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Dendritic self-similar metal-organic framework composites and their preparation and application

A technology of metal-organic frameworks and organic ligands, which is applied in the analysis of materials, electrochemical variables of materials, and material analysis through electromagnetic means. It can solve the problems that fractal structures cannot be formed and metal-organic framework materials cannot achieve self-similar growth.

Active Publication Date: 2020-07-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention solves the technical problem that metal-organic framework materials in the prior art cannot realize self-similar growth and cannot form fractal structures

Method used

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  • Dendritic self-similar metal-organic framework composites and their preparation and application
  • Dendritic self-similar metal-organic framework composites and their preparation and application
  • Dendritic self-similar metal-organic framework composites and their preparation and application

Examples

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Embodiment 1

[0032] Fractal structure [Cu-CAT] metal-organic framework composite electrode supported by carbon paper, including fractal structure [Cu-CAT] metal-organic framework and flexible carbon paper; the fractal structure [Cu-CAT] metal-organic framework is uniformly deposited on The flexible carbon paper surface. The [Cu-CAT] metal-organic framework exhibits the shape of a dendritic self-similarity. The branches of the fractal structure [Cu-CAT] are composed of ordered nanorods; the fractal dimension of the metal organic framework of the fractal structure [Cu-CAT] is 1.65. Such as Figure 4 , Figure 5 and Image 6 As shown, its microstructure presents a fractal tree.

[0033] The preparation method of [Cu-CAT] metal-organic framework composite electrode with fractal structure is characterized by the following steps:

[0034] Dissolve copper hydroxide in 0.01mM dilute ammonia water to obtain copper ammonia solution, namely Cu(NH 3 ) 4 (OH) 2 ;

[0035] Cu(NH) obtained in st...

Embodiment 2

[0039] Fractal structure [Cu-CAT] metal-organic framework composite electrode supported by carbon paper, including fractal structure [Cu-CAT] metal-organic framework and flexible carbon paper; the fractal structure [Cu-CAT] metal-organic framework is uniformly deposited on The flexible carbon paper surface. The [Cu-CAT] metal-organic framework exhibits the shape of a dendritic self-similarity. The branches of the fractal structure [Cu-CAT] are composed of ordered nanorods; the fractal dimension of the metal organic framework of the fractal structure [Cu-CAT] is 1.65.

[0040] The preparation method of [Cu-CAT] metal-organic framework composite electrode with fractal structure is characterized by the following steps:

[0041] Copper hydroxide is dissolved in 0.02mM dilute ammonia water to obtain copper ammonia solution, namely Cu(NH 3 ) 4 (OH) 2 ;

[0042] Cu(NH) obtained in step (1) 3 ) 4 (OH) 2 The solution is used as a precursor, and it is slowly evaporated on the fl...

Embodiment 3

[0045] Fractal structure [Cu-CAT] metal-organic framework composite electrode supported by carbon paper, including fractal structure [Cu-CAT] metal-organic framework and flexible carbon paper; the fractal structure [Cu-CAT] metal-organic framework is uniformly deposited on The flexible carbon paper surface. The [Cu-CAT] metal-organic framework exhibits the shape of a dendritic self-similarity. The branches of the fractal structure [Cu-CAT] are composed of ordered nanorods; the fractal dimension of the metal organic framework of the fractal structure [Cu-CAT] is 1.65.

[0046] The preparation method of [Cu-CAT] metal-organic framework composite electrode with fractal structure is characterized by the following steps:

[0047] Copper hydroxide is dissolved in 0.05mM dilute ammonia water to obtain copper ammonia solution, namely Cu(NH 3 ) 4 (OH) 2 ;

[0048] Cu(NH) obtained in step (1) 3 ) 4 (OH) 2 The solution is used as a precursor, and it is slowly evaporated on the fl...

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Abstract

The invention discloses a dendritic self-similar metal organic framework composite material and preparation and application thereof, and belongs to the technical field of nano materials. The metal organic framework material contains copper ions and an organic ligand, wherein the copper ions are connected with the organic ligand through coordinate bonds, the organic ligand is 2,3,6,7,10,11-hexahydroxytriphenyl, and the metal organic framework material is of a dendritic self-similar morphology; and preferably, the metal organic framework material is deposited on flexible carbon paper. A preparation method of the dendritic self-similar metal organic framework composite material comprises the steps: using a copper ammonia solution as a precursor, preparing copper hydroxide of a fractal structure by using a random walk principle, and assembling the copper ions and the organic ligand by a heteroepitaxial assembly method so as to obtain the metal organic framework. When the metal organic framework material is applied to the field of sodium ion electrochemical sensors, a low detection limit, a wide linear range and a high detection sensitivity are exhibited.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a dendritic self-similar metal-organic framework composite material and its preparation and application. Background technique [0002] Metal-organic framework, also known as porous polymer, is an organic-inorganic hybrid material formed by self-assembly of organic ligands and metal ions or clusters. Its internal pore structure can be adjusted, and it has adsorption, optical, and electromagnetic properties. It shows great development potential and bright prospect in the field of modern functional materials. Especially for electrochemical sensors, the internal pore structure of metal-organic frameworks has a significant impact on their electrochemical transport properties. The challenge lies in exploring more properties and developing more functions of MOFs. An effective strategy to explore their physicochemical properties is to control the morphology and size of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00G01N27/30G01N27/333
CPCC08G83/008G01N27/308G01N27/333
Inventor 刘宏芳王正运
Owner HUAZHONG UNIV OF SCI & TECH
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