Modified metal organic framework composite material, preparation method and application

A metal-organic framework and composite material technology, applied in the field of porous material preparation, can solve problems such as low grade, and achieve the effects of stable performance, good selectivity and high adsorption rate

Inactive Publication Date: 2019-03-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Palladium in nature is usually associated with other elements, and the grade is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The modified metal-organic framework composite material has a structural formula of:

[0020] .

[0021] The preparation method of the modified metal-organic framework composite material specifically includes the following steps:

[0022] Step 1. Add 1.5g of zirconium chloride particles and 2-aminoterephthalic acid into the N,N-dimethylformamide solution, and after reflux reaction at 140°C for 24h, take out the solid matter and use N,N- Dimethylformamide 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 1:2, and the liquid-solid ratio of N,N-dimethylformamide solution to zirconium chloride particles is 30:1mL / g;

[0023] Step 2, 1g metal-organic framework composite material UiO-66-NH obtained in step 1 2 Add it to N,N-dimethylformamide, then add pyromellitic dianhydride, reflux reaction at 70°C for 24 hours, take out the solid su...

Embodiment 2

[0027] The modified metal-organic framework composite material has a structural formula of:

[0028] .

[0029] The preparation method of the modified metal-organic framework composite material specifically includes the following steps:

[0030] Step 1. Add 1g of zirconium chloride particles and 2-aminoterephthalic acid to the N,N-dimethylformamide solution, and after reflux reaction at 135°C for 18h, 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 1:1.5, and the liquid-solid ratio of N,N-dimethylformamide solution to zirconium chloride particles is 20:1mL / g;

[0031] Step 2, 1g metal-organic framework composite material UiO-66-NH obtained in step 1 2 Add it to N,N-dimethylformamide, then add pyromellitic dianhydride, reflux reaction at 90°C for 15 hours, take out the solid subs...

Embodiment 3

[0035] The modified metal-organic framework composite material has a structural formula of:

[0036] .

[0037] The preparation method of the modified metal-organic framework composite material specifically includes the following steps:

[0038] Step 1. Add 1g of zirconium chloride particles and 2-aminoterephthalic acid to the N,N-dimethylformamide solution, reflux at 125°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 1:1.8, and the liquid-solid ratio of N,N-dimethylformamide solution to zirconium chloride particles is 25:1mL / g;

[0039] Step 2, 1g metal-organic framework composite material UiO-66-NH obtained in step 1 2 Add it to N,N-dimethylformamide, then add pyromellitic dianhydride, reflux reaction at 80°C for 20h, take out the solid substance after the rea...

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Abstract

The invention relates to a modified metal organic framework composite material, a preparation method and application, and belongs to the technical field of preparation of porous materials. The preparation method comprises the following steps: adding a metal organic framework composite material UiO-66-NH2 in N,N-dimethylformamide, then adding pyromellitic dianhydride, carrying out refluxing reaction for 15-24 h under the condition of 70-90 DEG C, after reaction is finished, taking out solid substances, washing the solid substances with a N,N-dimethylformamide solution, and then drying under vacuum after centrifugal separating to obtain the modified metal organic framework composite material marked as MOF-PMDA. The modified metal organic framework composite material can serve as an adsorbentwhich adsorbs palladium ions in the solution, the preparation method is simple and convenient to operate, synthesis is facilitated, and the modified metal organic framework composite material is easyto be separated from an aqueous solution, has high adsorptivity 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] Palladium is a platinum group metal that can be used in electroplating, catalysts, dental alloys, brazing alloys and various contact materials. It has unique physical and chemical properties and is widely used in chemical catalysis, aerospace, microelectronics technology, exhaust gas purification It plays a key and central role in cutting-edge science and modern industries such as petrochemical, electrical and electronic, environmental protection, biopharmaceuticals, and national defense. Palladium in nature is usually associated with other elements, and the grade is low. With the increasing importance of environmental protection and the in-depth development and application of catalysts, the demand for metal palladium is growing rapidly. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00B01J20/22B01J20/30B01D15/08
CPCB01D15/08B01J20/226C08G83/008
Inventor 王仕兴王晨张利波赵继领张冰
Owner KUNMING UNIV OF SCI & TECH
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