Preparation method and application of a carbon nanomaterial modified nickel foam electrode

A technology of carbon nanomaterials and nickel foam, which is applied in the field of electrochemical detection, can solve the problems of complicated and time-consuming sample pretreatment process, exposure to toxic reagents, sensory fatigue of reviewers, etc., to reduce detection costs, enhance catalytic properties, simplify The effect of the detection step

Active Publication Date: 2019-12-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous testing process, the standard judgment method for labeling the wine age of rice wine was the sensory evaluation method, but this method will be affected by the subjective consciousness of the judges, and continuous work in the same environment will cause sensory fatigue to the judges
Among the current analytical techniques, gas chromatography-mass spectrometry, high-performance liquid chromatography and capillary electrophoresis have all been used to detect the marked wine age of yellow rice wine, but these instruments are very expensive, and the sample pretreatment process is complicated and time-consuming, and will come into contact with toxic reagent
The most important point is that these instruments can only detect the content of a single taste substance in rice wine, and the wine age of rice wine reflects the overall quality of rice wine, not just a few taste substances in rice wine.

Method used

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  • Preparation method and application of a carbon nanomaterial modified nickel foam electrode
  • Preparation method and application of a carbon nanomaterial modified nickel foam electrode
  • Preparation method and application of a carbon nanomaterial modified nickel foam electrode

Examples

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Effect test

Embodiment 1

[0032] The preparation of foamed nickel electrodes modified by multi-walled carbon nanotubes is achieved through the following steps:

[0033] 1) Add 1 mg of multi-walled carbon nanotubes to the organic solvent DFM, and mix it into a suspension of 1 mg / ml, and then in an ultrasonic cleaner, in a water temperature of 25 degrees, ultrasonic for 60 minutes, a uniform Multi-walled carbon nanotube suspension;

[0034] 2) Dilute the hydrochloric acid with a mass fraction of 37% to 3mol / L dilute hydrochloric acid, and cut the commercially available 50cm*50cm foam nickel with a thickness of 1-3mm into several strip-shaped nickel foam electrodes with a size of 5mm*20mm . Then pick one at random and soak it in dilute hydrochloric acid solution to remove oxides on the surface of nickel foam.

[0035] 3) When in use, take out the strip-shaped nickel foam electrode from the dilute hydrochloric acid solution, rinse it with deionized water for 8-10 times, and then dry it. Use a pipette gu...

Embodiment 2

[0037] The preparation of graphene-modified nickel foam electrodes is achieved through the following steps:

[0038] 1) Add 1 mg of graphene to the organic solvent DFM, and make a suspension of 3 mg / ml, and then in the ultrasonic cleaner, in the water temperature of 25 degrees, ultrasonic for 60 minutes, a uniform graphene suspension has been formed. turbid liquid;

[0039]2) Dilute hydrochloric acid with a mass fraction of 37% to 5mol / L dilute hydrochloric acid, and cut the commercially available 50cm*50cm foam nickel into several 5mm*20mm strip-shaped nickel foam electrodes. Then pick one randomly and soak it in dilute hydrochloric acid solution to remove oxides on the surface of nickel foam.

[0040] 3) When in use, take out the strip-shaped nickel foam electrode from the dilute hydrochloric acid solution, rinse it with deionized water for 8-10 times, and then dry it. Use a pipette gun to evenly smear the graphene suspension on the area of ​​5mm*5mm (including the end fac...

Embodiment 3

[0042] 1-year-old, 3-year-old and 5-year-old rice wine from Guyue Longshan were randomly selected from the market as test samples, and the rice wine was stored in an environment of 4 degrees. Before the test, the rice wine was taken out and placed in the environment for 24 hours to reach room temperature. There are 16-24 random test samples of yellow rice wine of each wine age, and 18 test samples are selected in this embodiment, each sample is 50ml, which are placed in a 100ml beaker.

[0043] The foamed nickel electrode modified by the multi-walled carbon nanotubes prepared in Example 1 is used to detect the age of yellow rice wine, specifically through the following steps:

[0044] 1) Insert the foamed nickel electrode modified by multi-walled carbon nanotubes into the electrochemical workstation as the working electrode, wherein the reference electrode adopts a saturated Ag / AgCl electrode with an electrode diameter of 2mm, and the auxiliary electrode adopts an electrode di...

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Abstract

The invention belongs to the technical field of electrochemical analysis detection and discloses a preparation method for a carbon nano-material modified foam nickel electrode. The preparation method comprises the following steps: 1) adding a carbon nano-material into an organic solvent and performing ultrasonic treatment, thereby acquiring a carbon nano-material suspension; 2) placing a foam nickel electrode into a diluted hydrochloric acid, soaking and removing an oxide from the surface of the foam nickel electrode; and 3) uniformly dripping the carbon nano-material suspension onto the surface of the foam nickel electrode treated in the step (2), and then using an infrared lamp for drying the foam nickel electrode, thereby acquiring the carbon nano-material modified foam nickel electrode. An application means adopting the carbon nano-material modified foam nickel electrode for detecting an electrochemical signal with storage age of yellow rice wine and combining a mode recognition method for forecasting the storage age of yellow rice wine. The method has the characteristics of simple manufacturing, high sensitivity and reliability. Mostly, the carbon nano-material modified foam nickel electrode can be reused, the detection precision can be promoted and the detection cost can be further reduced.

Description

technical field [0001] The invention relates to an electrochemical detection method, in particular to a preparation method and application of a carbon nanomaterial modified nickel foam electrode. Background technique [0002] The marked wine age of rice wine refers to the wine age marked on the sales package label, which is calculated on the basis of the weighted average of the wine age of the blended wine, and the marked wine age is not less than 50% of the base wine. [0003] In the current market, due to the lack of effective supervision methods, in order to obtain high profits, unscrupulous traders often use low-labeled rice wine to pass off high-labeled rice wine, or only use a small amount of labeled wine in the process of blending wine. aged base wine. In the previous testing process, the standard judgment method for labeling wine age of rice wine was the sensory evaluation method, but this method will be affected by the subjective consciousness of the judges, and co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 韦真博张伟林王永维王俊程绍明
Owner ZHEJIANG UNIV
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