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Preparation method and application of graphene nano-materials and modified graphene nano-materials

A nanomaterial, graphene technology, applied in the direction of graphene, single-layer graphene, chemical instruments and methods, etc., can solve the problem that the effect of concrete modification and enhancement is not obvious, the specific surface area and monolayer rate of graphene are not high, and the layer Difficulty filling interfunctional groups, etc., to achieve the effect of large surface modifiability, high specific surface area, and improved strength

Inactive Publication Date: 2019-04-23
河北北方国能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the prior art, graphene is mostly graphite oxide or exfoliated graphite. Affected by factors such as equipment processing accuracy and environmental pollution, the specific surface area and single-layer ratio of the prepared graphene are not high, and the interlayer bonding force is weak. , and the defect that interlayer functional groups are difficult to fill, so the effect on concrete modification and reinforcement is not obvious

Method used

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  • Preparation method and application of graphene nano-materials and modified graphene nano-materials
  • Preparation method and application of graphene nano-materials and modified graphene nano-materials
  • Preparation method and application of graphene nano-materials and modified graphene nano-materials

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preparation example Construction

[0034] A preparation method of graphene nanomaterials, comprising the following steps:

[0035] 1) Catalyst promoter, magnesium oxide and deionized water complex reaction to obtain slurry, the slurry is spray granulated and dried and roasted to obtain a particle size of 10-100 μm and a specific surface area of ​​50-200m 2 / g of magnesium oxide carrier rich in active substances.

[0036] In the present invention, the catalytic promoter is any oxide or salt of metal copper, chromium, ruthenium, nickel, aluminum, palladium, zinc, and the type of salt includes chloride salt, nitrate, sulfate, hydroxide salt, etc. . As preferably, the catalyst promoter includes copper oxide, dichromium oxide, ruthenium oxide, nickel oxide, aluminum oxide, palladium oxide, zinc oxide, copper chloride, copper sulfate, copper hydroxide, chromium chloride, chromium nitrate, Ruthenium nitrate, nickel sulfate, nickel chloride, aluminum nitrate, aluminum hydroxide, palladium chloride, zinc chloride, zin...

Embodiment 1

[0061] The preparation method of the graphene nanomaterial of the present embodiment comprises the following steps:

[0062] 1) Put copper sulfate and nickel chloride at a mass ratio of 1:2, and magnesium oxide at a mass ratio of 1:80, and put them into a stirred reactor filled with deionized water, with a solid-to-liquid mass ratio of 1:20. Raise the temperature to 90°C, and conduct constant temperature complexation reaction for 5 hours to obtain a slurry, which is subjected to spray granulation, drying and roasting to obtain a particle size of 30-50 μm and a specific surface area of ​​140-160m 2 / g of magnesium oxide carrier rich in active substances;

[0063] 2) After the above-mentioned magnesia carrier rich in active substances is heated to 600°C under an inert gas atmosphere, the multi-carbon cracking gas containing methane, ethane, propane and n-butane is passed through, and the chemical vapor deposition (CVD) reaction is carried out for 1.5h , to obtain graphene nanom...

Embodiment 2

[0066] The preparation method of the graphene nanomaterial of the present embodiment comprises the following steps:

[0067] 1) Zinc oxide, ruthenium nitrate and magnesium oxide are put into a stirred reactor filled with deionized water at a mass ratio of 0.5:0.5:65. The solid-liquid mass ratio is 1:15. Combined reaction for 6h to obtain a slurry, the slurry is spray granulated and dried and roasted to obtain a particle size of 80-100μm and a specific surface area of ​​80-100m 2 / g of magnesium oxide carrier rich in active substances;

[0068] 2) After the above-mentioned magnesium oxide carrier rich in active substances is heated to 900°C under an inert gas atmosphere, the multi-carbon cracking gas containing methane, ethane, propane, propylene and n-butene is passed through to carry out chemical vapor deposition (CVD) reaction 3h, to obtain graphene nanomaterials.

[0069] Tested by methods such as BET, SEM and TEM, the specific surface area of ​​the graphene nano material...

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Abstract

An embodiment of the invention discloses a preparation method and an application of graphene nano-materials and modified graphene nano-materials, and belongs to the technical field of graphene nano-materials. The preparation method of the graphene nano-materials includes the following steps: 1) a slurry is obtained by the complexation reaction of catalytic agent, magnesium oxide and deionized water, and a magnesium oxide carrier rich in active substances is obtained by spray granulation and dry roasting of the slurry; 2) the magnesium oxide carrier rich in active substances is heated to 600 to900 DEG C in an inert gas atmosphere, a mult-carbon pyrolysis gas is introduced, and the graphene nano-materials is obtained by the chemical vapor deposition reaction. The modified graphene nano-materials prepared by the hydrothermal reaction of graphene nano-materials with high monolayer rate and high specific surface area and silicate is added to concrete, which significantly improves the strength, toughness, water resistance and other properties of concrete, and accordingly has broad development prospect.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of graphene nanomaterials, in particular to a preparation method and application of graphene nanomaterials and modified graphene nanomaterials. Background technique [0002] With the in-depth development of social industrialization, ordinary concrete is one of the most widely used and most important traditional building materials, and its output and consumption are constantly increasing. Ordinary concrete is a kind of artificial stone made by mixing cement, coarse aggregate (crushed stone or pebble), fine aggregate (sand), admixture and water, and hardened. Among them, sand and stone form the skeleton in the concrete Function, inhibit the shrinkage of cement, cement and water form cement slurry, and fill the gap between aggregates. Due to the excessive rigidity, insufficient flexibility and easy cracking of ordinary concrete, its application in many fields is limited, so high-perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/186C04B14/02C04B20/02
CPCC01B32/186C01B2204/02C01B2204/32C04B14/024C04B20/023
Inventor 董前程张朋曾云孙久铭
Owner 河北北方国能科技有限公司
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