Preparation method of foam nickel-loaded composite nano metal oxide electrode material

A technology of electrode materials and nano-metals, which is applied in the field of preparation of foamed nickel-loaded composite nano-metal oxide electrode materials, can solve problems such as poor practicability, and achieve the effects of good loading capacity, high sensitivity, and avoiding agglomeration

Active Publication Date: 2018-06-12
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the poor practicability of the existing electrode material preparation met...

Method used

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  • Preparation method of foam nickel-loaded composite nano metal oxide electrode material
  • Preparation method of foam nickel-loaded composite nano metal oxide electrode material
  • Preparation method of foam nickel-loaded composite nano metal oxide electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Dissolve 0.29g of zinc nitrate and 0.4g of ammonium nitrate in 1L of distilled water, heat it to 75°C as the electrolyte of the electrolytic cell, and use the 10×10×1.6 foamed nickel with surface pretreatment as the cathode, platinum as the Anode, at a current density of -0.8mA / cm 2 Under the condition of 1.5h, the nickel foam of the cathode was taken out, and dried at 60°C for 10h to obtain ZnO / nickel foam.

[0028] (2) Dissolve 1mmol of cobalt nitrate in 25mL of methanol solution to prepare a uniform solution A, dissolve 4mmol of 2-methylimidazole in 25mL of methanol solution to prepare a uniform solution B, pour B slowly and stir solution, mix well.

[0029] (3) Suspend 10×10×1.6 ZnO / nickel foam in the above mixed solution for 24 hours, take it out, wash it with distilled water and absolute ethanol, and dry it at 60°C for 10 hours to obtain ZnO / ZIFs / nickel foam ;

[0030] (4) Dissolve 4g of nickel nitrate in 1L of ethanol solution to prepare a homogeneous solu...

Embodiment 2

[0041] (1) Dissolve 0.35g of zinc nitrate and 0.5g of ammonium nitrate in 1L of distilled water, heat it up to 50°C as the electrolyte of the electrolytic cell, and use 10×10×1.6 nickel foam with surface pretreatment as the cathode and platinum as the Anode, at a current density of -0.7mA / cm 2 Under the conditions of electrolysis for 2 hours, take out the nickel foam of the cathode, and dry it for 8 hours at 50° C. to obtain ZnO / nickel foam.

[0042] (2) Dissolve 2mmol of cobalt chloride in 50mL of methanol solution to prepare solution A, dissolve 5mmol of 2-methylimidazole in 50mL of methanol solution to prepare solution B, and slowly pour solution B into the stirred solution of A , mixed evenly; hang 10×10×1.6 ZnO / nickel foam in the above mixed solution for 12 hours, take it out, wash it with distilled water and absolute ethanol, and dry it at 40°C for 6 hours to obtain ZnO / ZIFs / foam Nickel: Nickel nitrate is dissolved in a certain amount of ethanol solution to prepare a so...

Embodiment 3

[0046] (1) Dissolve 0.20g of zinc nitrate and 0.6g of ammonium nitrate in 1L of distilled water as the electrolyte of the electrolytic cell, heat it to 95°C, use the surface pretreated 10×10×1.6 foamed nickel as the cathode, and platinum as the Anode, at a current density of -0.9mA / cm 2 Under the conditions of electrolysis for 1 hour, take out the nickel foam of the cathode, and dry it for 12 hours at 80° C. to obtain ZnO / nickel foam.

[0047] (2) 3mmol of cobalt acetate was dissolved in 50mL of methanol solution to prepare solution A, 6mmol of 2-methylimidazole was dissolved in 50mL of methanol solution to prepare solution B, and solution B was slowly poured into the stirred solution of A, Mix evenly; 10×10×1.6mm of ZnO / nickel foam is suspended and placed in the above mixed solution for 36 hours, taken out, washed with distilled water and absolute ethanol, and dried at 80°C for 12 hours to obtain ZnO / ZIFs / nickel foam Dissolve nickel nitrate in a certain amount of ethanol sol...

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Abstract

The invention discloses a preparation method of a foam nickel-loaded composite nano metal oxide electrode material, and aims to solve the technical problem that the existing preparation method of an existing electrode material has poor practicability. The preparation method disclosed by the invention is characterized in that In the technical scheme, foam nickel is adopted as a substrate, and ZnO nanowire and ZIFs -derived Co3O4/NiCo2O4 doubel-shell nano cage structure nano particle material are loaded; ZnO/Co3O4/NiCo2O4/foam nickel is prepared in combination with the large specific surface area and quick electron transmission performance of ZnO as well as the high porosity and excellent catalytic performance of the ZIFs -derived Co3O4/NiCo2O4 double-shell nano cage., ZnO/Co3O4/NiCo2O4/foamnickelwhich has the advantages of goodhigh electrocatalytic activity on H2O2, high sensitivity, low detection limit, wide detection range, goodhigh stability and the like, and avoids the technical problem of frequent agglomeration caused byof a powder modified electrode.

Description

technical field [0001] The invention relates to a method for preparing an electrode material, in particular to a method for preparing a foamed nickel-loaded composite nanometer metal oxide electrode material. Background technique [0002] h 2 o 2 The accurate determination of is of great significance in chemistry, biology, clinical monitoring and environmental protection. Currently H 2 o 2 The detection methods include electrochemical method, high performance liquid chromatography, titration method, fluorescence analysis method, spectrophotometric method, etc. Among them, the electrochemical method is widely studied because of its simple and fast operation, high sensitivity, strong specificity and low detection cost. and apply. Electrochemical detection of H 2 o 2 Sensors are divided into two types: enzyme type and non-enzyme type. Enzyme electrodes have better selectivity to the analyte, but because of their high cost and are easily affected by temperature and pH, wh...

Claims

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Application Information

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IPC IPC(8): B01J23/80
CPCB01J23/002B01J23/80B01J35/0033B01J2523/00B01J2523/27B01J2523/845B01J2523/847
Inventor 李克智薛贝顾生越徐东东
Owner NORTHWESTERN POLYTECHNICAL UNIV
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