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Hydrogen peroxide non-enzyme sensor based on silver-graphene nano composite and manufacturing method thereof

A nanocomposite and hydrogen peroxide technology, applied in the direction of material electrochemical variables, can solve the problems of cumbersome steps and affecting the performance of catalysts, and achieve the effect of simple steps, potential application prospects, and no environmental pollution

Inactive Publication Date: 2017-02-08
ANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is cumbersome, and the deposited silver nanoparticles are still easy to locally aggregate into other nanostructured substances, such as dendritic nano-deposits, which affect the performance of the catalyst.

Method used

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  • Hydrogen peroxide non-enzyme sensor based on silver-graphene nano composite and manufacturing method thereof
  • Hydrogen peroxide non-enzyme sensor based on silver-graphene nano composite and manufacturing method thereof
  • Hydrogen peroxide non-enzyme sensor based on silver-graphene nano composite and manufacturing method thereof

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Embodiment 1

[0025] A kind of preparation method of the hydrogen peroxide enzyme-free sensor based on silver-graphene nanocomposite, it comprises the steps:

[0026] 1) Weigh 8 mg of graphene oxide and add it to 10 mL of water, ultrasonically dissolve it for 3 h to obtain a graphene oxide dispersion, centrifuge (12 min, 2500 rpm) to remove undissolved graphene oxide, and obtain brown-yellow graphite oxide Alkene solution;

[0027] 2) Configure the electrodeposition solution: to contain AgNO 3 and KNO 3 The mixed solution is used as the electrodeposition solution, wherein, the silver salt AgNO in the electrodeposition solution 3 The concentration is 5 mmol / L, supporting electrolyte KNO 3 The concentration is 0.1 mol / L;

[0028] 3) Use a pipette gun to pipette 10 μL of the graphene oxide solution obtained in step 1) and drop-coat it on the surface of the pretreated glassy carbon electrode, and let it dry at room temperature to obtain a graphene oxide-modified glassy carbon electrode; gla...

Embodiment 2

[0042] A kind of preparation method of the hydrogen peroxide enzyme-free sensor based on silver-graphene nanocomposite, it comprises the steps:

[0043] 1) Weigh 5 mg of graphene oxide and add it to 10 mL of water, ultrasonically dissolve it for 2 h to obtain a graphene oxide dispersion, centrifuge (10 min, 2000 rpm) to remove undissolved graphene oxide, and obtain brown-yellow graphite oxide Alkene solution;

[0044] 2) Configure the electrodeposition solution: to contain AgNO 3 and KNO 3 The mixed solution is used as the electrodeposition solution, wherein, the silver salt AgNO in the electrodeposition solution 3 The concentration is 1 mmol / L, the supporting electrolyte KNO 3 The concentration is 0.05 mol / L;

[0045] 3) Use a pipette gun to pipette 15 μL of the graphene oxide solution obtained in step 1) and drop-coat it on the surface of the pretreated glassy carbon electrode, and let it dry at room temperature to obtain a graphene oxide-modified glassy carbon electrode...

Embodiment 3

[0048] A kind of preparation method of the hydrogen peroxide enzyme-free sensor based on silver-graphene nanocomposite, it comprises the steps:

[0049] 1) Weigh 10 mg of graphene oxide and add it to 5 mL of water, ultrasonically dissolve it for 3 h to obtain a graphene oxide dispersion, centrifuge (15 min, 3000 rpm) to remove undissolved graphene oxide, and obtain brown-yellow graphite oxide Alkene solution;

[0050] 2) Configure the electrodeposition solution: to contain AgNO 3 and KNO 3 The mixed solution is used as the electrodeposition solution, wherein, the silver salt AgNO in the electrodeposition solution 3 The concentration is 10 mmol / L, the supporting electrolyte KNO 3 The concentration is 0.5 mol / L;

[0051] 3) Use a pipette gun to pipette 10 μL of the graphene oxide solution obtained in step 1) and drop-coat it on the surface of the pretreated glassy carbon electrode, and let it dry at room temperature to obtain a graphene oxide-modified glassy carbon electrode...

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Abstract

The invention relates to a manufacturing method for a hydrogen peroxide non-enzyme sensor based on a silver-graphene nano composite. The manufacturing method comprises the following specific steps of: 1) weighing 5-10mg of graphene oxide, and dissolving the graphene oxide into 5-10 mL of water, thereby obtaining a brown yellow graphene oxide solution; 2) taking a mixed solution containing AgNO3 and KNO3 as an electro-deposition solution; 3) transferring and dispensing 10-15muL of the graphene oxide solution obtained in the step 1) to the surface of a pre-treated glass carbon electrode, and drying in air at the room temperature, thereby obtaining a graphene oxide modified glass carbon electrode; and 4) taking the graphene oxide modified glass carbon electrode as a working electrode, taking a platinum wire electrode as a counter electrode, taking a statured mercurous chloride electrode as a reference electrode, putting the electrodes into the electro-deposition solution prepared in step 2), depositing for 1-3 minutes under constant potential within a range of -0.55V to -0.75V, thereby obtaining a silver-graphene nano composite modified electrode which is used as the hydrogen peroxide non-enzyme sensor. The sensor realizes quick, sensitive and high-selection detection on hydrogen peroxide, and has remarkable advantages in comparison with sensors reported in existing literature.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensors and novel nano functional materials, in particular to a hydrogen peroxide enzyme-free sensor based on a silver-graphene nanocomposite and a preparation method thereof. Background technique [0002] The development of material science has brought opportunities for development in the field of electrochemical applications, and graphene materials are a typical representative of them. Graphene has potential applications in nanoelectronic devices, biosensing, batteries, nanocomposites, and supercapacitors due to its unique sheet nanostructure, good electrical conductivity, and large specific surface area. At present, graphene, as a two-dimensional conductive carbon carrier supported nanoparticle catalyst, has become a research hotspot in the field of electrocatalysis. This nanocomposite material is made of graphene or its derivatives and functional nanomaterials. It is hoped that by tak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 李素娟魏少红程承
Owner ANYANG NORMAL UNIV
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