ethylene glycol diglycidyl ether, reflux reaction at 90°C for 15h, take out the solid substance after the reaction ...

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PUM

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Abstract

The invention discloses a modified metal organic framework composite material, a preparation method and application, and belongs to the technical field of preparation of porous materials. The structural formula of the material is as shown in specification. The preparation method comprises the following steps: adding a metal organic framework composite material UiO-66-NH2 into N,N-dimethylformamide, then adding ethylene glycol diglycidyl ether and carrying out refluxing reaction, after reaction is finished, washing, separating and drying to obtain MOF-EGD; successively adding MOF-EGD and 2-amino-5-mercapto-1,3,4-thiadiazole in N,N-dimethylformamide solution and carrying out refluxing reaction, and after reaction is finished, washing, separating and drying to obtain the modified metal organic framework composite material MOF-EGD-TTA. The method is simple and is easy to operate, and the prepared modified metal organic framework composite material can serve as an adsorbent to adsorb gold ions in a solution, is simple and convenient to operate, is easily synthesized, is easily separated from an aqueous solution, has high adsorbability and can be recycled.

Description

technical field [0001] The invention relates to a modified metal-organic framework composite material, a preparation method and application, and belongs to the technical field of porous material preparation. Background technique [0002] There is an increasing demand for gold in electronic materials, jewelry, catalysts, and more. Additionally, available gold resources started to dwindle. Therefore, there is growing interest in gold recovery and enrichment. However, the separation of gold ions is always a challenge due to the complex chemistry and overlapping nature, and many methods have been developed to recover gold from aqueous solutions, such as electrolysis, precipitation, solvent extraction, and adsorption. [0003] Among all the above-mentioned methods, the electrolysis method is only suitable for solutions with higher ion solubility, and it is difficult to treat solutions with lower concentrations; the precipitation method is complicated in process, time-consuming ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/00B01D15/08C02F1/28C02F101/20
CPCB01D15/08B01J20/226C02F1/285C02F2101/20
Inventor 王仕兴王晨张利波张冰赵继领
Owner KUNMING UNIV OF SCI & TECH
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