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High-oxidation-reduction-activity bovine serum albumin-carbon nanotube composite electrode, preparation method thereof and application of composite electrode

A composite technology of bovine serum albumin and carbon nanotubes, which is applied in the direction of material analysis, measuring devices, and instruments through electromagnetic means, can solve difficult redox activity and other problems, and achieve easy-to-obtain raw materials, broad application prospects, and good oxidation The effect of reductive activity

Inactive Publication Date: 2018-03-09
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, BSA is an insulating substance, and amino acids such as tryptophan are deeply buried in the hydrophobic cavity of BSA, so it is difficult for BSA to exhibit redox activity in electroanalysis and electrocatalysis.

Method used

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  • High-oxidation-reduction-activity bovine serum albumin-carbon nanotube composite electrode, preparation method thereof and application of composite electrode
  • High-oxidation-reduction-activity bovine serum albumin-carbon nanotube composite electrode, preparation method thereof and application of composite electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Activation process of BSA-CNTs composite electrode

[0026] The preparation and activation of the BSA-CNTs composite electrode in this embodiment are realized by the following methods:

[0027] (1) Use a pH meter to prepare 0.02mol L of pH 7.2 -1 Trishydroxymethylaminomethane / 0.1mol·L -1 NaCl buffer solution, and prepare 10 μmol L -1 Bovine serum albumin (BSA) solution; then add 5mL of BSA solution and 5mg of single-walled carbon nanotubes to the vial in sequence, and use ultrasonic wave and BSA to disperse CNTs under the condition of 10°C water bath, the ultrasonic frequency is 40KHz, and the ultrasonic power is 99W , the time length is 40min, and the BSA-CNTs solution is obtained

[0028] (2) Drop 20 μL of the dispersed BSA-CNTs solution onto the conductive glass ITO, and after air-drying at room temperature, dry at a constant 40°C for 12-20 hours to obtain a bovine serum albumin-carbon nanotube composite electrode (BSA-CNTs composite electrode ). ...

Embodiment 2B

[0032] The redox activity of embodiment 2BSA-CNTs composite electrode

[0033] To clarify the redox activity of the BSA-CNTs composite electrode after activation in Example 1, the specific steps are as follows:

[0034] After adding the prepared buffer solution to the battery as the electrolyte solution, select cyclic voltammetry and set the parameters: potential range 0-0.4V, scan circle 1 circle, change the scan speed 0.05, 0.02, 0.01, 0.005, 0.002, 0.001 in turn V s -1 , the result is as figure 2 shown;

[0035] Depend on figure 2 It can be seen that a pair of redox peaks appearing at 0.19V and 0.12V indicates that the activated BSA-CNTs composite electrode has higher redox activity. Get the reduction peak current density of each scanning speed cyclic voltammetry curve and plot the corresponding scanning speed, the slope of linear fitting k=6.64×10 -5 , the two are linearly correlated (R 2 =0.994), indicating that the surface reaction rate of the electrode is faster...

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Abstract

The invention belongs to the technical field of biomedical composite materials, and discloses a high-oxidation-reduction-activity bovine serum albumin-carbon nanotube composite electrode, a preparation method thereof and an application of the composite electrode. Carbon nanotubes (CNTs) are dispersed under the action of an ultrasonic wave and bovine serum albumin (BSA) and are dropped onto a conductive substrate, the conductive substrate is activated by a drying and continuous circulation voltmeter-ammeter method to prepare the BSA-CNTs composite electrode, and non-oxidation-reduction transthyretin high-oxidation-reduction-activity is given. The preparation method has the advantages that the method is rapid, simple and convenient to operate, low in cost and environmentally friendly, efficient and stable, raw materials are easily acquired and the like. The method has a wide application prospect in the field of biological analysis and electro-catalysis.

Description

technical field [0001] The invention belongs to the technical field of biocomposite materials, and in particular relates to a bovine serum albumin-carbon nanotube composite electrode with high redox activity and its preparation method and application. Background technique [0002] BSA is a carrier protein in living organisms. It is rich in sources, easy to purify, and low in cost. It can be used not only as a template for synthetic materials, but also as a model protein for research. BSA is regarded as an amphoteric surfactant because of its carboxyl and amino groups, and is often used as a dispersant in the field of material synthesis. However, BSA is an insulating substance, and amino acids such as tryptophan are deeply buried in the hydrophobic cavity of BSA, so it is difficult for BSA to exhibit redox activity in electroanalysis and electrocatalysis. [0003] CNTs can be viewed as graphene sheets curled into nanotubes with π-electron delocalized structure and good elec...

Claims

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Application Information

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IPC IPC(8): G01N27/327
CPCG01N27/3277
Inventor 李南希李红
Owner SOUTH CHINA NORMAL UNIVERSITY
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