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A kind of cu/ag/carbon nanotube composite modified glassy carbon electrode and its preparation method and application

A carbon nanotube and glassy carbon electrode technology, which is applied in the preparation of copper-silver-carbon nanotube composite modified glassy carbon electrode, catalysis and detection of nitrite in water, which can solve the difficulty of combination and affect the performance of composite materials, etc. problem, to achieve the effect of simple method, fast response and high current response

Active Publication Date: 2017-10-31
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a chemically inert material, carbon nanotubes are difficult to combine with inorganic compounds. At the same time, carbon nanotubes are accompanied by impurities such as amorphous carbon particles, amorphous carbon fibers, and graphite particles, which will affect the properties of the resulting composite materials.

Method used

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  • A kind of cu/ag/carbon nanotube composite modified glassy carbon electrode and its preparation method and application
  • A kind of cu/ag/carbon nanotube composite modified glassy carbon electrode and its preparation method and application
  • A kind of cu/ag/carbon nanotube composite modified glassy carbon electrode and its preparation method and application

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Effect test

Embodiment 1

[0038] A preparation method for Cu / Ag / multi-walled carbon nanotube composite modified glassy carbon electrode, the steps are as follows:

[0039] 1) The three electrodes used in the electrolytic cell are set, and the three electrodes are composed of a clean glassy carbon working electrode, a platinum counter electrode and an AgCl reference electrode;

[0040] 2) preparing a mixed aqueous solution in which the concentration of carbon nanotubes is 0.25 mg / mL, the concentration of copper chloride is 0.01 mol / L, and the concentration of silver nitrate is 0.2 mmol / L;

[0041] 3) Put the three electrodes in step 1) into the prepared mixed solution to form a three-electrode system electrolytic cell, conduct electrodeposition with a constant potential method, and control the reaction voltage to -0.2V;

[0042] 4) After the reaction, remove the glassy carbon electrode and wash it several times with deionized water to obtain a composite electrode modified by Cu / Ag / carbon nanotubes;

[00...

Embodiment 2

[0046] A preparation method of Cu / Ag / carbon nanotube composite modified glassy carbon electrode, the concentration of carbon nanotubes is 0.1mg / mL, the concentration of copper chloride is 0.01mol / L, and the mixed aqueous solution of silver nitrate concentration is 0.1mmol / L , the control reaction voltage is -0.1V; Others are the same as in Example 1. The detection of nitrite concentration is 1.0×10 -6 mol / L~5.0×10 -6 The response current in the mol / L range is 1.62×10 -6 A~1.76×10 -6 a.

Embodiment 3

[0048] A preparation method of Cu / Ag / carbon nanotube composite modified glassy carbon electrode, the concentration of carbon nanotubes is 0.5mg / mL, the concentration of copper chloride is 0.05mol / L, and the mixed aqueous solution of silver nitrate concentration is 0.5mmol / L , the control reaction voltage is -0.3V; other is the same as embodiment 1. The detection of nitrite concentration is 1.0×10 -6 mol / L~5.0×10 -6 The response current in the mol / L range is 5.56×10 -7 A~9.73×10 -7 a.

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Abstract

The invention discloses a Cu / Ag / carbon nanotube composite modified glassy carbon electrode and its preparation method and application. The preparation method of the composite electrode includes the following steps: (1) glassy carbon working electrode, platinum counter electrode and AgCl The three electrodes composed of specific electrodes and carbon nanotubes, copper chloride and silver nitrate were co-deposited or step-deposited at a constant voltage; (2) after the co-deposition or step-deposition was completed, the glassy carbon electrode was removed and deionized After washing several times, a Cu / Ag / carbon nanotube-modified composite electrode is obtained. The composite electrode of the invention is used for detecting nitrite in water bodies, and the electrode of the invention has the characteristics of simple operation, quick response and high sensitivity.

Description

technical field [0001] The invention relates to a glassy carbon electrode, in particular to the preparation of a glassy carbon electrode modified by a copper-silver-carbon nanotube compound, and a method for the electrode to catalyze and detect nitrite in water. Background technique [0002] Nitrite is an important industrial salt and has been widely used in industrial production. However, when the human body ingests excessive nitrite, the normal hemoglobin in the human body will be converted into methemoglobin, thereby losing the ability to carry oxygen and endangering the human body. . Therefore, the detection of nitrite is a very important and meaningful thing. [0003] For example, the Chinese invention patent application document with publication number CN 104316517A discloses a detection method of nitrite content, comprising the following steps: adding 0.8mL sulfonamide solution, 2.5mL hydrochloric acid solution and 10mL test water sample in a 25mL volumetric flask, m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/416
Inventor 张轶尉晗昱王强李涵婷丛燕青王齐
Owner ZHEJIANG GONGSHANG UNIVERSITY
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