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Keggin type heteropoly acid functionalized graphene loaded nano copper particle modified electrode and application thereof

A technology for modifying electrodes and heteropolyacids, which is applied in the field of electrochemical analysis and detection to achieve the effects of high sensitivity, good catalytic performance and wide detection range

Active Publication Date: 2015-07-08
山东中合控股集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unique properties of graphene are reflected in its single-layer form, but the van der Waals force between graphene layers can easily lead to its irreversible agglomeration, so avoiding the irreversible agglomeration of graphene is to be solved by using the special properties of graphene The key issue

Method used

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  • Keggin type heteropoly acid functionalized graphene loaded nano copper particle modified electrode and application thereof
  • Keggin type heteropoly acid functionalized graphene loaded nano copper particle modified electrode and application thereof
  • Keggin type heteropoly acid functionalized graphene loaded nano copper particle modified electrode and application thereof

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Experimental program
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Effect test

Embodiment 1

[0025] A preparation method of Keggin type heteropolyacid functionalized graphene-loaded copper nanoparticles modified electrode, the steps are as follows:

[0026] 1) Preparation of Keggin-type heteropolyacid functionalized graphene: put 10mg GR into 10ml 0.05-0.1M PMo 12 In the solution, ultrasonically disperse for 24 hours, and centrifuge until adding PMo 12 Afterwards, its color does not change, and phosphomolybdic acid functionalized graphene is obtained;

[0027] 2) Pretreatment of the glassy carbon electrode: Polish the bare glassy carbon electrode to a mirror surface with 0.3 μm and 0.05 μm alumina powder in sequence, then rinse with double-distilled water, then ultrasonically wash with nitric acid, acetone, and double-distilled water, and finally dry at room temperature;

[0028] 3) A Keggin-type heteropolyacid-functionalized graphene-loaded copper nanoparticle-modified electrode: first, place the pretreated glassy carbon electrode in PDDA solution for 10-20 minutes...

Embodiment 2

[0044] A preparation method of Keggin type heteropolyacid functionalized graphene-loaded copper nanoparticles modified electrode, the steps are as follows:

[0045] 1) Preparation of Keggin-type heteropolyacid-functionalized graphene: put 10mg GR into 10ml of 0.05-0.1M phosphotungstic acid solution, ultrasonically disperse for 24 hours, and centrifuge until the color does not change after adding phosphotungstic acid , to obtain phosphotungstic acid functionalized graphene;

[0046] 2) Pretreatment of the glassy carbon electrode: Polish the bare glassy carbon electrode to a mirror surface with 0.3 μm and 0.05 μm alumina powder in sequence, then rinse with double-distilled water, then ultrasonically wash with nitric acid, acetone, and double-distilled water, and finally dry at room temperature;

[0047] 3) A Keggin-type heteropolyacid-functionalized graphene-loaded copper nanoparticle-modified electrode: first, place the pretreated glassy carbon electrode in PDDA solution for 1...

Embodiment 3

[0050] A preparation method of Keggin type heteropolyacid functionalized graphene-loaded copper nanoparticles modified electrode, the steps are as follows:

[0051] 1) Preparation of Keggin-type heteropolyacid-functionalized graphene: put 10mg GR into 10ml of 0.05-0.1M silicotungstic acid solution, ultrasonically disperse for 24 hours, and centrifuge until the color does not change after adding silicotungstic acid , to obtain silicotungstic acid functionalized graphene;

[0052] 2) Pretreatment of the glassy carbon electrode: Polish the bare glassy carbon electrode to a mirror surface with 0.3 μm and 0.05 μm alumina powder in sequence, then rinse with double-distilled water, then ultrasonically wash with nitric acid, acetone, and double-distilled water, and finally dry at room temperature;

[0053] 3) A Keggin-type heteropoly acid functionalized graphene-loaded copper nanoparticle modified electrode: first place the pretreated glassy carbon electrode in PDDA solution for 10-2...

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Abstract

The invention discloses preparation and application of a Keggin type heteropoly acid functionalized graphene loaded nano copper particle modified electrode. The preparation comprises the following steps: preparing Keggin type heteropoly acid functionalized graphene; pre-treating a glassy carbon electrode; preparing a Keggin type heteropoly acid functionalized graphene thin film which is taken as an ideal platform for loading copper nano-particles by using a layer-by-layer self-assembling method; constructing a Cu / Keggin type heteropoly acid-GR biosensor; and carrying out flexible quantitative analysis and determination on glucose by using a current-time curve method. The preparation and the application have the beneficial effects that a novel sensor constructed by the method has a good catalytic performance on the glucose and has the advantages of good selectivity and stability, high sensitivity, wide detection range and the like.

Description

technical field [0001] The invention relates to the technical field of electrochemical analysis and detection, in particular to the preparation of a Keggin-type heteropolyacid functionalized graphene-loaded copper nanoparticle modified electrode and its application in enzyme-free determination of glucose. Background technique [0002] Glucose detection has been extensively studied because of its clinical importance, especially in diabetic patients. The traditional method for detecting glucose is spectrophotometry, but due to the lack of chromophore and fluorophore ligands of glucose, qualitative and quantitative detection cannot be performed. Electrochemistry is currently the most effective method for detecting glucose due to its simple equipment and operation methods. Glucose amperometric sensors are divided into amperometric glucose oxidase biosensors and enzyme-free sensors. Since Clark and Lyons first reported about glucose oxidase electrodes in 1962, in the past 50 yea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
Inventor 赵凯夏建飞王宗花张菲菲韩秋焕迟德玲李延辉夏延致夏临华
Owner 山东中合控股集团有限公司