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Simple and convenient method for preparing carbon nanotube chemically modified electrode

A carbon nanotube and chemical modification technology, which is applied in the field of preparation of carbon nanotube chemically modified electrodes, can solve the problems of high cost, complicated operation and complicated operation, and achieves short reaction time, low preparation cost and good electrochemical performance. Effect

Inactive Publication Date: 2013-04-03
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods require special equipment, complicated operation and high cost.
If the modified electrode is prepared by in-situ growth of carbon nanotubes on the solid electrode by the chemical vapor phase cracking method, it needs to be heated at a high temperature in a tube furnace, and the protective gas, the reducing gas-hydrogen gas, and the supply of carbon are supplied step by step at different temperatures. Source gas, cumbersome operation and high cost

Method used

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  • Simple and convenient method for preparing carbon nanotube chemically modified electrode
  • Simple and convenient method for preparing carbon nanotube chemically modified electrode
  • Simple and convenient method for preparing carbon nanotube chemically modified electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of embodiment of the present invention is, a kind of method for preparing carbon nanotube chemical modification electrode easily, and its steps are:

[0026] A. First, one end surface of the solid electrode material of the cylinder made of graphite is ground and polished to form the electrode surface, and then the solid electrode material of the cylinder is put into a polytetrafluoroethylene electrode sleeve, sealed with silicon rubber, and made The electrode surface is exposed; the catalyst-iron particles for growing carbon nanotubes are deposited on the electrode surface by direct current electrodeposition;

[0027] B. Remove the silicone rubber from the solid electrode material treated in step A, and take it out of the electrode sleeve. After preheating at 500°C for 5 minutes, put the electrode surface into the inner flame of the burning flame of ethanol (alcohol lamp flame) , grow in the inner flame of the flame for 4min; then take the electrode out of the fl...

Embodiment 2

[0031] This example is basically the same as Example 1, the difference is only:

[0032] The solid electrode material of the cylinder in step A is made of glassy carbon; the preheating temperature in step B is 200°C, the time is 1min, the combustion flame is generated by carbon monoxide, and the electrode grows in the inner flame of the flame for 60min .

Embodiment 3

[0034] This example is basically the same as Example 1, the difference is only:

[0035] The solid electrode material of the cylinder in step A is made of platinum; the preheating temperature in step B is 800°C, the time is 30min, the combustion flame is generated by methane, and the electrode grows in the inner flame of the flame for 0.5min ; Soak in concentrated sulfuric acid for 1 hour during acidification treatment.

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Abstract

The invention relates to a simple and convenient method for preparing a carbon nanotube chemically modified electrode. The method comprises the steps that: catalyst particles for growing carbon nanotubes are deposited on the surface of an electrode first by using an electrochemical deposition method; the electrode is put into the inner flame of a burning flame to grow carbon nanotubes in the inner flame of the burning flame; then the electrode is taken from the flame; and finally the electrode is encapsulated to obtain. The method has the advantages that the operation is simple and convenient, the cost is low, the performance of the prepared chemically modified electrode is good and the detection sensitivity is high if the electrode is used as an electrochemical detection electrode.

Description

technical field [0001] The invention relates to a preparation method of a solid electrode, in particular to a preparation method of a carbon nanotube chemically modified electrode. Background technique [0002] Since the Japanese scientist Iijima discovered carbon nanotubes (Carbon nanotubes, referred to as CNTs) in 1991, their unique structures and physical and chemical properties have attracted widespread attention. Carbon Nanotube Chemically Modified Flectrode (CNT-CME) is a modified electrode made of CNT that can exhibit excellent electrochemical performance. Due to its faster electron transfer speed, the response current is larger, Therefore, it is often used as an electrochemical detection electrode, and its detection sensitivity is high. At present, the commonly used CNT-CME includes CNT carbon paste electrode, CNT inlaid electrode, CNT coated electrode, polymer embedded CNT modified electrode, etc. However, in these methods, CNTs are prepared first, and then CNTs a...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 江奇何正文赵勇
Owner SOUTHWEST JIAOTONG UNIV
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