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Preparation method of mesoporous silica/fluorinated graphene modified carbon paste electrode, carbon paste electrode and application of carbon paste electrode

A technology of mesoporous silica and fluorinated graphene, applied in the field of electrochemical technology detection, can solve the problems of high cost and complicated electrode manufacturing

Inactive Publication Date: 2019-02-15
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of complex electrode manufacturing and high cost, the purpose of the present invention is to provide a method for preparing a mesoporous silica / fluorinated graphene modified carbon paste electrode

Method used

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  • Preparation method of mesoporous silica/fluorinated graphene modified carbon paste electrode, carbon paste electrode and application of carbon paste electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of mesoporous silicon dioxide / fluorinated graphene modified carbon paste electrode, the steps are as follows:

[0025] 1) Mix TEOS, P123, water, ammonia water and ethanol in proportion, put them in a hydrothermal kettle at 160 degrees Celsius for hydrothermal reaction, wash and filter the product after the reaction, and then calcinate at 550 degrees Celsius for 5 hours, after the calcination is completed Obtain mesoporous silica powder;

[0026] 2) Mix 0.2g mesoporous silica, 0.6g graphite and 0.2g fluorinated graphene evenly, add liquid paraffin dropwise and keep grinding until the mixture becomes a paste;

[0027] 3) Put the above paste 3 into the polytetrafluoroethylene tube 2 for compaction, and insert a copper wire 1 as a wire at one end, and grind and polish the other end to form a polished surface 5 of the paste, and obtain mesopores Silica / Fluorinated Graphene Modified Carbon Paste Electrode. Schematic diagram of the structure of the mes...

Embodiment 2

[0030] The preparation method of mesoporous silicon dioxide / fluorinated graphene modified carbon paste electrode, the steps are as follows:

[0031] 1) Mix TEOS, CTAB, water, ammonia water and ethanol in proportion, put them in a hydrothermal kettle at 160 degrees Celsius for hydrothermal reaction, wash and filter the product after the reaction, and then calcinate at 550 degrees Celsius for 5 hours, after the calcination is completed Obtain mesoporous silica powder;

[0032] 2) Mix 0.2g mesoporous silica, 0.7g graphite and 0.1g fluorinated graphene evenly, add liquid paraffin dropwise and keep grinding until the mixture becomes a paste;

[0033] 3) Put the above paste into a polytetrafluoroethylene tube for compaction, insert a copper wire at one end as a wire, and grind and polish the other end to prepare a mesoporous silica / fluorinated graphene modified carbon paste electrode .

Embodiment 3

[0035] The preparation method of mesoporous silicon dioxide / fluorinated graphene modified carbon paste electrode, the steps are as follows:

[0036] 1) Mix silica sol, polyvinylpyrrolidone, water, ammonia water and ethanol in proportion, put them in a hydrothermal kettle at 150 degrees Celsius for hydrothermal reaction, wash and filter the product after the reaction, and then calcinate at 550 degrees Celsius After 6 hours, the mesoporous silica powder was obtained after calcination;

[0037] 2) Mix 0.2g mesoporous silica, 0.6g graphite and 0.1g fluorinated graphene evenly, add liquid paraffin dropwise and keep grinding until the mixture becomes a paste;

[0038] 3) Put the above paste into a polytetrafluoroethylene tube for compaction, insert a copper wire at one end as a wire, and grind and polish the other end to prepare a mesoporous silica / fluorinated graphene modified carbon paste electrode .

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Abstract

The invention discloses a preparation method of a mesoporous silica / fluorinated graphene modified carbon paste electrode, the carbon paste electrode and an application of the carbon paste electrode. Firstly, mesoporous silica is prepared, the prepared mesoporous silica is uniformly mixed with carbon and fluorinated graphene in proportion, then, liquid paraffin is added, the mixture is uniformly mixed to form paste, the paste is placed in a polytetrafluoroethylene tube to be compacted, a copper wire is inserted in one end of the tube to serve as a lead, then, the other end of the electrode is polished, and the mesoporous silica / fluorinated graphene modified carbon paste electrode is thus obtained. The electrode prepared with the method is large in specific surface area, high in heavy metalion selectivity, high in sensitivity and convenient to operate.

Description

technical field [0001] The invention relates to the field of electrochemical technology detection, in particular to a preparation method of a mesoporous silicon dioxide / fluorinated graphene modified carbon paste electrode and its product and application. Background technique [0002] Heavy metal ions have great harm to the environment and human body. With the development of my country's industry and agriculture, various heavy metal ions are released into the environment through various channels, causing pollution to the environment. At the same time, they are enriched in the human body through the biological chain, endangering human life. Therefore, it is of great significance to detect and monitor the concentration of heavy metal ions in the environment. [0003] The electrochemical detection method has high sensitivity, simple operation, and no complicated sample preparation process, and is widely used in the field of heavy metal ion detection. In electrochemical detecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 何丹农阳靖峰赵昆峰童琴代卫国胡丹金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH