Preparation method and application for two-dimensional metal organic framework nanosheet

A metal-organic framework, organic framework technology, applied in nanotechnology, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc. problem, to achieve the effect of promoting industrial application, strong electrochemical signal, excellent catalytic ability

Inactive Publication Date: 2019-10-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, enzymes are expensive, easily inactivated and cannot be reused
However, it is difficult to prepare metal oxides and carbon-based materials modified with noble metal particles, and the operation is complicated and expensive.

Method used

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  • Preparation method and application for two-dimensional metal organic framework nanosheet
  • Preparation method and application for two-dimensional metal organic framework nanosheet
  • Preparation method and application for two-dimensional metal organic framework nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation of embodiment 1 ELM-12 nano sheet

[0049]Weigh 150 mg bulk layered metal organic framework ELM-12 and place it in a 500 mL glass beaker, then add 150 mL of acetone into the beaker. A commercial homogenizer (model: IKA RW20digital) was used to stir for 8 h at a stirring speed of 2000 rpm. In order to prevent the homogenizer with continuous stirring from overheating, intermittent stirring is adopted, that is, stirring for 1 hour and stopping for 0.5 hour. In addition, the organic solvent will volatilize during the stirring process, so the corresponding organic solvent is added during each stirring interval to keep the solvent volume in the beaker at 150 mL. In order to prevent the bulk metal-organic frameworks from settling in the center of the vortex of the solution during the stirring process, a magnetic rotor was added at the bottom of the beaker to stir to prevent the bulk metal-organic frameworks from settling and aggregating. After the stirring wa...

Embodiment 2

[0051] Example 2 Preparation of MOF-2 nanosheets

[0052] Compared with the preparation method of ELM-12 nanosheets in Example 1, the difference is that 150 mg of bulk MOF-2 is weighed and dispersed in 150 mL of acetone, and the rest of the steps and conditions are the same. After centrifuging and concentrating the obtained two-dimensional metal-organic framework nanosheet dispersion, a high-concentration MOF-2 nanosheet acetone dispersion is obtained.

Embodiment 3

[0053] Example 3 Preparation of Cu-TCPP nanosheets

[0054] Compared with the preparation method of ELM-12 nanosheets in Example 1, the difference is that 150 mg bulk Cu-TCPP was weighed and dispersed into 150 mL ethanol, and the rest of the steps and conditions were the same. After centrifuging and concentrating the obtained two-dimensional metal-organic framework nanosheet dispersion, a Cu-TCPP nanosheet ethanol dispersion with a higher concentration was obtained.

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Abstract

The invention discloses a two-dimensional metal organic framework nanosheet and a preparation method thereof. The preparation method comprises the following steps: adding a layered metal organic framework bulk material into a solvent, carrying out stripping under stirring, then carrying out standing to obtain a supernatant, and centrifuging the supernatant so as to obtain a precipitate, i.e., thetwo-dimensional metal organic framework nanosheet. The method provided by the invention can realize large-scale preparation of the two-dimensional metal organic framework nanosheet, and is convenientand practicable in operation. The two-dimensional metal organic framework nanosheet has a thickness of only 1 to 10 nm. The invention also discloses an application of the two-dimensional metal organicframework nanosheet in electrochemical detection of superoxide ions. Specifically, the two-dimensional metal organic framework nanosheet is made into a dispersion which is then subjected to drip-coating of an electrode, and then the superoxide ions are detected through a cyclic voltammetric method or / and an amperometric method. The two-dimensional metal organic framework provided by the inventionhas excellent electrocatalytic performance to the superoxide ions and is capable of converting the superoxide ions into water.

Description

technical field [0001] The invention relates to the technical field of functional nanomaterials, in particular to a preparation method and application of a two-dimensional metal-organic framework nanosheet. Background technique [0002] Metal-organic frameworks (Metal-organic frameworks, MOFs) is an emerging nano-functional material in recent years, which is essentially a highly ordered porous crystalline material formed by the combination of inorganic sites containing metals and organic ligands through coordination bonds. . Compared with conventional porous materials, metal-organic frameworks have many advantages, such as their simple synthesis method, designability of structure and function, and huge specific surface area. The adjustable structure and function of metal-organic frameworks allow researchers to endow metal-organic frameworks with good catalytic performance by selecting appropriate metal ions and organic ligands. Therefore, a large number of electrochemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/00B82Y40/00B01J31/22G01N27/26C08L87/00
CPCB01J31/1691B82Y40/00C08J3/00C08J2387/00G01N27/26
Inventor 王一娴裘启明
Owner ZHEJIANG UNIV
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