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Biological functional multilayer film modified electrode and method for making same

A technology for modifying electrodes and multilayer films, which is applied in the direction of material analysis, instruments, and measuring devices through electromagnetic means, and can solve the problems of poor biocompatibility of inorganic nanosheets

Inactive Publication Date: 2009-03-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rigid structure of inorganic nanosheets can better maintain the structural stability of multilayer films, but the biocompatibility of inorganic nanosheets is often poor

Method used

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  • Biological functional multilayer film modified electrode and method for making same
  • Biological functional multilayer film modified electrode and method for making same
  • Biological functional multilayer film modified electrode and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A. Preparation of magnesium aluminum hydrotalcite nanosheets: Weigh 0.05mol of Mg(NO 3 ) 2 and 0.0125mol of Al(NO 3 ) 3 Dissolve in 100mL deCO2 2 of distilled water. Weigh 0.2mol NaOH and dissolve in 100mL deCO2 2 distilled water to make an alkaline solution with a concentration of 2.0mol / L. The above two solutions were placed in N 2 Dropped into the deCO2 at the same time under protection 2 In the distilled aqueous solution of the solution, adjust the rate of addition of the NaOH solution while adding the salt solution dropwise, and keep the pH value of the system at 7 during the dropwise addition. Put the resulting slurry in N 2 Crystallize at 50°C for 12 hours under protection, and deCO 2 Wash and filter with distilled water, and vacuum-dry the filter cake at room temperature for 12 hours to obtain nitrate-intercalated hydrotalcite powder; weigh 0.05 g of the obtained hydrotalcite product, dissolve it in 100 mL of formamide, heat and stir at 90 ° C for 1.5 h...

Embodiment 2

[0035] A. The preparation method of magnesium aluminum hydrotalcite nanosheets is the same as that in Example 1.

[0036] B. (Magnesium Aluminum Hydrotalcite Nanosheets / Glucose Oxidase / Chitosan / Glucose Oxidase) 3 Preparation of multilayer film modified platinum electrode: clean the platinum electrode, and then use N 2 Blow dry; immerse the electrode in 30g / L sodium polystyrene sulfonate aqueous solution for 15 minutes, take it out, rinse with distilled water, and use N 2 Blow dry; immerse the treated electrode in the magnesium aluminum hydrotalcite nanosheet solution with a concentration of 0.5g / L for 15 minutes, take it out, rinse with distilled water, and wash with N 2 Blow dry; then immerse the electrode in a glucose oxidase aqueous solution with a concentration of 1.0g / L for 20 minutes, take it out, rinse with distilled water, and rinse with N 2 Blow dry; then immerse the electrode in a chitosan solution with a concentration of 0.5g / L and take it out after 20 minutes, ri...

Embodiment 3

[0039] A. Preparation of manganese dioxide nanosheets: 200mL containing 0.6mol / L NaOH and 1.0mol / L H 2 o 2 The mixed solution was quickly added to 100mL containing 0.3mol / L Mn(NO 3 ) 2 solution, stirred and reacted for 20 minutes, filtered, and the filter cake was transferred to a polytetrafluoroethylene container; 30 mL of NaOH solution with a concentration of 2.0 mol / L was added, stirred to form a paste, and the polytetrafluoroethylene container was sealed in a 50 mL hydrothermal In the kettle, hydrothermal treatment was carried out at 150°C for 15 hours; the hydrothermal kettle was naturally cooled to room temperature, the kettle was opened for suction filtration, the filter cake was washed with distilled water until the pH value of the filtrate was 8, and the filter cake was dried in an air atmosphere at 70°C for 6 hours. Obtain layered manganese dioxide; Weigh 4g of layered manganese dioxide solid powder and add to 300mL concentration of 1.0mol / L HNO 3 solution, stirre...

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Abstract

The invention relates to a modified electrode for a bio-functional multilayer film and a preparation method thereof, which belongs to the technical field of an electrochemical biosensor and preparation thereof. The modified electrode for the bio-functional multilayer film is formed by assembling the bio-functional multilayer film on the surface of a base electrode, the composition of the bio-functional multilayer film can be described as (inorganic nano-plate / biological active substance / high polymer / biological active substance)n, and the base electrode is a platinum electrode or a glass-carbon electrode. The modified electrode for the bio-functional multilayer film combines the biocompatibility of the high polymer and the rigid structure of the inorganic nano-plate, and has the advantages of sensitive signal response, high-efficiency catalytic ability, good operation stability and storage stability.

Description

technical field [0001] The invention belongs to the technical field of electrochemical biosensors and preparation thereof, in particular to a biofunctional multilayer membrane modified electrode containing high molecular polymers and inorganic nanosheets and a preparation method for layer-by-layer self-assembly thereof. Background technique [0002] The self-assembled multilayer film is a thin film composed of sequential assembly according to a specific purpose by using the electrostatic force between components of different types and functions. Self-assembled multilayer membranes can greatly enrich the functions of membranes and realize the integration of membrane functions, so they have attracted extensive attention from researchers in different fields. The application of self-assembled multilayer films in the field of biosensors is one of its important applications. [0003] There are many kinds of components that can be used to form self-assembled multilayer films, incl...

Claims

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Application Information

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IPC IPC(8): G01N27/327
Inventor 杨文胜谢青陈旭
Owner BEIJING UNIV OF CHEM TECH
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