Novel carbon paste electrode and preparation method thereof

Abstract

The invention provides a carbon paste electrode, which can greatly improve the performances of the carbon paste electrode such as electrical conductivity, electrochemical activity, stability and the like. A carbon paste of the carbon paste electrode is made of carbon material powder which is agglutinated by triphenylamine. The carbon paste can greatly improve the electrical conductivity and the electron transfer rate of the electrode, and simultaneously can improve the stability of the electrode. The invention also provides a method for preparing the electrode, which comprises the following steps of: mixing a conducting carbon material with the triphenylamine, and then sufficiently grinding and mixing the mixture; stuffing the even mixture into a clean electrode sleeve, compacting the mixture, and inserting a conducting wire in the rear part of the mixture to prepared a semi-finished product of the electrode; and heating the prepared semi-finished product in a bakingoven, and when the conducting carbon material is combined with the triphenylamine, cooling the mixture at the normal temperature. The electrode prepared by the method enhances the responses to potassium ferricyanide and dopamine. The mechanical properties and the long-term stability of the electrode are also greatly improved. The electrode has the advantages of simple manufacturing, simple and convenient operation, good repeatability and low cost.

Description

technical field The invention belongs to electrochemical analysis, and relates to a novel electrode and a preparation method thereof. Background technique Carbon paste electrode is a type of electrode made by mixing conductive carbon materials, such as graphite powder, with a hydrophobic binder to form a paste, which is then coated on the surface of the electrode rod or filled into the electrode tube. . Carbon paste electrodes have been widely used in electrochemical analysis, biosensor preparation, and environmental monitoring due to their non-toxicity, wide electrochemical window, simple fabrication, low cost, and easy surface renewal. However, carbon paste electrodes also have some disadvantages, such as poor electrical conductivity, low sensitivity, and poor stability. To improve the performance of carbon paste electrodes, a large amount of scientific research has emerged. The most common method is to modify the electrode, but the use of modified electrodes often only...

AI Technical Summary

Problems solved by technology

The technical problem to be solved by the present invention is to overcome the disadvantages of the poor performance of the carbon paste electrode in the prior art, and provide a new type of carbon paste electrode, which can greatly improve the performance of the carbon paste electrode such as conductivity, electrochemical activity and stability, etc.

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