Enzyme-free electrochemical hydrogen peroxide sensor based on AgNFs-Pt nano-composite material, and preparation

A nano-composite material, hydrogen peroxide technology, applied in the direction of material electrochemical variables, nanotechnology for materials and surface science, scientific instruments, etc., to achieve the effect of regular shape, enhanced catalysis, and beautiful petals

Inactive Publication Date: 2019-08-30
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the specificity is not good, this method has the advantages of high sensitivity, long-term stability, low price, and small requirements on environmental conditions, and has received more and more attention and development.

Method used

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  • Enzyme-free electrochemical hydrogen peroxide sensor based on AgNFs-Pt nano-composite material, and preparation
  • Enzyme-free electrochemical hydrogen peroxide sensor based on AgNFs-Pt nano-composite material, and preparation
  • Enzyme-free electrochemical hydrogen peroxide sensor based on AgNFs-Pt nano-composite material, and preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Embodiment 1, the preparation of silver micron flower (AgNFs)

[0042] Get 50mL sample bottle, BSA solution (5mg mL -1 ,10mL) with AgNO 3 The solution (10mM, 10mL) was stirred and mixed evenly at room temperature, then heated to 55°C in a water bath, and kept for a period of time, the AA solution (100mg mL -1 , 500 μL) into the mixed solution quickly, and after half an hour of magnetic stirring, the AgNFs solution can be obtained. Take out the completed solution and transfer it to a 50mL centrifuge tube at a centrifugation speed of (5000rpm, 10min), and wash back and forth three times. The final sample solution was freeze-dried, and the obtained AgNFs solid was stored in a 4°C refrigerator for future use.

Embodiment 2

[0043] Embodiment 2, preparation of silver micron flowers (AgNFs-Pt) with pollen particles

[0044] Redissolve the AgNFs solid in 20 mL of water, add H to the AgNFs solution at room temperature 2 PtCl 6 solution (38.6mM, 0.1mL), the rotor stirred fully and reacted for half an hour, then transferred the obtained solution to a 50mL centrifuge tube at a centrifuge speed of (5000rpm, 10min), and washed once to obtain the AgNFs-Pt solution. The final sample solution was freeze-dried, and the obtained AgNFs-Pt solid was stored in a 4°C refrigerator for future use.

Embodiment 3

[0045] Example 3, Construction of AgNFs-Pt enzyme-free electrochemical hydrogen peroxide sensor

[0046] The electrode selected in the experiment is a glassy carbon electrode with a diameter of 3 mm. The modification steps are as follows: the surface of the electrode is polished to a mirror-like smoothness with 0.3 and 0.05 μm aluminum powder, and then, in it mode, HAuCl 4 The solution plated its surface with gold, and a layer of golden yellow gold nanometer layer can be observed on the electrode surface. After rinsing with water and drying with nitrogen gas, AgNFs-Pt solution (3mg mL -1 , 6 μL). The modified electrode was incubated at room temperature for 4 hours, and after the droplet on the surface of the electrode was completely dry, the excess composite material that was not connected by the Au-S bond was washed away with water. In this way, the AgNFs-Pt enzyme-free electrochemical hydrogen peroxide sensor was constructed, and the electrode was stored in a 4°C refrigera...

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PUM

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Abstract

The invention relates to an enzyme-free electrochemical hydrogen peroxide sensor based on an AgNFs-Pt nano-composite material, and preparation. AgNO<3> solution is mixed with bovine serum albumin solution; after stirring, ascorbic acid solution is added; AgNFs solution is obtained by reaction; centrifugal washing is carried out; then, H<2>PtCl<6> solution is added into the washed material; after reaction, the solution is subjected to centrifugal washing, so that AgNFs-Pt solution is obtained; the AgNFs-Pt solution drops on the surface of the working electrode of the electrochemical sensor; andthus, the enzyme-free electrochemical hydrogen peroxide sensor based on the AgNFs-Pt nano-composite material is prepared. Compared with the prior art, an enzyme-free electrochemical hydrogen peroxidesensor construction method is simple, safe and rapid, and has very high sensitivity, wide linear detection range and low detection limit; a signal can be detected at very-low hydrogen peroxide concentration; simultaneously, a method for synthesizing a nano material required by assembling is green, environment-friendly, simple and easy to operate; the catalytic effect is good; and the material canbe used as a novel enzyme-free nano catalytic material.

Description

technical field [0001] The invention relates to a hydrogen peroxide sensor, in particular to an enzyme-free electrochemical hydrogen peroxide sensor based on AgNFs-Pt nanocomposite material and its preparation. Background technique [0002] As we all know, diabetes is a serious disease that threatens human health. As a metabolic disease, diabetes is incurable, especially diabetic patients will have a series of complications in the later stage, such as diabetic nephropathy, diabetic eye complications, diabetic foot, diabetic cardiovascular complications, diabetic cerebrovascular disease and diabetic neuropathy. Lesions etc. These complications will bring great pain and high fatality rate to patients, and greatly hinder the development of human health. At present, the detection of diabetes is mainly based on glucose oxidase, because glucose oxidase can oxidize glucose into gluconolactone and hydrogen peroxide under aerobic conditions, and the detection of hydrogen peroxide (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/327B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00G01N27/308G01N27/3278
Inventor 崔大祥黄志成章阿敏张倩潘少君崔恒滔秦琪
Owner SHANGHAI JIAO TONG UNIV
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