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COFs material-based electrochemical sensor construction and application

An electrochemical and sensor technology, applied in the field of molecular detection and electrochemical sensors, can solve the problems of high price, cumbersome processing, and long time consumption

Inactive Publication Date: 2018-12-14
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These detection methods are time-consuming, expensive, and sample pretreatment is cumbersome, so it is particularly important to develop fast, accurate, sensitive electrochemical sensors that simultaneously measure acetaminophen and dopamine

Method used

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  • COFs material-based electrochemical sensor construction and application
  • COFs material-based electrochemical sensor construction and application
  • COFs material-based electrochemical sensor construction and application

Examples

Experimental program
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Embodiment Construction

[0037] The preparation, performance and application of the electrochemical sensor based on the COFs material of the present invention will be further described through specific examples below.

[0038] 1. Construction of electrochemical sensors based on COFs materials

[0039] (1) Preparation of COOH-MWCNTs @NRs mixture: Weigh 55 mg carboxyl multi-walled carbon nanotubes and disperse them in 36 mLH 2 SO 4 (98wt%) at room temperature for 1 h; then add 4 mL of H 3 PO 4 (85 wt%) and continue to stir for 15 min, then add 150 mg of potassium permanganate, and stir at 65 °C for 2 h; when the mixture is cooled to room temperature, add 150 ml of ice water containing hydrogen peroxide (2 mL 30%) to quench the reaction off. The reaction mixture was suction-filtered with a 0.22 μm filter membrane, washed repeatedly with a large amount of deionized water until neutral, and dried in a vacuum oven at 60°C for 12 hours; the split carboxyl multi-walled carbon nanotubes treated with mixed ...

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Abstract

The invention discloses a COFs material-based electrochemical sensor construction and application. The construction comprises the steps of preparation of a COOH-MWCNTs@NRs mixed solution, constructionof a COOH-MWCNTs@NRs / GCE electrode, construction of an AuNPs / COOH-MWCNTs@NRs / GCE electrode and construction of a COFs material-based electrochemical sensor. The COFs material-based electrochemical sensor serves as a working electrode, a platinum electrode is taken as a counter electrode, and a saturated calomel electrode is used as a reference electrode, and electrochemical detection on acetaminophen and dopamine is carried out at the same time through a differential pulse voltammetry method, and the maximum peak current is measured; and the concentration of acetaminophen and the concentration of dopamine are calculated according to the linear relation between the maximum peak current and the dopamine concentration. The construction process has the advantages of being high in sensitivity,wide in detection range, low in detection limit, high in stability, high in anti-interference capability and the like.

Description

technical field [0001] The invention relates to a construction method of an electrochemical sensor based on COFs materials, which is mainly used as an electrochemical sensor for detecting acetaminophen (AMP) and dopamine (DA), and belongs to the field of electrochemical sensors and molecular detection. Background technique [0002] In recent years, with the continuous development of various new materials and detection instruments, the exploration of new materials, new detection methods, and new theories, electrochemical sensors have also developed rapidly. Materials with new properties are constantly pouring into the research direction of electrochemical sensors and into practical applications. [0003] Covalent organic frameworks (COFs) are a class of crystalline organic porous materials, based on reversible chemical reactions to connect functional units in the form of covalent bonds into highly ordered two-dimensional layered layer structures or specific three-dimensional ...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/327G01N27/48
CPCG01N27/30G01N27/308G01N27/327G01N27/3275G01N27/3277G01N27/48
Inventor 郭昊贾雪艳王雪娇杨武
Owner NORTHWEST NORMAL UNIVERSITY
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