Method for preparing functionalized composite nano-fiber modified electrode

Abstract

The invention relates to method for preparing a functionalized composite nano-fiber modified electrode. The method specifically comprises the steps of (1) preparing a spinning solution; (2) preparing composite nano-fibers through electrostatic spinning so as to form a composite nano-fiber PA6-MWNTs modified electrode; (3) carrying out electrical-polymerization thionine functionalization on the composite nano fibers: soaking the composite nano-fiber PA6-MWNTs modified electrode into a polymerization solution containing thionine monomers PTH, applying a voltage to the modified electrode so as to carry out anodizing treatment, then, carrying out cyclic volt-ampere scanning, washing away the thionine monomers, adsorbed to the modified electrode, by using a phosphate buffer solution PBS, forming a functionalized composite nano-fiber electrode modification material PA6-MWNTs / PTH layer on the surface of the electrode after the polymerization reaction is ended, thus obtaining the functionalized composite nano-fiber PA6-MWNTs / PTH modified electrode. According to the method, a functionalized composite nano-fiber electrode modification material which has the characteristics of good stability, large specific surface area, good biocompatibility, high electron transfer rate, uniformly-distributed diameter and pore size, and the like is obtained.

Description

technical field [0001] The invention discloses a preparation method of a functional composite nanofiber modified electrode. The invention belongs to the field of nanometer material modified electrodes. Background technique [0002] Electrospinning modified electrodes is a method of modifying electrodes that has only emerged in recent years, and it has great potential for development. So far, electrospinning modified electrodes can be roughly divided into two categories according to different modification methods: electrospinning directly modified electrodes and indirect modified electrodes. Direct electrospinning electrode modification refers to the use of bare electrodes instead of traditional fiber receiving screens to directly collect the electrospun fibers on the electrode surface. The fiber-modified electrode obtained by this modification method can be applied to electrochemical and biosensors. Electrospinning non-direct modification of electrodes refers to the prepa...

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 [7,8] There are many reports on the modification of various electrodes by nanofibers, but there are common problems such as poor 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 electrodes; and then electrically modified (electropolymerized thionine monomer) to wrap a layer of conductive composite nanofibers with a porous 3D structure and conductive polymers carrying a large number of active groups, thereby obtaining functional composite nanofibers. There are no relevant literature reports on the method of fiber electrode modification materials at home and abroad

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