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NiAl-laminated type bimetal hydroxide/carbon nano-tube compound electrode as well as preparation method and application thereof

A layered bimetallic and carbon nanotube technology, applied in the direction of material electrochemical variables, material analysis by electromagnetic means, instruments, etc., can solve the problems of reduced active sites, small specific surface area, poor dispersion, etc., to improve dispersion , The preparation method is simple, the effect of good stability

Inactive Publication Date: 2010-06-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the nano-size effect and the hydrogen bonding between the layered double metal hydroxide grains, the layered double metal hydroxide nanoparticles are agglomerated with each other, which will result in small specific surface area, poor dispersion, and active sites. decrease, which affects its performance

Method used

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  • NiAl-laminated type bimetal hydroxide/carbon nano-tube compound electrode as well as preparation method and application thereof
  • NiAl-laminated type bimetal hydroxide/carbon nano-tube compound electrode as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A. Weigh 2.1810g of Ni(NO 3 ) 2 ·6H 2 O and 0.9378g of Al(NO 3 ) 3 9H 2 O was dissolved in deionized water to prepare Ni(NO 3 ) 2 and Al(NO 3 ) 3 mixed salt, where Ni(NO 3 ) 2 The concentration is 0.15mol / L, Al(NO 3 ) 3 The concentration is 0.05mol / L; NaOH and Na 2 CO 3 Dissolve in deionized water to prepare NaOH and Na 2 CO 3 Mixed salt, wherein the concentration of NaOH is 0.32mol / L, Na 2 CO 3 The concentration is 0.10mol / L; another NaOH supplement with a concentration of 0.32mol / L is prepared with deionized water;

[0025] B. Take 0.5000g of acid-treated carbon nanotubes and 50ml of mixed alkali and add them to the reaction vessel at the same time, so that the concentration of carbon nanotubes in the mixture is 10mg / ml, ultrasonically disperse for 30min, take 50ml of mixed salt and add it dropwise to the reaction vessel Add dropwise NaOH to supplement, control the pH=10.5, and then ultrasonically disperse for 30 minutes until the addition of the mix...

Embodiment 2

[0029] A. prepare several of same concentration and volume with embodiment 1;

[0030] B. Take acid-treated carbon nanotubes and 50ml of mixed alkali and add them to the reaction vessel, wherein the concentration of carbon nanotubes in the medium is 15mg / ml. After ultrasonic dispersion for 30min, add 50ml of the prepared mixed salt dropwise to the reaction vessel In the container, add NaOH dropwise to supplement, control the pH=10.5, and then ultrasonically disperse for 30 minutes until the addition of the mixed salt is completed. After the end, wash with deionized water until neutral, and finally dry the filter cake in an oven at 60° C. for 12 hours to obtain a NiAl-layered double metal hydroxide / carbon nanotube composite.

[0031] C. Take 0.20 g of the compound obtained above and add it into 10 ml of ultrapure water to prepare a solution with a solid content of the compound of 20 mg / ml. Stir magnetically for 3 hours at room temperature, press 0.35 μl / mm 2 The amount is dro...

Embodiment 3

[0033] A. Weigh 2.9080g of Ni(NO 3 ) 2 ·6H 2 O and 1.8756g of Al(NO 3 ) 3 9H 2 O was dissolved in deionized water to prepare Ni(NO 3 ) 2 and Al(NO 3 ) 3 mixed salt, where Ni(NO 3 ) 2 The concentration is 0.20mol / L, Al(NO 3 ) 3 The concentration is 0.10mol / L; Weigh 0.9600g of NaOH and 1.0598g of NaOH 2 CO 3 Dissolve in deionized water to prepare NaOH and Na 2 CO 3 Mixed salt, wherein the concentration of NaOH is 0.48mol / L, Na 2 CO 3 The concentration is 0.20mol / L; another NaOH supplement with a concentration of 0.32mol / L is prepared with deionized water;

[0034] B. Add acid-treated carbon nanotubes and 50ml of mixed alkali into the reaction vessel, wherein the concentration of carbon nanotubes in the medium is 10mg / ml, and after ultrasonic dispersion for 20min, add 50ml of the prepared mixed salt to the reaction vessel dropwise In the container, add NaOH dropwise to supplement, control the pH=9, until the mixed salt is added dropwise, then ultrasonically disp...

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Abstract

The invention provides a NiAl-laminated type bimetal hydroxide / carbon nano-tube compound electrode, a preparation method thereof, and an application of the electrode to the electro-catalytic oxidation of glucose. In the electrode, a glassy carbon electrode is taken as a substrate electrode and coated with a layer of film of a NiAl-laminated type bimetal hydroxide / carbon nano-tube compound. The preparation method comprises the following steps of: enabling laminated type bimetal hydroxide to grow in-situ on the surface of carbon nano-tubes by adopting a coprecipitation method to obtain the laminated type bimetal hydroxide / carbon nano-tube compound; then dispersing the compound into a water solution to prepare a solution; dispensing the solution on the surface of the clean glassy carbon electrode; drying at room temperature to volatilize the solvent and obtain the electrode modified by the laminated type bimetal hydroxide / carbon nano-tube compound. The electrode can be used for the electro-catalytic oxidation of the glucose under an alkaline condition and has favorable electro-catalysis performance and stability with simple synthesis method, low cost and wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrocatalytic electrodes, and relates to a high catalytic activity NiAl-layered double metal hydroxide / carbon nanotube composite modified electrode and a preparation method thereof, and the use of the electrode in electrocatalytic oxidation glucose. technical background [0002] Diabetes has become a health disease that people care about in the 21st century. It is estimated that by 2025, the number of people suffering from diabetes worldwide will double to 3 billion people, so controlling and treating diabetes is a very important task . At present, the concentration of glucose in blood is mainly detected by chromogenic method, fluorescence method and enzyme electrode method, and the enzyme electrode method is mostly reported. As we all know, enzymes have the advantages of high efficiency and specificity, but at the same time, they also have the disadvantages of low catalytic activity, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/327
Inventor 李峰王辉项顼
Owner BEIJING UNIV OF CHEM TECH
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