Preparation method for small graphene

A graphene, small-scale technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of complex process, high cost, high toxicity, etc., and achieve the effect of simple process, easy operation, and large-scale reduction.
CN105502374AInactive Publication Date: 2016-04-20SHANXI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANXI UNIV
Publication Date
2016-04-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of graphene oxide, particularly relates to a method for preparing small graphene from aphanitic graphite, and mainly aims to solve the problems of low purity, high toxicity, complex process and high cost of an existing graphene oxide preparation method. The preparation method for the small graphene comprises the following steps of uniformly mixing purified aphanitic graphite, concentrated acid and a strong oxidizer, performing reaction in an airtight environment of 80 to 120 DEG C, slowly pouring a reaction mixture into excessive de-ionized water, performing uniform stirring, adding an aqueous solution of hydrogen peroxide until suspension is brown yellow or luminous yellow, performing acid washing and water washing until the pH value is 6 to 7, performing centrifugal separation to obtain small graphene oxide, extracting an aqueous solution of L-ascorbate according to the mass ratio of L-ascorbate to the small graphene oxide being 1:(0.1-100), and performing reaction for 1min to 5h at the temperature of 40 to 100 DEG C to obtain the graphene.
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Description

technical field

[0001] The invention belongs to the technical field of graphene oxide, in particular to a method for preparing small-sized graphene from aphanitic graphite. Background technique

[0002] Graphene is a new type of carbonaceous material with the thickness of a single layer of carbon atoms, which is arranged in a two-dimensional honeycomb lattice structure. Graphene is made of carbon atoms with sp 2 The monoatomic carbon layer formed by hybridization has a very stable structure and has excellent mechanical properties, peculiar electrical properties and good thermal properties. Studies have found that the Young's modulus of graphene can reach 11000GPa, the fracture strength can reach 125GPa, and the thermal conductivity The rate is up to 5000W / (m·K), and the theoretical specific surface area is up to 2630m 2 / g, and has the properties of perfect quantum tunneling effect, half-integer quantum Hall effect and never-disappearing conductivity, and has good applicat...

Claims

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