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Preparation method of novel ultrahigh-sensitive ascorbic acid biological sensing material

A biosensing and ascorbic acid technology, which is applied in the field of biosensing and detection, can solve the problems of non-self-supporting and difficult to change the shape, and achieves the effect of improving the active surface area, preventing agglomeration and high sensitivity.

Inactive Publication Date: 2015-01-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the traditional growth method of graphene, all two-dimensional sheet materials are obtained, and the shape is not easy to change and is not self-supporting, which limits further applications.

Method used

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  • Preparation method of novel ultrahigh-sensitive ascorbic acid biological sensing material
  • Preparation method of novel ultrahigh-sensitive ascorbic acid biological sensing material
  • Preparation method of novel ultrahigh-sensitive ascorbic acid biological sensing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take 4 square centimeters of nickel foam after ultrasonic cleaning with ethanol and deionized water to obtain the template required for three-dimensional graphene. The clean nickel foam is loaded in a quartz boat and sent to a CVD tube furnace to ensure air tightness. Pass 150sccm H into the quartz tube 2 and 300sccm Ar, the pressure inside the tube was brought to atmospheric pressure and the temperature was raised to 1000°C within 1 hour. Pour 15 sccm of methane gas with a purity of more than 99% and keep it for 10 minutes, then turn off the methane gas and rapidly cool to room temperature within 10 minutes to obtain nickel three-dimensional graphene. The obtained sample was placed in a 3 M HCl solution and kept at 80°C for 3 hours to remove the nickel template to obtain a three-dimensional self-supporting graphene framework. The three-dimensional graphene was used as the working electrode, the platinum wire was used as the counter electrode, and the calomel electrode...

Embodiment 2

[0040] Take 100 square centimeters of nickel foam and ultrasonically clean it with ethanol and deionized water to obtain the template required for three-dimensional graphene. The clean nickel foam is loaded in a quartz boat and sent to a CVD tube furnace to ensure air tightness. Pass 1000sccmH into the quartz tube 2 and 3000sccmAr, the pressure inside the tube was brought to atmospheric pressure and the temperature was raised to 1000°C within 1 hour. Pour 100sccm of methane gas with a purity of more than 99% and keep it for 10 minutes, then turn off the methane gas and rapidly cool to room temperature within 10 minutes to obtain nickel three-dimensional graphene. The obtained sample was placed in a 3 M HCl solution and kept at 80°C for 3 hours to remove the nickel template to obtain a three-dimensional self-supporting graphene framework. The three-dimensional graphene was used as the working electrode, the platinum wire was used as the counter electrode, and the calomel elect...

Embodiment 3

[0043] Take 4 square centimeters of nickel foam after ultrasonic cleaning with ethanol and deionized water to obtain the template required for three-dimensional graphene. The clean nickel foam is loaded in a quartz boat and sent to a CVD tube furnace to ensure air tightness. Pass 150sccmH into the quartz tube 2 and 300sccmAr, the pressure inside the tube was brought to atmospheric pressure and the temperature was raised to 1000°C within 1 hour. Pour 15 sccm of methane gas with a purity of more than 99% and keep it for 5 minutes, then turn off the methane gas and rapidly cool to room temperature within 10 minutes to obtain nickel three-dimensional graphene. The obtained sample was placed in a 3 M HCl solution and kept at 80°C for 3 hours to remove the nickel template to obtain a three-dimensional self-supporting graphene framework. The three-dimensional graphene was used as the working electrode, the platinum wire was used as the counter electrode, and the calomel electrode wa...

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Abstract

The invention provides a preparation method of a novel ultrahigh-sensitive ascorbic acid biological sensing material. The method comprises the steps of heating foam nickel to 1000 DEG C in the atmosphere of H2 and Ar, introducing high-purity methanol, maintaining the temperature for 10 minutes to adsorb a carbon source, rapidly cooling the nickel to the room temperature to obtain a nickel / graphene three-dimensional network, arranging the sample in a concentrated hydrochloric acid, corroding a nickel template to obtain a self-supporting graphene three-dimensional network, depositing copper particles on the surface of the graphene in an electrochemical method, finally oxidizing the copper in a K2S2O8 and NaOH solution into copper oxide nano-flowers, and finally acquiring the three-dimensional graphene@copper oxide nano-flower biological sensing material. The sensing material prepared according to the method is excellent in electrochemical sensing property and capable of precisely detecting ascorbic acid; moreover, raw materials are cheap and are easily available, the process is simple, the yield is high, and the reproducibility is good.

Description

technical field [0001] The invention designs an ultra-high-sensitivity biosensing material, in particular a three-dimensional graphene copper oxide nanoflower core-shell structure electrochemical biosensing material and its application in ascorbic acid detection, belonging to the field of biosensing and detection. Background technique [0002] Many microorganisms such as cells and bacteria are extremely sensitive to their surrounding macroscopic and microscopic three-dimensional environments, and for cells, their normal metabolism must be attached to a certain three-dimensional structure. With the rapid development of in vitro biosensing, drug carrier, tissue culture and biobattery research, researchers hope to verify that their in vitro results are also applicable to in vivo conditions by simulating the three-dimensional structure of the in vivo environment. Especially in the field of biosensing, researchers hope to simultaneously detect the concentration of the analyte in ...

Claims

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Application Information

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IPC IPC(8): G01N27/327
Inventor 黄靖云马晔蔡斌叶志镇
Owner ZHEJIANG UNIV
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