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A method for rapidly preparing silver nanosquare-graphene-nickel foam composites

A composite material and graphene technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of poor electrical conductivity, poor mechanical properties, difficulty in recycling, and long time consumption, so as to achieve improved mechanical properties, convenient operation, and reduced The effect of the transfer process

Active Publication Date: 2019-03-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the reduced graphene oxide / silver nanoparticle composites prepared by chemical methods exist in the form of solutions, powders, and aerogels, which are difficult to recycle.
Moreover, its conductivity and mechanical properties are not as good as graphene prepared by CVD method.
And the composite method of silver nanoparticles and graphene reported in general literature needs to use a large amount of reducing agent and needs to consume very long time
At present, the composite structure of graphene and silver nanoparticles prepared by CVD method has also been reported, but its preparation often uses various chemical reagents to modify the surface of CVD graphene without functional groups, and then connects with a linker, and the process steps are complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Preparation of graphene-nickel foam by CVD method: the nickel foam was cleaned with acetone, ethanol, and deionized water for 15-20 min respectively to remove the surface oxide layer, and then washed with N 2 Blow dry; put it into the furnace quartz tube to evacuate, remove the air in the tube, and pass in Ar and H 2 , during the annealing process, the Ar flow rate is 100 sccm, and the H 2 The flow rate is 20sccm, the temperature is raised to 900°C at a rate of 15°C / min, and annealed at this temperature for 30min; when growing graphene, CH 4 and H 2 , the graphene growth process leads to CH 4 The flow rate is 10sccm, and H 2 Flow rate is 50sccm, grow for 5min; disconnect CH after growth 4 , and quickly lower the temperature, and take out the sample after the furnace cools down to room temperature, and obtain a nickel foam material covered with graphene.

[0028] 2) Preparation of silver nanocube: fix the cleaned three-neck flask in an oil bath at 140°C, put in a...

Embodiment 2

[0031] 1) Preparation of graphene-nickel foam by CVD method: wash the nickel foam with acetone, ethanol, and deionized water for 15-20 minutes respectively to remove the surface oxide layer, and then blow dry with N2; put it into the furnace quartz tube to evacuate, and remove The air in the tube is fed with Ar and H 2 , during the annealing process, the Ar flow rate is 110sccm, and the H 2 The flow rate is 30sccm, the temperature is raised to 930°C at a rate of 15°C / min, and annealed at this temperature for 33min; CH is introduced when growing graphene 4 and H 2 , the graphene growth process leads to CH 4 The flow rate is 11sccm, and H 2 Flow rate is 60sccm, grow for 5min; disconnect CH after growth 4 , and quickly lower the temperature, and take out the sample after the furnace cools down to room temperature, and obtain a nickel foam material covered with graphene.

[0032] 2) Preparation of silver nanocube: fix the cleaned three-neck flask in an oil bath at 150°C, put ...

Embodiment 3

[0035] 1) Preparation of graphene-nickel foam by CVD method: the nickel foam was cleaned with acetone, ethanol, and deionized water for 15-20 min respectively to remove the surface oxide layer, and then washed with N 2 Blow dry; put it into the furnace quartz tube to evacuate, remove the air in the tube, and pass in Ar and H 2 , during the annealing process, the Ar flow rate is 120sccm, and the H 2 The flow rate is 40sccm, the temperature is raised to 960°C at a rate of 15°C / min, and annealed at this temperature for 36min; CH is introduced when growing graphene 4 and H 2 , the graphene growth process leads to CH 4 The flow rate is 12sccm, and H 2 Flow rate is 70sccm, grow for 5min; disconnect CH after growth 4 , and quickly lower the temperature, and take out the sample after the furnace cools down to room temperature, and obtain a nickel foam material covered with graphene.

[0036] 2) Preparation of silver nanocube: fix the cleaned three-neck flask in an oil bath at 160...

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Abstract

The invention provides a method for quickly preparing a silver nanoparticle block-graphene-nickel foam composite material. The method mainly comprises the following process steps that (1) a chemical vapor deposition method (CVD) is used for growing a layer of graphene on a nickel foam substrate, and a graphene-nickel foam substrate is prepared; (2) a polyhydric alcohol reduction method is adopted for preparing a silver nanoparticle block; (3) the above graphene-nickel foam substrate material is placed into a reactor with magnetons, the silver nanoparticle block obtained after acetone centrifugal attenuation is added, the reactor is placed into an oil bath pan, the rotating speed is adjusted to be 260 r / min to 360 r / min, heat preservation is carried out at a certain temperature for a certain time, taking out, rinsing and drying are carried out, and the silver nanoparticle block-graphene-nickel foam composite material is obtained; and (4) the obtained silver nanoparticle block-graphene-nickel foam composite material is placed into a tube furnace for annealing treatment.

Description

technical field [0001] The invention relates to a method for rapidly preparing a silver nanosquare-graphene-nickel foam composite material, which belongs to the technical field of material chemical preparation. Background technique [0002] Silver nanoparticles are widely used in antibacterial, optical, catalytic, environmental protection, sensing and biomaterials due to their unique electronic, optical, mechanical and catalytic properties, as well as excellent antibacterial properties, biocompatibility and easy surface modification. field. Graphene is an ideal carrier for loading metal particles due to its high specific surface area, high electrical conductivity, and excellent chemical stability. Utilizing the synergistic effect of the two makes the composite material have excellent catalytic, electrochemical sensing and gas sensing properties. At present, the composite of reduced graphene oxide and silver nanoparticles has been realized for catalysis, sensing and other f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08B22F9/24C01B32/186
CPCB22F9/24C22C1/08
Inventor 郭新立刘闯刘园园祝龙陈忠涛赵丽金开殷亮亮
Owner SOUTHEAST UNIV
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