Method for preparing copper oxide/polydopamine/reduced graphene oxide CuO/PDA/rGO

A technology of polydopamine and copper oxide, which is applied in the field of sonochemistry, can solve the problems of poor conductivity and insufficient sensitivity of electrical sensing, and achieve the effects of enhancing conductivity, ensuring integrity and stability, and good interface properties

Inactive Publication Date: 2019-08-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a metal oxide, CuO has the disadvantage of poor electrical conductivity, resulting in insufficient electrical sensing sensitivity.

Method used

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  • Method for preparing copper oxide/polydopamine/reduced graphene oxide CuO/PDA/rGO
  • Method for preparing copper oxide/polydopamine/reduced graphene oxide CuO/PDA/rGO
  • Method for preparing copper oxide/polydopamine/reduced graphene oxide CuO/PDA/rGO

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a) Tris-HCl buffer solution: Take 50ml 0.1mol / L Tris solution in a 100ml volumetric flask, then add 14.7ml0.1mol / L hydrochloric acid and mix well, add water to dilute to 100ml, mix well;

[0027] b) rGO / PDA: Take 60ml of Tris-HCl buffer in a round bottom flask, add 8ml of 5mg / ml GO solution [batch 1] (40mg), sonicate in an ice-water bath for 10min, add 10mg of dopamine hydrochloride powder, and sonicate in an ice-water bath 10min, and then use an ultrasonic horn with an ultrasonic frequency of 20kHz and a rated power of 750W for plug-in reaction, and the ultrasonic power is 225W. Continuous ultrasound and intermittent aeration were used to react respectively, and the cumulative ultrasound was 0.5h, and then centrifuged and washed at 12000r / s, washed twice with ethanol and once with deionized water. Freeze-dry for no more than 24 hours, take out and grind to obtain rGO / PDA powder;

[0028] c) CuO / PDA / rGO: configure 0.01mol / L Cu 2+ Precursor solution, the prepared rGO / P...

Embodiment 2

[0033] a) Tris-HCl buffer solution: Take 50ml 0.1mol / L Tris solution in a 100ml volumetric flask, then add 14.7ml0.1mol / L hydrochloric acid and mix well, add water to dilute to 100ml, mix well;

[0034] b) rGO / PDA: Take 60ml of Tris-HCl buffer in a round bottom flask, add 6ml of 5mg / ml GO solution [batch 1] (30mg), sonicate in an ice-water bath for 10min, add 10mg of dopamine hydrochloride powder, and sonicate in an ice-water bath 10min, and then use an ultrasonic horn with an ultrasonic frequency of 20kHz and a rated power of 750W for plug-in reaction, and the ultrasonic power is 225W. Continuous ultrasound and intermittent aeration were used to react respectively, and the cumulative ultrasound was 0.5h, and then centrifuged and washed at 12000r / s, washed twice with ethanol and once with deionized water. Freeze-dry for no more than 24 hours, take out and grind to obtain rGO / PDA powder;

[0035] c) CuO / PDA / rGO: configure 0.01mol / L Cu 2+The precursor solution is added to the ...

Embodiment 3

[0040] a) Tris-HCl buffer solution: Take 50ml 0.1mol / L Tris solution in a 100ml volumetric flask, then add 14.7ml0.1mol / L hydrochloric acid and mix well, add water to dilute to 100ml, mix well;

[0041] b) rGO / PDA: Take 60ml of Tris-HCl buffer in a round bottom flask, add 4ml of 5mg / ml GO solution [batch 1] (20mg), sonicate in an ice-water bath for 10min, add 10mg of dopamine hydrochloride powder, and sonicate in an ice-water bath 10min, and then use an ultrasonic horn with an ultrasonic frequency of 20kHz and a rated power of 750W for plug-in reaction, and the ultrasonic power is 225W. Continuous ultrasound and intermittent aeration were used to react respectively, and the cumulative ultrasound was 0.5h, and then centrifuged and washed at 12000r / s, washed twice with ethanol and once with deionized water. Freeze-dry for no more than 24 hours, take out and grind to obtain rGO / PDA powder;

[0042] c) CuO / PDA / rGO: configure 0.01mol / L Cu 2+ The precursor solution is added to the...

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Abstract

The invention relates to a method for preparing copper oxide/polydopamine/reduced graphene oxide CuO/PDA/rGO. The method comprises the following steps: firstly, by taking DA (dopamine) as a reducing agent and graphene oxide as a raw material, regulating and controlling process conditions such as the ratio and the reaction time of the raw materials by using an ultrasonic chemical method, so as to prepare rGO/PDA with good conductivity; and by taking rGO/PDA as a conductive substrate, respectively developing two preparation methods for preparing CuO/rGO/PDA by using a one-step method and a two-step method, wherein the two-step method comprises steps of cleaning and freeze-drying the prepared rGO/PDA, mixing the rGO/PDA with a copper salt precursor of a certain ratio, and preparing the CuO/PDA/rGO by regulating and controlling ultrasonic process conditions; and the one-step method comprises steps of directly mixing a copper salt precursor solution with a reaction liquid of the rGO/PDA, and preparing the CuO/PDA/rGO by controlling the ultrasonic process conditions.

Description

technical field [0001] The invention belongs to the field of sonochemistry, and relates to a preparation method of copper oxide / polydopamine / reduced graphene oxide CuO / PDA / rGO. Background technique [0002] Dai et al. developed a general method to prepare a series of metal hydroxides or oxides and graphene composites. Metal ions are added to the graphene oxide solution to combine with oxygen-containing functional groups on the surface of graphene oxide and adsorb on the graphene surface. Metal ions can nucleate, grow, and hydrolyze at these adsorption sites to obtain hydroxides or oxides. [0003] Copper oxide is a p-type semiconductor and has a wide range of applications in the field of electrocatalysis. The nanostructured CuO electrode material has a high specific area and short ion diffusion distance, which can better contact with glucose molecules and charge transfer, thereby effectively improving the electrocatalytic activity of the electrode material. As a metal oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08K3/04C08K3/22G01N27/416C08G73/06
CPCC08G73/0672C08K3/22C08K2003/2248C08L2203/20C08K3/042G01N27/416C08L79/04
Inventor 翟薇张心怡周前陈芳魏炳波
Owner NORTHWESTERN POLYTECHNICAL UNIV
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