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Method for preparing polypyrrole-metal organic framework composite material modified electrode by electrochemical synthesis

A metal-organic framework and composite material technology, applied in the field of preparation of electrode modification materials, can solve problems such as the difficulty in building electrochemical sensors and limiting the application of MOFs, and achieve excellent electrical conductivity and electrochemical catalytic performance

Inactive Publication Date: 2019-08-16
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to directly apply MOFs with poor conductivity to the construction of electrochemical sensors, which largely limits the application of MOFs in the field of electrochemical sensing.

Method used

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  • Method for preparing polypyrrole-metal organic framework composite material modified electrode by electrochemical synthesis
  • Method for preparing polypyrrole-metal organic framework composite material modified electrode by electrochemical synthesis
  • Method for preparing polypyrrole-metal organic framework composite material modified electrode by electrochemical synthesis

Examples

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Embodiment 1

[0022] Example 1: A method for preparing polypyrrole-metal-organic framework composite modified electrodes by electrochemical synthesis, and a method for preparing PPY-MOFs composite modified electrodes on screen-printed carbon electrodes (SPCE), using electrochemical methods , polypyrrole PPY is used as an in-situ film-forming material on the electrode surface, and metal-organic framework MOFs are fixed on the solid electrode surface to obtain a PPY-MOFs composite modified electrode.

[0023] Specifically include the following steps:

[0024] (1) SPCE was rinsed three times with ultrapure water, and then dried with nitrogen gas for later use.

[0025] (2) Prepare electropolymerization electrolyte, weigh 1.0 mg CuBTC and disperse in 2 mL 50 mM pyrrole aqueous solution.

[0026] (2) Take 80 μL of the above-mentioned electropolymerization electrolyte and drop it on the working interface of SPCE. PPY-CuBTC / SPCE was prepared by cyclic voltammetry, and the parameters were set as ...

Embodiment 2

[0031] Example 2: A method for preparing polypyrrole-metal-organic framework composite modified electrodes by electrochemical synthesis, and a method for preparing PPY-MOFs composite modified electrodes on the surface of glassy carbon electrodes (GCE), using electrochemical methods, poly Pyrrole PPY is used as an in-situ film-forming substance on the electrode surface, and the metal-organic framework MOFs are immobilized on the solid electrode surface to obtain a PPY-MOFs composite modified electrode.

[0032] Specifically include the following steps:

[0033] (1) After polishing, the GCE was rinsed with ultrapure water and dried with nitrogen gas for later use.

[0034](2) Prepare the electropolymerization electrolyte, which contains 200 mM pyrrole and CuBTC with a concentration of 0.1 mg / mL.

[0035] (3) Immerse the processed GCE as the working electrode in the above-mentioned electropolymerization electrolyte, and prepare PPY-CuBTC / GCE by cyclic voltammetry. The parameters...

Embodiment 3

[0036] Example 3: A method for preparing polypyrrole-metal-organic framework composite modified electrodes by electrochemical synthesis, and a method for preparing PPY-MOFs composite modified electrodes on the surface of gold electrodes (AuE), using electrochemical methods, polypyrrole PPY is used as an in-situ film-forming substance on the electrode surface, and the metal-organic framework MOFs are fixed on the surface of the solid electrode to obtain a PPY-MOFs composite modified electrode.

[0037] Specifically include the following steps:

[0038] (1) After AuE has been polished, rinse it with ultrapure water and dry it with nitrogen gas for later use.

[0039] (2) Prepare electropolymerization electrolyte, which contains 100 mM pyrrole and metal organic framework material CuBTC at a concentration of 0.25 mg / mL.

[0040] (3) Immerse the processed AuE as the working electrode in the above electropolymerization electrolyte, and prepare PPY-CuBTC / AuE by cyclic voltammetry. T...

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Abstract

The invention belongs to the technical field of porous material preparation, and provides a method for preparing a polypyrrole-metal organic framework composite material modified electrode by electrochemical synthesis. The method comprises the steps of preparing a three-electrode system and a polymerization electrolyte; placing a working electrode, a reference electrode and a counter electrode into the polymerization electrolyte; and preparing a PPY-MOFs composite material on the working electrode through a cyclic voltammetry method to obtain the PPY-MOFs composite material modified electrode.By using an electrochemical method and the in-situ film-forming advantage of polypyrrole, MOFs are fixed on the surfaces of the solid electrodes to obtain the PPY-MOFs composite material modified electrode. The obtained PPY-MOFs modified electrode has excellent conductivity and electrochemical catalytic performance; the preparation method is simple, rapid and controllable; in-situ polymerizationis realized; and the PPY-MOFs modified electrode is suitable for construction of an electrochemical sensing functional interface, and can be used for measuring toxic and harmful analytes with relatively weak electrochemical activity in the fields of food safety, environmental detection and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode modification materials, and in particular relates to a method for preparing polypyrrole-metal organic framework composite material modified electrodes by electrochemical synthesis. Background technique [0002] As an emerging crystalline porous material, metal-organic frameworks (MOFs) are constructed by bridging metal ions and organic ligands, which have attracted widespread attention in various applications such as chemical sensing, catalysis, gas storage, and drug delivery. focus on. Compared with other porous materials, MOFs possess unique properties, including large surface area, stable chemical properties, and tunable pore size and function. In recent years, MOFs have been more used in electrochemical sensors and have received more and more attention in this field. The advantages and disadvantages of MOFs immobilization on the electrode surface play a key role in the devel...

Claims

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Application Information

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IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 杨钰昆王小敏尉立刚张国华范三红张锦华郭彩霞
Owner SHANXI UNIV