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Preparation method for PtAuNPs-CTAB-GR modified glassy carbon electrode

A glassy carbon electrode, ptaups-ctab-gr technology, applied in the direction of electrochemical variables of materials, can solve the problems of insufficient electrical properties, large specific surface area, limited application, etc., and achieves good reproducibility and stability. Electrocatalytic activity, sensitivity, fast and easy effect

Inactive Publication Date: 2015-04-22
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology

However, the strong stacking and van der Waals forces between graphene sheets make it easy to agglomerate, so that the advantages of large specific surface area and excellent electrical properties cannot be fully utilized, which seriously limits its application.

Method used

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  • Preparation method for PtAuNPs-CTAB-GR modified glassy carbon electrode
  • Preparation method for PtAuNPs-CTAB-GR modified glassy carbon electrode
  • Preparation method for PtAuNPs-CTAB-GR modified glassy carbon electrode

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Embodiment

[0029] A method for preparing a PtAuNPs-CTAB-GR modified glassy carbon electrode, comprising the following steps:

[0030] a. Under ice-bath conditions, add 2g of graphite to 46mL of concentrated sulfuric acid, keep stirring, add 1g of sodium nitrate and 6g of potassium permanganate, and cool the resulting turbid mixture to room temperature; add 92mL of water to the above mixture, After 15 minutes, add 280mL of warm water to dilute it, then add 30% hydrogen peroxide until the solution turns bright yellow; filter the solution, and dry the obtained graphene oxide in vacuum;

[0031] b. Disperse the vacuum-dried graphene oxide prepared in step a in water, add 25 mL, 0.1 mg / mL CTAB solution dropwise to the graphene oxide dispersion under constant stirring, and ultrasonically obtain CTAB functionalized graphene oxide, That is, CTAB-GO; then add H to the CTAB-GO solution 2 PtCl 6 ·6H 2 O and HAuCl 4 ·3H 2 O solution, and then this mixture in N 2 Ultrasound under the atmosphere...

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Abstract

The invention provides a preparation method for a PtAuNPs-CTAB-GR modified glassy carbon electrode. The preparation method comprises: firstly preparing functionalized graphene oxide from graphene oxide and cetyl trimethyl ammonium bromide (CTAB) under the non-covalent interaction, then directly adding chloroplatinic acid and chloroauric acid into the solution, and using NaBH4 to perform reduction to obtain the bimetallic PtAuNPs-CTAB-GR nanometer composite material. The net-structure graphene oxide provides more active sites for supporting a platinum-gold nanoparticle, and enables the platinum-gold nanoparticle to have relatively small dimension and relatively good dispersity. By combining advantages of graphene and PtAuNPs, the obtained modified glassy carbon electrode has extremely good electric catalytic activity on H2O2, and has the characteristics of high sensitivity, low detection limit and wide linearity scope.

Description

technical field [0001] The invention relates to a preparation method of a PtAuNPs-CTAB-GR modified glassy carbon electrode and the modified electrode pair H 2 o 2 detection. Background technique [0002] hydrogen peroxide (H 2 o 2 ) is a reactive oxygen species (ROS), which is an oxidation product of some metabolic reactions in the human body. h 2 o 2 Concentrations are closely related to human health. Therefore, rapid, accurate and reliable detection of H 2 o 2 has great significance. Existing H 2 o 2 Most of the sensors are enzyme-based biosensors; however, the price of enzymes is relatively expensive, the reaction conditions are relatively harsh, and its stability is highly dependent on the environment. Therefore, the development of enzyme-free H 2 o 2 Sensors are very important. [0003] In recent years, platinum-based bimetallic nanocatalysts have attracted much attention, which are often used to improve the activity of catalysts and reduce the cost of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 刘秀辉刘盼盼卢小泉
Owner NORTHWEST NORMAL UNIVERSITY
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