Preparation method of electrode modified by carbon nano-tube

Abstract

The invention discloses a carbon nanometer tube modified electrode preparation method, which comprises raw materials solution preparation, carbon nanometer tube galvanic deposit at a glassy carbon electrode surface and layer upon layer static electricity self-assemble process. The invention deposits the carbon nanometer tube with negative charge to the glassy carbon electrode surface by using galvanic deposit technology, thus solving the problem that the belt negative charge quantity is insufficient after the glassy carbon electrode surface pretreatment, then layer upon layer static electricity self-assemble process is carried on in PDDA solution and carbon nanometer tube dispersing liquid, finally the high self-assembled efficiency and stabile modified electrode is obtained. The inventioneffectively modifies carbon nanometer tube in the glassy carbon electrode surface. The formed modified material layer has the catalytic effect to the electrochemistry active material, enhances the examination sensitivity, reduces the oxidizing reaction electric potential, and enhances electrode selectivity and stability.

Description

technical field [0001] The invention relates to a method for preparing carbon nanotube modification. The carbon nanotube modified electrode prepared by the invention is a high-stability and high-sensitivity electrode and can be used to detect thiocholine, glutathione, cysteine, etc. Detection of chemically active substances. Background technique [0002] Due to its special structure and specific properties in physics, chemistry and electronics, carbon nanotubes have broad application prospects in the field of electrochemistry. Numerous studies have shown that the singular electronic properties and high surface-to-volume ratio of carbon nanotubes mean that they can promote electron transfer reactions when used in electrode reactions, and have good catalytic and selective effects on biomolecules. At present, the research on the application of carbon nanotubes in the field of modified electrodes mainly focuses on how to improve their catalytic performance and selectivity, and ...

AI Technical Summary

Problems solved by technology

At present, most applications use the direct drop coating method to prepare carbon nanotube-modified electrodes, that is, the carbon nanotube dispersion is dropped onto the electrode surface, and the solvent is volatilized to realize the modification function. However, this method has serious problems in stability, especially In the flowing and stirring system, the modified layer is easy to fall off, which seriously affects the practical application of the modified electrode.

In addition, some studies have used layer-by-layer self-assembly technology to decorate carbon nanotubes on the electrode surface, but the modification efficiency is low due to insufficient charge on the surface of the glassy carbon electrode.