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Preparation method of Co3O4-CuCoO2 nano-net material by using aluminum powder as sacrificial agent

A sacrificial agent, nano-mesh technology, applied in catalyst activation/preparation, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of complex synthesis process, easy blockage of pores, unfavorable reactions, etc. Temperature, strong applicability, and the effect of broadening the temperature window

Active Publication Date: 2019-11-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many challenges due to the difficulty of preparation
Example: Most Co 3 o 4 Both use templates to create holes. This strategy not only complicates the synthesis process, but also easily blocks the pores when compounding with other substances, which is not conducive to the reaction.

Method used

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  • Preparation method of Co3O4-CuCoO2 nano-net material by using aluminum powder as sacrificial agent
  • Preparation method of Co3O4-CuCoO2 nano-net material by using aluminum powder as sacrificial agent
  • Preparation method of Co3O4-CuCoO2 nano-net material by using aluminum powder as sacrificial agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: hexagonal nano network Co-Cu-Al-3-1-10 (n (Co) :n (Cu) :n (Al) =3:1:10) Preparation of materials

[0039] Dissolve 0.8731g of cobalt nitrate hexahydrate and 0.2416g of copper nitrate trihydrate in 30ml of deionized water, stir at room temperature for 30min to form a uniform solution, dissolve 5.611g of potassium hydroxide in 40ml of deionized water, and Under stirring for 30min, a uniform and transparent solution was formed, and the obtained strong alkali solution was dripped into the mixed solution of cobalt nitrate and copper nitrate obtained at a rate of 1ml / min, and 0.2698g of aluminum powder was added, which was transferred to the reaction kettle. Under the condition of ℃ for hydrothermal reaction for 20h, after cooling down to room temperature, wash with water, dry in a vacuum oven at 60℃, and then bake in a muffle furnace at 200℃ for 2h.

Embodiment 2

[0040] Embodiment 2: hexagonal nano network Co-Cu-Al-4-1-10 (n (Co) :n (Cu) :n (Al) =4:1:10) Preparation of materials

[0041] Dissolve 1.1642g of cobalt nitrate hexahydrate and 0.2416g of copper nitrate trihydrate in 30ml of deionized water, stir at room temperature for 30min to form a uniform solution, dissolve 5.611g of potassium hydroxide in 40ml of deionized water, and Under stirring for 30min, a uniform and transparent solution was formed, and the obtained strong alkali solution was dripped into the mixed solution of cobalt nitrate and copper nitrate obtained at a rate of 1ml / min, and 0.2698g of aluminum powder was added, which was transferred to the reaction kettle. Under the condition of ℃ for hydrothermal reaction for 20h, after cooling down to room temperature, wash with water, dry in a vacuum oven at 60℃, and then bake in a muffle furnace at 200℃ for 2h.

Embodiment 3

[0042] Embodiment 3: hexagonal nano network Co-Cu-Al-5-1-10 (n (Co) :n (Cu) :n (Al) =5:1:10) Preparation of materials

[0043] Dissolve 1.4552g of cobalt nitrate hexahydrate and 0.2416g of copper nitrate trihydrate in 30ml of deionized water, stir at room temperature for 30min to form a uniform solution, dissolve 5.611g of potassium hydroxide in 40ml of deionized water, and Under stirring for 30min, a uniform and transparent solution was formed, and the obtained strong alkali solution was dripped into the mixed solution of cobalt nitrate and copper nitrate obtained at a rate of 1ml / min, and 0.2698g of aluminum powder was added, which was transferred to the reaction kettle. Under the condition of ℃ for hydrothermal reaction for 20h, after cooling down to room temperature, wash with water, dry in a vacuum oven at 60℃, and then bake in a muffle furnace at 200℃ for 2h.

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Abstract

The invention discloses a preparation method of a Co3O4-CuCoO2 nano-net material by using aluminum powder as a sacrificial agent. The method comprises the following steps: subjecting copper nitrate, cobalt nitrate, potassium hydroxide and aluminum powder which are adopted as raw materials to a hydrothermal reaction at 200 DEG C for 20 hours, cooling the reaction solution to room temperature, thenperforming centrifugation and washing with water, and drying a product at 60 DGE C in vacuum to obtain the nano-net. The method has good universality and has guiding significance for synthesis of thetransition metal nano-net compound. The material has excellent carbon monoxide preferential oxidation performance, and has potential application value in the aspects of hydrogen purification, proton membrane fuel cells and the like. In addition, the material has excellent catalytic performance in electrocatalytic oxygen evolution reaction, and is expected to promote the progress of electrocatalytic hydrogen production.

Description

technical field [0001] The invention relates to the technical field of preparation methods of functional materials, in particular to a Co 3 o 4 -CuCoO 2 Preparation method of nanomesh material. Background technique [0002] co 3 o 4 With a typical spinel structure, it has very broad application prospects in heterogeneous catalysis, photocatalytic degradation of pollutants, electrocatalytic hydrogen production, lithium-ion batteries, supercapacitors and other fields. However, there are still certain limitations, such as poor ability to adsorb and activate reactants in heterogeneous catalysis, high conversion temperature, etc.; when used in photocatalysis, its narrow band system makes it impossible to effectively use sunlight; in electrocatalytic oxygen evolution Its low activity and poor stability in the reaction; poor cycle stability and rate performance in lithium-ion batteries; in supercapacitors, its low capacitance and short cycle life limit its application. The pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J35/04B01J37/10B82Y30/00B82Y40/00
CPCB01J23/75B01J37/10B82Y30/00B82Y40/00B01J35/56
Inventor 李广社丁俊芳李莉萍王烨徐贤哲
Owner JILIN UNIV
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