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High-quality graphene and method of producing same via microwave reduction of graphene oxide

A technology of oxidized stone and graphene, which is applied in the direction of graphene, single-layer graphene, chemical instruments and methods, etc., can solve the problem that oxygen functional groups cannot be completely removed

Pending Publication Date: 2019-09-13
RUTGERS THE STATE UNIV
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  • Application Information

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Problems solved by technology

The oxidation of graphite and its subsequent exfoliation into single-layer graphene oxide with large lateral dimensions has an exfoliation yield of approximately 100%, but despite extensive efforts, the oxygen functional groups cannot be completely removed such that the reduced form of graphene oxide (rGO) remains a highly disordered material with properties typically much lower than chemical vapor deposited (CVD) graphene

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  • High-quality graphene and method of producing same via microwave reduction of graphene oxide
  • High-quality graphene and method of producing same via microwave reduction of graphene oxide
  • High-quality graphene and method of producing same via microwave reduction of graphene oxide

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[0073] In the following examples, sulfuric acid, potassium permanganate, sodium nitrate, nickel nitrate, and ferric nitrate were purchased from Sigma Aldrich and used as received. SiO 2 / Si wafer (300nm thick SiO on highly doped p-type Si(100) 2 layers) were purchased from Nova Electronic Materials. Ultra-high purity argon was purchased from Airgas.

[0074] In this exemplary embodiment of the invention, graphene oxide (GO) was prepared by oxidizing graphite and dissolving it in water into single-layer graphene oxide flakes using a modified Hemmers method. GO was prepared from natural graphite by a modified Hemmers method. Graphite powder (1.5 g) was immersed in cold concentrated H with sodium nitrate (1.14 g) 2 SO 4 (50.7 mL). Slowly add KMnO 4 (6 g) while stirring for 2 hours. After 3 days, slowly add 5% H 2 SO 4 solution (150 mL), and finally by adding 30% H 2 o 2 (4.5 mL) to terminate the reaction, after which the color of the solution changed to bright yellow....

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Abstract

Disclosed are a method of producing microwave-reduced graphene oxide (MW-rGO), by providing graphene oxide; reducing the graphene oxide to obtain reduced graphene oxide (rGO) wherein the reduction ofoxygen concentration is sufficient to allow microwaves to be absorbed by the rGO; and microwaving the reduced graphene oxide until microwave-reduced graphene oxide (MW-rGO) containing an oxygen concentration of 5 atomic% or less is produced. The method is a quick and efficient method to produce high quality graphene.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to US Provisional Patent Application No. 62 / 382,028, filed August 31, 2016, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates generally to the field of graphene production, and more particularly to methods of producing high-quality graphene. Background technique [0004] Graphene is a planar monolayer of carbon atoms tightly packed into a two-dimensional (2D) honeycomb lattice and is the basic structural unit of all other dimensional graphitic materials. It can be packed into 0D fullerenes, rolled into 1D nanotubes or stacked into 3D graphite. Due to its excellent electronic, thermal and mechanical properties, as well as its large surface area and low mass, graphene has great potential for a wide range of applications. Except for ultrafast electronics, most of the proposed applications req...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/198C01B32/19
CPCC01B32/22C01B32/225C01B32/23C01B32/192C01B32/198C01B2204/02C01B2204/22C01P2002/82C01P2002/85C01P2004/03C01P2006/40
Inventor 玛尼许·寇沃拉戴米恩·佛伊里梁智恩雅各·卡普弗伯格
Owner RUTGERS THE STATE UNIV