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Porous graphene-gold nanorod modified electrode and preparation method and application thereof

A technology of porous graphene and modified electrodes, applied in the direction of electrochemical variables of materials, etc.

Inactive Publication Date: 2017-09-22
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the defects of the existing detection of hydrogen peroxide, and provide a porous graphene-gold nanorod modified electrode and its preparation method and its application in enzyme-free electrochemical detection of hydrogen peroxide

Method used

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  • Porous graphene-gold nanorod modified electrode and preparation method and application thereof
  • Porous graphene-gold nanorod modified electrode and preparation method and application thereof

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Embodiment 1

[0027] 1. Gold nanorods (AuNRs) are prepared by the traditional seed growth method, and the steps are as follows:

[0028] 1. Preparation of seed solution: first take a 25 mL round bottom flask, add 5 mL of 0.20 M cetyltrimethylammonium bromide (CTAB) solution, put in a magnet, then add 5 mL of 0.00050 M HAuCl 4 solution, stirred slowly until the color of the solution changed from colorless to golden yellow, then quickly added 0.60 mL of freshly prepared ice-cold 0.010 M NaBH to the solution 4 solution (around 0°C), vigorously stirred and mixed for 3 min. due to NaBH 4 is a strong reducing agent, HAuCl 4 Under its action, it is quickly reduced to gold nanoparticles, and the color of the solution changes from golden yellow to brown at this time, and the temperature of the solution is kept at 25°C during the reaction process. Finally, the stirring was stopped and the magnetons were taken out, and the solution was grown at 28 °C in the dark for 2 h to obtain CTAB-stabilized go...

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Abstract

The invention discloses a porous graphene-gold nanorod modified electrode which comprises a substrate electrode, gold nanorod and porous graphene. The gold nanorod and the porous graphene are adhered on the surface of the substrate electrode. The modified electrode has excellent sensitivity and selectivity and high biocompatibility and can be used for electrochemical enzyme-free detection of hydrogen peroxide.

Description

technical field [0001] The invention relates to a porous graphene-gold nanorod modified electrode, a preparation method and application thereof. Background technique [0002] Hydrogen peroxide is a commonly used redox agent and catalyst in the fields of industry, environment, medicine and food. In medicine, hydrogen peroxide (about 30% hydrogen peroxide aqueous solution) is used for sterilization and disinfection. Excess H 2 o 2 A disease that can negatively affect an organism or even cause metabolic disorders. Therefore, fast, efficient and simple detection of H 2 o 2 is of great significance. Electrochemical biosensors have many advantages, such as specificity, sensitivity, convenience and timeliness, few samples, fast response, good repeatability, low cost, and easy learning. Widely used in environmental monitoring, food and drug inspection and quarantine, and medical testing and other fields. [0003] At present, chemiluminescence, fluorescence spectroscopy and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/30G01N27/48
Inventor 卢小泉汝凡王晶陈海咏姬玲霞
Owner NORTHWEST NORMAL UNIVERSITY
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