Method for preparing high-dispersion graphene loaded Zn-base metal-organic framework composite materials

An organic framework and composite material technology, applied in the field of chemistry, 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.

CN109486210AInactive Publication Date: 2019-03-19ANYANG NORMAL UNIV
4 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-03-19
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for preparing high-dispersion graphene loaded Zn-base metal-organic framework composite materials. The method includes steps of A, uniformly mixing graphene oxide solution and chitosan solution with each other to obtain brown solution, transferring the solution into water bath at the temperature of 80-95 DEG C, stirring the solution for 4-6 h, centrifuging productsand ultrasonically dispersing the products in N,N-dimethylformamide to obtain high-dispersibility graphene; B, adding 200-500 mg of Zn(NO3)2 6H2O, 200-500 mg of 2-methylimidazole, 1-4 g of PVP (polyvinyl pyrrolidone) and 150-500 ml of methyl alcohol into the high-dispersibility graphene obtained at the step A, carrying out reaction for 10-13 h, and centrifuging, washing and drying reaction precipitates to obtain the high-dispersion graphene loaded Zn-base metal-organic framework composite materials. The graphene oxide solution and the chitosan solution have equal volumes. The method has the advantage that the high-dispersion graphene loaded Zn-MOF (metal-organic framework) composite materials prepared by the aid of the method have potential application values in multiple aspects.
Need to check novelty before this filing date? Find Prior Art

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...

Examples

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 mat...