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Three-dimensional graphene-based nano-metal composite material, its preparation method and application

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

Active Publication Date: 2016-06-22
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 nano-metal composite material, its preparation method and application
  • Three-dimensional graphene-based nano-metal composite material, its preparation method and application
  • Three-dimensional graphene-based nano-metal composite material, its preparation method and application

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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 and pretreat it under the air atmosphere for 1min, then rinse it with absolute ethanol, dry it and keep it sealed for later use; In the three-necked flask of ferrous sulfate solution, mechanically stir for 3 minutes in advance, and the stirring speed is 250r / min; then slowly add 50ml, 0.1M sodium borohydride solution into the three-necked flask, and at the same time, pass in nitrogen for protection, and carry out at 20oC. Mechanical stirring, the stirring speed is 150r / min, and the reaction time is 30min; after that, the solution is filtered, and the sample is repeatedly washed with deionized water and absolute ethanol, and then put into a vacuum drying oven at 80oC for 5h to obtain the The 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 200mg of the above-mentioned graphene-based nano-iron to 50ml of a solution containing ...

Embodiment 2

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

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

Embodiment 3

[0048]Put the three-dimensional graphene foam into the plasma processor for pretreatment under air atmosphere for 3 minutes, then rinse it with absolute ethanol, dry it and seal it for later use; In the three-necked flask of ferrous sulfate solution, mechanically stir for 3 minutes in advance, and the stirring speed is 250r / min; then slowly add 50ml, 0.4M sodium borohydride solution into the three-necked flask, and at the same time, pass in nitrogen for protection, and carry out at 20oC. Mechanical stirring, the stirring speed is 250r / min, and the reaction time is 15min; after that, the solution is filtered out, and the sample is repeatedly washed with deionized water and absolute ethanol, and then it is put into a vacuum drying oven and dried at 80oC for 5h, and the obtained The sample is graphene-based nano-iron composite. Add nickel chloride to the 50ml aqueous solution containing graphene-based nano-iron, the mass ratio of nickel to iron is 0.5:100, and at the same time fe...

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Abstract

The invention discloses a graphene-based nano-metal composite material, its preparation method and application. The composite material includes a graphene matrix with a three-dimensional porous foam structure and nanometer metal particles uniformly loaded on the graphene matrix; its preparation method includes: performing plasma treatment on graphene in an air atmosphere, and then adding soluble ferrous Salt solution and mixed evenly, then adding reducing agent, after fully reacting under the set conditions, the three-dimensional graphene-based nano-iron composite material is obtained. The present invention uses the three-dimensional graphene foam material as a carrier, and prepares nano-metal particles uniformly coated on the surface of graphene through a chemical liquid phase reduction method, which improves the dispersion of the nano-particles and avoids their agglomeration. It has a three-dimensional porous structure, which has the advantages of better stability, higher degradation activity, faster adsorption of pollutant molecules, and easier recovery. It has broad application prospects in chemical catalysis, sewage treatment and other fields.

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, No. 184, p. 3643). In addition, studies have shown that the degradation activity of iron-based bimetallic nanoparticles is superior to that of iron nanoparticles (Col...

Claims

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Application Information

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Patent Type & Authority Patents(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