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Graphene surface modification method based on dry method

A graphene surface and graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of high cost, expensive target materials and magnetron sputtering equipment, etc., achieve less product loss and increase load Transfer effects, effects that require less equipment

Active Publication Date: 2017-06-13
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is simple to operate, the target material and magnetron sputtering equipment are expensive, which makes the cost of the process very high

Method used

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  • Graphene surface modification method based on dry method
  • Graphene surface modification method based on dry method
  • Graphene surface modification method based on dry method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: 1.5g graphene oxide is dissolved in 65% concentrated nitric acid in 50ml mass fraction

[0034] Ultrasonic dispersion with an ultrasonic power of 100W in the liquid for 1h, the mixture was centrifugally filtered, and the filter cake

[0035] Repeatedly washing with deionized water until neutral, and then drying in a vacuum oven at 60°C for 20 hours to obtain roughened graphene oxide for use;

[0036] Step 2: Take 1.0 g of the roughened graphene oxide in step 1 and place it on the planet

[0037] In the type ball mill, the set speed is 150r / min, the ball feeding ratio is 100:1, and the ball mill is 1h.

[0038] After the ball milling was stopped, 6.185g of silver acetate was poured into the ball mill and mixed with graphene oxide.

[0039] Secondary ball milling 1h, obtains the mixture of graphene oxide / silver acetate, for subsequent use;

[0040] Figure 1-3 It is the permeability of graphene oxide in untreated, step one and step two in embodiment 1

[0041...

Embodiment 2

[0050] Step 1: 1.5g graphene oxide is dissolved in 65% concentrated nitric acid in 50ml mass fraction

[0051] Ultrasonic dispersion with an ultrasonic power of 100W in the liquid for 2h, the mixture was centrifugally filtered, and the filter cake

[0052] Repeatedly washing with deionized water to neutrality, and then drying in a vacuum oven at 60°C for 24 hours to obtain roughened graphene oxide for later use;

[0053] Step 2: Take 1.0 g of graphene oxide roughened in step 1 and place it in a planetary

[0054] In the ball mill, set the rotating speed to 250r / min, the ratio of ball feeding to 100:1, ball mill for 8 hours, and then

[0055] Stop the ball mill, pour 6.185g of silver acetate into the ball mill and mix it with graphene oxide again

[0056] Ball milling 2h, obtains the mixture of graphene oxide / silver acetate, standby;

[0057] Step 3: Put the graphene oxide / silver acetate mixture in step 2 in a muffle furnace, set the heating temperature to 300°C, and pass th...

Embodiment 3

[0060] Step 1: 1.5g graphene oxide is dissolved in 65% concentrated nitric acid in 50ml mass fraction

[0061] Ultrasonic dispersion with an ultrasonic power of 100W in the liquid for 3h, the mixture was centrifugally filtered, and the filter cake

[0062] Repeatedly washing with deionized water to neutrality, and then drying in a vacuum oven at 60°C for 28 hours to obtain roughened graphene oxide for future use;

[0063] Step 2: Take 1.0 g of graphene oxide roughened in step 1 and place it in a planetary

[0064] In the ball mill, set the rotating speed to 350r / min, the ball feeding ratio to 100:1, and ball mill for 13 hours.

[0065] After the ball milling was stopped, 6.185g of silver acetate was poured into the ball mill and mixed with graphene oxide.

[0066] Secondary ball milling 3h, obtains the mixture of graphene oxide / silver acetate, standby;

[0067] Step 3: Put the graphene oxide / silver acetate mixture in step 2 in a muffle furnace, set the heating temperature t...

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Abstract

The invention relates to a graphene surface modification method based on a dry method. The method comprises the following steps: S1, adding graphene oxide into a concentrated nitric acid solution, performing ultrasonic dispersion and filtration, repeatedly washing a filter cake with deionized water to be neutral to obtain the roughened graphene oxide; S2, putting the roughened graphene oxide in the S1 into a ball mill to be ball-milled, and then pouring silver acetate into the ball mill to be mixed with graphene oxide and ball-milling the mixture again to obtain a graphene oxide / silver acetate mixture; S3, putting the graphene oxide / silver acetate mixture into a muffle furnace to be heated and introducing a nitrogen atmosphere to obtain Ag particle-loading graphene oxide; and S4, adding the Ag particle-loading graphene oxide after ultrasonic treatment into hydrazine hydrate to be reduced to prepare Ag particles, the grain sizes of which are 30-100nm, and uniformly dispersing the Ag particles to the surface of graphene. The method provided by the invention is simple to operate, can produce on a large scale, and is free of heavy metal pollution.

Description

technical field [0001] The invention belongs to the field of graphene materials, in particular to a high-efficiency and green graphene surface modification technology. Background technique [0002] Composite materials are multi-phase materials prepared from two or more materials through a composite process. Various materials learn from each other in terms of performance and produce synergistic effects, so that the comprehensive performance of composite materials is better than that of the original constituent materials to meet various requirements. requirements. Composite materials consist of a matrix of continuous phases and phase reinforcement contained by the matrix. For the preparation of metal matrix composites, how to find a reinforcing phase with excellent performance and high bonding strength with the matrix is ​​the key to the preparation of high-performance metal matrix composites. [0003] Andre K. Geim of the University of Manchester in the United Kingdom prepa...

Claims

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Application Information

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IPC IPC(8): C01B32/198C01B32/194
CPCC01B2204/32C01P2002/70C01P2004/04C01P2004/80
Inventor 张柯柯霍福鹏王悔改张萌赵培峰姚怀祝要民
Owner HENAN UNIV OF SCI & TECH
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