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Preparation method of graphene oxide/boric acid-based metal organic framework/polyurethane material

An organic framework and graphene technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, organic chemistry, etc., can solve problems such as poor selectivity, secondary environmental pollution, cumbersome operation, etc., and achieve good mechanical properties , the effect of efficient specific recognition ability

Inactive Publication Date: 2018-10-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used separation and purification methods for flavonoids have the following defects: poor selectivity, cumbersome operation, and secondary pollution to the environment

Method used

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  • Preparation method of graphene oxide/boric acid-based metal organic framework/polyurethane material
  • Preparation method of graphene oxide/boric acid-based metal organic framework/polyurethane material
  • Preparation method of graphene oxide/boric acid-based metal organic framework/polyurethane material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of graphene oxide (GO):

[0040] Add 2g of graphite powder and 0.2g of sodium nitrate into 50mL of concentrated sulfuric acid, cool to below 5°C; add 1g of potassium permanganate into the above reaction system, and stir at 30°C for 2 hours; then, slowly add 100mL of distilled water Add to flask until temperature reaches 98°C. Finally, 10 mL of hydrogen peroxide (30%) was added into the reaction system to react for 15 min. Afterwards, 100ml of concentrated hydrochloric acid (5%) was added to the mixture at room temperature and washed with distilled water several times, and finally dried at 60°C.

[0041] (2) Preparation of boric acid-based metal-organic framework (GO@MOF(C)) grown in situ on graphene oxide:

[0042] First, 40 mg of graphene oxide, 5 mg of 3,5-dicarboxyphenylboronic acid, 5 mg of 1,3,5-benzenetricarboxylic acid, 200 mg of zinc nitrate hexahydrate, 5 mL of N,N-dimethyl Formamide was added into a 50mL reactor and ultrasonically dispersed ...

Embodiment 2

[0056] (1) Preparation of graphene oxide (GO):

[0057] First, add 5g of graphite powder and 1g of sodium nitrate into 100mL of concentrated sulfuric acid and cool to below 5°C. Next, 5 g of potassium permanganate was added into the reaction system, and stirred at 30° C. for 2 hours. Subsequently, 150 mL of distilled water was slowly added to the flask until the temperature reached 98°C. Finally, 50 mL of hydrogen peroxide (30%) was added into the reaction system to react for 15 min. Afterwards, 400 mL of concentrated hydrochloric acid (5%) was added to the mixture at room temperature and washed with distilled water several times, and finally dried at 60°C.

[0058] (2) Preparation of boric acid-based metal-organic framework (GO@MOF(C)) grown in situ on graphene oxide:

[0059] First, 50 mg of graphene oxide, 10 mg of 3,5-dicarboxyphenylboronic acid, 10 mg of 1,3,5-benzenetricarboxylic acid, 400 mg of zinc nitrate hexahydrate, 20 mL of N,N-dimethyl Formamide was added into...

Embodiment 3

[0066] (1) Preparation of graphene oxide (GO):

[0067] First, add 3g of graphite powder and 0.5g of sodium nitrate into 69mL of concentrated sulfuric acid, and cool to below 5°C. Secondly, 3g of potassium permanganate was added into the reaction system, and stirred at 30°C for 2 hours; then, 138mL of distilled water was slowly added into the flask until the temperature reached 98°C. Finally, 30mL hydrogen peroxide (30%) was added to the reaction system for 15min. After that, 200mL of concentrated hydrochloric acid (5%) was added to the mixture at room temperature and washed with distilled water several times, and finally dried at 60°C.

[0068] (2) Preparation of boric acid-based metal-organic framework (GO@MOF(C)) grown in situ on graphene oxide:

[0069]First, 45 mg of graphene oxide, 7.8 mg of 3,5-dicarboxyphenylboronic acid, 7.8 mg of 1,3,5-benzenetricarboxylic acid, 300 mg of zinc nitrate hexahydrate, 10 mL of N,N-dimethyl Phenyl formamide was added into a 50mL reacto...

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Abstract

The invention provides a preparation method of a graphene oxide / boric acid-based metal organic framework material / polyurethane sponge composite adsorbent and belongs to the technical field of preparation of environment function materials. The preparation method provided by the invention comprises the following steps: firstly modifying natural flake graphite powder to form graphene oxide, then preparing the graphene oxide / boric acid-based metal organic framework material / polyurethane sponge composite adsorbent material (PU@GO@MOF(C)) by taking graphene oxide (GO) as a substrate material; and carrying out a series of treatment, so as to obtain an adsorbent, and applying the adsorbent to selective recognition and separation on luteolin in an aqueous solution. The prepared boronphilic organic framework material has relatively good thermal stability and relatively high adsorption capacity and has acid-base effect, pH value dependent reversible adsorption / release function and obvious LTL molecular recognition performance.

Description

technical field [0001] The invention relates to a preparation method of graphene oxide / boric acid-based metal organic framework / polyurethane material, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] Boron affinity technology is a broad-spectrum affinity technology. In theory, boronic acid ligands can combine with all molecules containing cis-dihydrogen groups under alkaline or neutral conditions. When under acidic conditions, the boronic acid group and the cis-dihydroxy structure will dissociate, and the adsorption and desorption process can be simplified by simply adjusting the pH of the environment to bind / release molecules with a dihydroxy structure. Graphene is a two-dimensional sheet material with a large surface area and good chemical modification properties, making it a good matrix material; at the same time, polyurethane sponge is a non-catalytically active material and a three-dimensional macro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C07D311/30C07D311/40
CPCB01J20/20B01J20/226B01J20/262B01J20/28009B01J2220/46C07D311/30C07D311/40
Inventor 刘树成潘建明朱恒佳周永超姚俊彤
Owner JIANGSU UNIV
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