Graphene polymer electrochemical sensor, preparation method and application of graphene polymer electrochemical sensor in detection of p-nitrophenol

A p-nitrophenol, electrochemical technology, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems of detection limit, insufficient stability of detection range, difficulty in meeting test requirements, complicated and expensive preparation, etc., and achieve linearity Wide detection range, low detection limit, and high selectivity

Active Publication Date: 2021-09-28
BIOLOGY INST OF SHANDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventors have found that these technical solutions are too complicated and expensive to prepare, or face problems such as detection limit, detection range, stability, etc., and it is often difficult to meet the test requirements in the face of actual application test scenarios
Therefore, there is an urgent demand for pNP sensors with low detection limit, wide test range, high stability and low cost in the market.

Method used

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  • Graphene polymer electrochemical sensor, preparation method and application of graphene polymer electrochemical sensor in detection of p-nitrophenol
  • Graphene polymer electrochemical sensor, preparation method and application of graphene polymer electrochemical sensor in detection of p-nitrophenol
  • Graphene polymer electrochemical sensor, preparation method and application of graphene polymer electrochemical sensor in detection of p-nitrophenol

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Experimental program
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Effect test

Embodiment 1

[0052] The carbon electrode of the carbon screen printing electrode (SPE) is used as the working electrode, the carbon counter electrode is used as the counter electrode, and the Ag electrode is used as the reference electrode to form a three-electrode system (C-C-Ag three-electrode), with 0.1M pH 7.0 phosphate Buffer solution (PBS) was used as a supporting electrolyte for electrochemical in situ graphene synthesis.

[0053] Immerse the screen printing under the surface of the supporting electrolyte solution, apply a working voltage of 2.0V to the electrode system through the constant potential mode, and maintain the constant voltage for 200s, take out the working electrode and fully rinse it with deionized water and dry it before use. Then immerse the electrode in the supporting electrolyte solution, perform 20 consecutive scans at -1.5~0V, 100mV / s by cyclic voltammetry, take out the working electrode and fully rinse it with deionized water. Place the electrode in the same PB...

Embodiment 2

[0055] The carbon electrode of the carbon screen printing electrode (SPE) is used as the working electrode, the carbon counter electrode is used as the counter electrode, and the Ag electrode is used as the reference electrode to form a three-electrode system (C-C-Ag three-electrode), with 0.1M pH 7.0 phosphate Buffer solution (PBS) was used as a supporting electrolyte for electrochemical in situ graphene synthesis.

[0056] Immerse the screen printing under the surface of the supporting electrolyte solution, apply a working voltage in the range of 0-2.2V to the electrode system through cyclic voltammetry mode, perform 15 cycles of continuous scanning at a rate of 100mV / s, and take out the working electrode for deionization Rinse thoroughly with water. Then the electrode was immersed in the supported electrolyte solution, and the constant current was placed at -1.8V for continuous treatment for 120s, and the working electrode was taken out and fully rinsed with deionized water...

Embodiment 3

[0058] The carbon electrode of the carbon screen printing electrode (SPE) is used as the working electrode, the carbon counter electrode is used as the counter electrode, and the Ag electrode is used as the reference electrode to form a three-electrode system (C-C-Ag three-electrode), with 0.1M pH 7.0 phosphate Buffer solution (PBS) was used as a supporting electrolyte for electrochemical in situ graphene synthesis.

[0059] Immerse the screen printing under the surface of the supporting electrolyte solution, apply a working voltage of 1.5V to the electrode system through the constant potential mode, and maintain the constant voltage for 240s, take out the working electrode and fully rinse it with deionized water and dry it before use. Then immerse the electrode in the supporting electrolyte solution, perform 25 consecutive scans at -1.5~0V, 120mV / s by cyclic voltammetry, take out the working electrode and fully rinse it with deionized water. Place the electrode in the same PB...

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Abstract

The invention discloses a graphene polymer electrochemical sensor, a preparation method and application of the graphene polymer electrochemical sensor in detection of p-nitrophenol, and the preparation method comprises the following steps of carrying out primary electrochemical treatment on a carbon-based electrode to synthesize graphene in situ on the surface of the carbon-based electrode, and then carrying out secondary electrochemical treatment on the carbon-based electrode with the graphene synthesized on the surface, polycondensating the arginine into poly-arginine, and compounding the poly-arginine with the graphene. The graphene polymer electrochemical sensor provided by the invention is low in sensing detection limit, wide in linear detection range, high in stability and low in cost, can be used for preparing a disposable pNP test strip, and can also be used for in-situ long-time continuous monitoring of pNP.

Description

technical field [0001] The invention relates to the fields of electrochemical sensors, electrochemical processing technology, nanometer materials and analytical chemistry, in particular to a graphene polymer electrochemical sensor, a preparation method and its application in detecting p-nitrophenol. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] p-nitrophenol (p-nitrophenol, pNP, p-nitrophenol) is an important raw material and intermediate product widely used in medicine, agriculture, industry, papermaking and other fields, and has been widely distributed in various water bodies around the world middle. However, pNP is extremely toxic and poses obvious threats to animal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 李一苇肖雷雷马耀宏宋瑾史建国杨俊慧
Owner BIOLOGY INST OF SHANDONG ACAD OF SCI
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