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Low-cost carbon graphene sheet and preparation method thereof

A graphene sheet, low-cost technology, applied in the field of low-cost carbon graphene sheet and its preparation, can solve the problems that hinder the popularization and application of graphene sheet, high cost of graphene sheet preparation, difficulty in large-scale preparation of graphene sheet, etc. , to achieve the effect of easy large-scale production, abundant raw materials and low price

Inactive Publication Date: 2014-01-29
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of graphene sheets by the above method generally has problems such as high preparation cost, complicated process, and environmental pollution, and it is difficult to prepare a large number of graphene sheets, which greatly hinders the promotion and application of graphene sheets.

Method used

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  • Low-cost carbon graphene sheet and preparation method thereof
  • Low-cost carbon graphene sheet and preparation method thereof
  • Low-cost carbon graphene sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh anthracite and alumina at a ratio of 100:50 (mass ratio), grind to 600 mesh, put it into a crucible, cover it and move it into a vacuum furnace, and evacuate until the vacuum degree reaches 1.0×10 2 Pa, then raise the temperature at 20°C / min to 2000°C, keep it warm for 2h, cool to room temperature, and take out the charred product. Put the vacuum carbonized product in hydrochloric acid with a pH value of 1 (the mass ratio of carbonized product to hydrochloric acid is 1:2), stir for 1 h (stirring speed 500 rpm), and then wash it fully with deionized water after separation by filtration until there is no Cl － It was detected that the graphene sheets were obtained by placing them in an oven at 110°C for 5 hours, and then putting them into a ball mill for 10 hours of ball milling (ball milling speed 1000 rpm). The prepared graphene sheet has the following properties: yield 62.4%, number of layers 2-6, carbon content 98.5%, specific surface area 346m 2 / g.

Embodiment 2

[0050] Weigh the petroleum coke and tin powder according to 100:10 (mass ratio), grind to 200 mesh, put it into the crucible, cover the lid and move it into the vacuum furnace, and evacuate until the vacuum degree reaches 1.0×10 1 Pa, then raise the temperature to 2400°C at 10°C / min, keep it warm for 1h, cool down to room temperature, and take out the charred product. Put the vacuum carbonized product in hydrochloric acid with a pH value of 3 (the mass ratio of carbonized product to hydrochloric acid is 1:3), stir for 5 hours (stirring speed 100 rpm), and after filtration and separation, fully wash with deionized water until there is no Cl － It was detected that the graphene sheets were obtained by placing them in an oven at 150°C for 2 hours, and then putting them into a ball mill for 6 hours of ball milling (ball milling speed 500 rpm). The prepared graphene sheet has the following properties: 40% yield, 5-10 layers, 98.0% carbon content, and 128m2 specific surface area 2 ...

Embodiment 3

[0052] Weigh flake graphite powder and magnesium powder according to 100:20 (mass ratio), grind them to 60 mesh, put them into a crucible, cover them and move them into a vacuum furnace, and evacuate until the vacuum degree reaches 1.0×10 -1 Pa, then raise the temperature at 30°C / min to 1800°C, keep it warm for 5h, cool to room temperature, and take out the charred product. Put the vacuum carbonized product in hydrochloric acid with a pH value of 5 (mass ratio of carbonized product to hydrochloric acid 1:5), stir for 4 hours (stirring speed 50 rpm), and wash with deionized water after separation by filtration until there is no Cl － It was detected that the graphene sheets were obtained by placing them in an oven at 200°C for 1 h, and then putting them into a ball mill for 4 h (ball milling speed 700 rpm). The prepared graphene sheet has the following properties: yield 76.2%, number of layers 5-10, carbon content 99.0%, specific surface area 205m 2 / g.

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Abstract

The invention discloses a low-cost carbon graphene sheet and a preparation method thereof. The preparation method comprises the following steps of: mixing a carbon material (coal, coke, resin carbon, graphite, bamboo charcoal or active carbon) as a raw material and an additive; then preparing the graphene sheet through processes, namely vacuum carbonization, pickling, ball milling, and the like, at low cost. The graphene sheet prepared through the preparation method disclosed by the invention has the advantages of less structural defect, low preparation cost, easiness for operation, greenness, environmental protection, easiness for industrialization and outstanding economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a low-cost carbon graphene sheet and a preparation method thereof. Background technique [0002] In 2004, Geim et al. from the University of Manchester in the United Kingdom prepared and observed single-layer graphene for the first time using a simple method of sticking tape on a piece of graphite and then tearing it off. Started the research boom of graphene sheets. A graphene sheet is a pure carbon atomic structure with only a single layer or a few layers of atomic thickness, and its C-C bonds are sp 2 combined to form a dense honeycomb lattice structure. Because of its unique two-dimensional carbon nanostructure and excellent physical properties, it has aroused widespread interest in the fields of physics, materials science, and condensed matter physics. At present, graphene sheet-based materials have a wide range of industrial applications, such as lit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 林起浪雷梅英
Owner FUZHOU UNIV
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