Preparation method of nano-gold-nanofiber functional composite modified electrode

Abstract

The invention discloses a preparation method for a nanogold-nanofiber functional composite modified electrode. The preparation method specifically comprises the following steps of (1) preparing a spinning solution; (2) performing electrostatic spinning to prepare composite nanofibers to form a composite nanofiber PA6-MCWNTs modified electrode; and (3) performing functionalization on composite nanofibers through electro-deposition nanogold, namely immersing the composite nanofiber PA6-MCWNTs modified electrode into deposition liquid containing HAuCl4, reducing HAuCl4 into nanogold by adopting a multi-potential step change method, and synchronously and directly depositing the nanogold on the surfaces of PA6-MCWNTs composite nanofibers, thus obtaining the nanogold / nanofiber functional composite AuNPs-PA6-MCWNTs modified electrode. The preparation method can be used for obtaining a functional composite electrode modified material with the characteristics of high stability, large specific surface area, high biological compatibility, high electron transmission rate, uniform nano diameter aperture distribution and the like.

Description

technical field [0001] The invention discloses a method for preparing an electrode modified by a nano gold / nano fiber functional composite. The invention belongs to the field of nanometer material modified electrodes. Background technique [0002] The electrode is used as a conductive receiving screen for electrospinning, so that the nanofibers produced by electrospinning are directly adsorbed on the surface of the electrode, and the connection between electrospinning and modified electrodes can be realized. Electrospinning modified electrodes is a method of modifying electrodes that has only emerged in recent years, and it has great potential for development. Compared with the traditional preparation method, the operation process is simple and convenient, which can make the fiber and the electrode directly contact, which is conducive to the rapid and direct transfer of electrons between the fiber and the electrode. The diameter of nanofibers prepared by electrospinning te...

AI Technical Summary

Problems solved by technology

[0003] At present, the application of carbon materials [1-3] ,Metal oxide [4] ,Polymer Materials [5] wait for a single [6] ,complex [7-9] There are many reports on the modification of various electrodes by nanofibers, but there are generally problems such as poor electrical conductivity, stability and biocompatibility of nanofibers, and the specific surface area of ​​modified electrodes is not significantly enlarged.

If it is possible to dope nanomaterials with good conductivity (carboxylated multi-walled carbon nanotubes) and spinnable polymers with good stability (nylon 6) to obtain a precursor electrospinning solution, and obtain conductive composite nanofibers through electrospinning Modified electrode; then through electrical modification (electrodeposition of nano-gold by multi-potential step method), directly deposit a layer of nano-gold particles with good biocompatibility on the conductive composite nanofiber, thus obtaining nano-gold / nanofiber functional composite electrode modification Materials and methods There are no relevant literature reports at home and abroad

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