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Preparation method of ZIF-67/GO composite material

A ZIF-67, 1. ZIF-67 technology, applied in nanotechnology for materials and surface science, cable/conductor manufacturing, nanotechnology, etc., can solve the problems of underutilized high specific surface of graphene oxide, etc. Achieve the effects of enhanced charge transport capability, wide applicability, and easy operation

Active Publication Date: 2019-07-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above-mentioned ZIF-67 / GO composites, ZIF-67 is not well loaded on graphene oxide sheets, and the advantages of high specific surface area of ​​graphene oxide are not fully utilized.

Method used

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  • Preparation method of ZIF-67/GO composite material
  • Preparation method of ZIF-67/GO composite material
  • Preparation method of ZIF-67/GO composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: ultrasonically disperse 8 mg of graphene oxide in 20 mL of deionized water;

[0025] Step 2: 1.264g Co(NO 3 ) 2 '6H 2 O was dissolved in 48mL of methanol, 0.985g of 2-methylimidazole was dissolved in 80mL of methanol, and sonicated for 30min;

[0026] Step 3: Immerse the graphene oxide aqueous solution in 12mL Co(NO 3 ) 2 '6H 2 O and 20mL 2-methylimidazole methanol solution, stirred at room temperature for 0.5h, centrifuged at 9000rpm for 6min, alternately impregnated twice;

[0027] Step 4: Dissolve the product obtained in Step 3 in 20mL methanol for ultrasonic dispersion, and mix with 12mL Co(NO 3 ) 2 '6H 2 O methanol solution was poured into 20mL 2-methylimidazole methanol solution at the same time, and stirred vigorously for 2.5 hours, the color became rich and purplish red;

[0028] Step 5: After centrifuging the purple-red suspension obtained in Step 4, dry it at 80° C. for 6 hours under vacuum.

[0029] Step 6: The purple-red ZIF-67 / GO powder ob...

Embodiment 2

[0032]Step 1: ultrasonically disperse 10 mg of graphene oxide in 20 mL of deionized water;

[0033] Step 2: 1.264g Co(NO 3 ) 2 '6H 2 O was dissolved in 48mL of methanol, 2.624g of 2-methylimidazole was dissolved in 80mL of methanol, and sonicated for 30min;

[0034] Step 3: Immerse the graphene oxide aqueous solution in 12mL Co(NO 3 ) 2 '6H 2 O methanol solution and 20mL 2-methylimidazole methanol solution, stirred at room temperature for 0.5h, centrifuged at 9000rpm for 6min, alternately impregnated twice in a cycle;

[0035] Step 4: Dissolve the product obtained in Step 3 in 20mL methanol for ultrasonic dispersion, and mix with 12mL Co(NO 3 ) 2 '6H 2 O methanol solution was poured into 20mL 2-methylimidazole methanol solution simultaneously, stirred vigorously for 3.5 hours;

[0036] Step 5: After centrifuging the purple suspension obtained in Step 4, dry it at 80° C. for 6 hours under vacuum.

[0037] The ZIF-67 / GO material prepared under this condition has ZIF-67...

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Abstract

The invention discloses a preparation method of a ZIF-67 / GO composite material. The method includes the following steps: firstly, preparing a Co(NO3)2'6H2O methanol solution and a 2-methylimidazole methanol solution; secondly, immersing a graphene oxide dispersion solution in the Co(NO3)2'6H2O and the 2-methylimidazole methanol solution in turn, stirring the mixtures at room temperature, centrifuging the mixtures, and alternately immersing the graphene oxide dispersion solution for 2-3 times; and finally, ultrasonically dispersing a product in methanol, adding the mixture of the product and the methanol and the Co(NO3)2'6H2O methanol solution into the 2-methylimidazole methanol solution, and centrifuging claret suspension to obtain the ZIF-67 / GO composite material. The preparation methodadopts room temperature stirring synthesis method and is simple in operation. The prepared ZIF-67 / GO composite material avoids agglomeration of nanoparticles. The nanoparticles ZIF-67 are uniform in particle size and are uniformly loaded on the surface of graphene oxide, which improves the conductivity and charge transfer ability of the composite material.

Description

technical field [0001] The invention relates to a preparation method of a ZIF-67 / GO composite material, in particular to a preparation method of a nanoporous structure precursor template material based on metal organic framework compound porous ZIF-67 / GO, belonging to the technical field of material preparation. Background technique [0002] MOFs (metal-organic framework compounds) refer to metal-organic framework materials with a periodic network structure formed by self-assembly of organic ligands and metal ions, with high crystallinity, porosity, and strong metal-ligand interactions. And other characteristics, it shows a wide range of application prospects in adsorption, chemical energy storage, catalysis, etc. [0003] The precursor template material based on MOF nanoporous structure can be used as a sacrificial template, and the template can be removed by calcination or etching, and the obtained MOF-derived material can be used for electrochemical energy conversion and ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/60H01M10/0525H01B13/00B82Y30/00
CPCH01M4/364H01M4/60H01M4/483H01M10/0525B82Y30/00H01B13/00Y02E60/10
Inventor 胡艳唐惠梁叶迎华沈瑞琪
Owner NANJING UNIV OF SCI & TECH
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