Preparation method of highly dispersed graphene-supported Zn-based metal-organic framework composites

A composite material and organic framework technology, applied in the chemical field, can solve the problems of low dispersion, insufficient performance of graphene, easy agglomeration into large particles, etc., and achieve the effects of preventing agglomeration, low production cost, and simple preparation method

Inactive Publication Date: 2021-02-19
ANYANG NORMAL UNIV
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Problems solved by technology

However, graphene has a low degree of dispersion in aqueous solution and organic solvent, and is easy to agglomerate into large particles, and the excellent performance of graphene cannot be fully reflected.

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  • Preparation method of highly dispersed graphene-supported Zn-based metal-organic framework composites
  • Preparation method of highly dispersed graphene-supported Zn-based metal-organic framework composites
  • Preparation method of highly dispersed graphene-supported Zn-based metal-organic framework composites

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Embodiment Construction

[0019] The present invention is described in detail below, for the convenience of comparison, the applicant at first carried out the preparation of Zn-based metal-organic framework, the method is as follows: 300 mg of Zn(NO 3 ) 2 · 6H 2 O soluble salt and 350 mg of organic ligand 2-methylimidazole, 1.0 g PVP, 200 mL methanol were evenly mixed, stirred at room temperature for 10 h, and the reaction precipitate was centrifuged at 4000 rpm to separate the precipitate, anhydrous Washed three times with ethanol and dried under vacuum at 30°C. The morphology of the as-synthesized materials was characterized by scanning electron microscopy, as shown in figure 2 shown. figure 2 The spherical Zn-MOF structure with regular morphology is clearly shown, indicating that the synthesis method adopted in the present invention well maintains the typical structure of Zn-MOF;

[0020] The preparation method of highly dispersed graphene-loaded Zn-based metal-organic framework composite mate...

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Abstract

The preparation method of highly dispersed graphene-loaded Zn-based metal-organic framework composite material comprises the following steps: A: equal volumes of graphene oxide solution and chitosan solution are uniformly mixed to obtain a brownish-yellow solution; the solution is transferred to 80°C In a water bath at ~95ºC, stir for 4 h to 6 h, centrifuge the product, and ultrasonically disperse it in N,N-dimethylformamide to obtain highly dispersed graphene; B: in the highly dispersed graphene obtained in step A Add Zn(NO 3 ) 2 ·6H 2 O 200 mg~500mg, 2-methylimidazole 200mg~500mg, PVP 1g~4g, methanol 150ml~500ml, react for 10~13h, and the reaction precipitate is centrifuged, washed and dried to obtain highly dispersed graphene-loaded Zn-based metal organic Skeleton composites. This highly dispersed graphene-supported Zn-MOF composite material has potential application value in many aspects.

Description

technical field [0001] The invention relates to a preparation method of a highly dispersed graphene-loaded Zn-based metal-organic framework composite material, belonging to the field of chemistry. Background technique [0002] Due to its better biocompatible environment, high electronic conductivity and more chemical active sites, graphene has been greatly valued by researchers; however, graphene has a low degree of dispersion in aqueous solutions and organic solvents, and it is easy to Agglomeration into large particles not only reduces the active sites of graphene and other materials for composite, but also affects the interaction between graphene and other materials, which cannot effectively improve the catalytic performance of composite materials. Therefore, it is necessary to continue to explore the preparation methods of highly dispersed graphene-supported Zn-based metal-organic frameworks in order to give full play to the excellent performance of graphene in composite...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L87/00C08L39/06C08K3/04C08G83/00
CPCC08G83/008C08L87/00C08L39/06C08K3/042
Inventor 杨素玲李刚刘盼盼郭紫玲王宇欣谭瑞凡
Owner ANYANG NORMAL UNIV
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