Three-dimensional graphene-based nanometer metal composite material, preparation method and application thereof

A graphene-based, composite material technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, other chemical processes, etc., can solve problems such as loss of nano-scale particles, loss of activity, and difficulty in recycling , to achieve the effect of fast adsorption, easy recovery and good stability

Active Publication Date: 2014-04-09
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these metal nanoparticles are extremely active, and are prone to oxidation and loss of activity when exposed to air, and are easy to lose and difficult to recycle; in addition, due to the existence of surface effects, nanoparticles are easily agglomerated to form large particles through van der Waals force and magnetic attraction , losing the advantage of nanoparticles

Method used

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  • Three-dimensional graphene-based nanometer metal composite material, preparation method and application thereof
  • Three-dimensional graphene-based nanometer metal composite material, preparation method and application thereof
  • Three-dimensional graphene-based nanometer metal composite material, preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0037] Put the three-dimensional graphene foam into the plasma processor for pretreatment under air atmosphere for 1 min, then rinse it with absolute ethanol, dry it and seal it for later use; add the pretreated graphene to a container containing 100 ml, In the three-necked flask of 0.05 M ferrous sulfate solution, mechanically stir it for 3 min in advance, and the stirring speed is 250 r / min; then slowly add 50 ml, 0.1 M sodium borohydride solution into the three-necked flask, and at the same time, pass in nitrogen for protection , mechanically stirred at 20 oC, the stirring speed was 150 r / min, and the reaction time was 30 min; after that, the solution was filtered out, and the sample was washed repeatedly with deionized water and absolute ethanol, and then put into a vacuum drying oven After drying at 80 oC for 5 h, the obtained sample is a graphene-based nano-iron composite material, and the mass ratio of the nano-metal to graphene is 0.5-5:1.

[0038] Add 200 mg of the ab...

Embodiment 2

[0043] Put the three-dimensional graphene foam into the plasma processor for pretreatment in the air atmosphere for 3 min, then rinse with absolute ethanol, dry it and seal it for future use; add the pretreated graphene to a container containing 100 ml, In the three-necked flask of 0.1 M ferrous sulfate solution, mechanically stir it for 3 minutes in advance, and the stirring speed is 250 r / min; then slowly add 50 ml, 0.2 M sodium borohydride solution into the three-necked flask, and at the same time, pass in nitrogen for protection , mechanically stirred at 20 oC, the stirring speed was 250 r / min, and the reaction time was 15 min; after that, the solution was filtered out, and the sample was washed repeatedly with deionized water and absolute ethanol, and then put into a vacuum drying oven After drying at 80 oC for 5 h, the obtained sample is the graphene-based nano-iron composite.

[0044] Add 200 mg of the above-mentioned graphene-based nano-iron to 50 ml of a solution cont...

Embodiment 3

[0048]Put the three-dimensional graphene foam into the plasma processor for pretreatment in the air atmosphere for 3 min, then rinse with absolute ethanol, dry it and seal it for future use; add the pretreated graphene to a container containing 100 ml, In the three-necked flask with 0.2 M ferrous sulfate solution, mechanically stir it for 3 min in advance, and the stirring speed is 250 r / min; then slowly add 50 ml, 0.4 M sodium borohydride solution into the three-necked flask, and at the same time, pass in nitrogen for protection , mechanically stirred at 20 oC, the stirring speed was 250 r / min, and the reaction time was 15 min; after that, the solution was filtered out, and the sample was washed repeatedly with deionized water and absolute ethanol, and then put into a vacuum drying oven After drying at 80 oC for 5 h, the obtained sample is the graphene-based nano-iron composite. Add nickel chloride to 50 ml aqueous solution containing graphene-based nano-iron, the mass ratio ...

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Abstract

The invention discloses a three-dimensional graphene-based nanometer metal composite material, a preparation method and application thereof. The three-dimensional graphene-based nanometer metal composite material comprises a graphene base body with a three-dimensional porous foam structure, and nano metal particles uniformly loaded on the graphene base body. The preparation method comprises the steps of: performing plasma processing on graphene in an air atmosphere, adding a soluble ferrite solution, uniformly mixing, then adding a reducing agent, and fully reacting under a set condition to obtain the three-dimensional graphene-based nanometer metal composite material. According to the three-dimensional graphene-based nanometer metal composite material, a three-dimensional graphene foam material is taken as a carrier, the nano metal particles uniformly coating the surface of graphene are prepared through a chemical liquid phase reduction method, the dispersibility of the nano particles is improved, the agglomeration is avoided; and meanwhile, the three-dimensional graphene-based nanometer metal composite material is generally of a three-dimensional porous structure, has the advantages of good stability, high degradation activity, high adsorption speed to polluted molecules, and the like, is more easily recovered, and has a wide application prospect in fields of chemical catalysis, sewage treatment and the like.

Description

technical field [0001] The invention relates to a nano-composite material, in particular to a three-dimensional graphene-based nano-metal composite material and its preparation method and application. Background technique [0002] Zero-valent iron (such as iron powder, iron filings, etc.) liquid-phase reduction method is one of the important methods to treat wastewater, especially for some refractory pollution (such as chlorinated organics, nitro compounds and azo dyes, etc.). However, ordinary zero-valent iron has a slow reduction rate and low efficiency due to its large particle size. Due to its small size, large specific surface area, and high surface activity, nano-iron particles can reduce pollutants faster and more efficiently than ordinary zero-valent iron (Environmental Monitoring and Assessment, 2011, Issue 184, page 3643). In addition, studies have shown that the degradation activity of iron-based bimetallic nanoparticles is superior to that of iron nanoparticles ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/70C02F1/28C02F1/58B01J23/745B01J23/755
Inventor 程国胜王炜李宁姜自云
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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