A method for preparing multilayer graphene with blue carbon
A technology of multi-layer graphene and semi-carbon, which is applied in the direction of graphene, chemical instruments and methods, and nano-carbon. Chemical performance and other issues, to achieve the effect of low price, easy operation and fast reaction speed
Inactive Publication Date: 2019-01-29
新疆出入境检验检疫局
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Problems solved by technology
Among them, the micromechanical exfoliation method and the thermal expansion graphite method have low efficiency and small output, which can only be limited to small-scale experiments in the laboratory; although the graphite oxide reduction method can be prepared in large quantities, the oxidation-reduction process introduces a large number of defects, which seriously affects its physical and chemical properties. , especially the electrical conductivity; the vapor phase chemical deposition process is complex, the preparation conditions are harsh, and it is not suitable for mass production
Therefore, it is still difficult to obtain large quantities of graphene products at low cost
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Embodiment Construction
[0019] The present invention will be further illustrated by specific embodiments below.
[0020] After grinding and mixing 1.0 g of blue charcoal and 2.0 g of potassium hydroxide evenly, put them into a small crucible, and then put the small crucible into a large crucible containing graphite powder, and then put it in a microwave oven.
[0021] Use a 900-watt microwave oven to heat the reaction for 30 minutes. The crucible and raw materials are quickly heated by the graphite powder absorbing microwaves. After the reaction, the temperature is naturally cooled to room temperature, and the product is collected in the crucible.
[0022] Use multiple deionized water washes to remove soluble inorganic salts from the product, and then use 1M hydrochloric acid and 0.5M hydrofluoric acid to remove insoluble inorganic salt impurities.
[0023] Under the above conditions, the yield of multilayer graphene is 0.5 g. figure 1 Schematic diagram of microwave reactor; Raman spectrum (see figure 2 ) Sh...
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Abstract
The invention discloses a method for preparing multilayer graphene by using semi coke as the raw material and directly heating through microwaves. In the preparation method, the semi coke is mixed with alkali and the multilayer graphene is massively and rapidly prepared in a microwave rapid heating manner; in the preparing process, the semi coke is subjected to high-temperature pyrolysis under the action of strong alkali to obtain the multilayer graphene and subsequently, impurities are removed by water washing and acid washing. The method has the effects and the advantages as follows: the prepared multilayer graphene is relatively high in yield and content and can be applied to various fields such as the anode material of a lithium ion battery, an adsorption material, a catalyst carrier and the like; meanwhile, the characteristics of low price and easiness for obtaining the raw material, simple process, excellent product performance and the like are achieved and the method is suitable for large-scale production of the multilayer graphene.
Description
Technical field [0001] The invention belongs to the technical field of carbon material preparation, and relates to a method for preparing multi-layer graphene from blue carbon. Background technique [0002] Graphene is a new type of carbon material with two-dimensional structure. 2 The carbon atoms are arranged closely to form a honeycomb structure. Graphene is the thinnest and strongest material currently known and has excellent electrical and thermal conductivity and optical properties. These excellent properties of graphene make it have potential application prospects in many fields and become a hot spot in recent materials research. [0003] The research and application of graphene put forward urgent requirements for its preparation method. At present, the preparation methods of graphene mainly include micromechanical exfoliation method, thermal expansion graphite method, graphite oxide reduction method and vapor phase chemical deposition method. Among them, the micromechani...
Claims
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IPC IPC(8): C01B32/19C01B32/196C01B32/184
Inventor 刘俊杨忠
Owner 新疆出入境检验检疫局