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Water-soluble reduced graphene and its preparation method and application

A graphene, water-soluble technology, applied in the field of water-soluble reduced graphene and its preparation, can solve problems such as toxicity and environmental pollution, and achieve the effect of being suitable for mass production and high reduction efficiency

Active Publication Date: 2020-07-24
中润超油(北京)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods require the use of various chemical reagents and multi-step complex reactions to prepare water-soluble reduced graphene in order to prevent graphene from coagulating, and the reagents used, such as hydrazine hydrate, Coomassie brilliant blue, and dihydroxybenzaldehyde, have certain toxicity. easy to cause environmental pollution

Method used

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  • Water-soluble reduced graphene and its preparation method and application
  • Water-soluble reduced graphene and its preparation method and application
  • Water-soluble reduced graphene and its preparation method and application

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preparation example Construction

[0029] The embodiment of the present invention provides a kind of preparation method of water-soluble reduced graphene, comprises the following steps:

[0030] S100, provide graphene oxide, and disperse graphene oxide in water to make graphene oxide dispersion liquid, the concentration of graphene oxide dispersion liquid is less than or equal to 2g / L, and the mass fraction of oxygen element in graphene oxide is 25% to 45% %;

[0031] S200, adding thiohydrogen salt with a cation of +1 valence to the graphene oxide dispersion liquid to carry out reduction reaction, the mass ratio of the added thiohydrogen salt to the graphene oxide is (0.5-20):1.

[0032] Due to the hydrophobicity of graphene, graphene obtained by chemical reduction will precipitate into irreversible aggregates without the use of stabilizing polymers or surfactants, making reduced graphene oxide insoluble in water. However, the preparation method of water-soluble reduced graphene provided by the present inventi...

Embodiment 1

[0048] Add 0.1g graphene oxide (35% oxygen element mass fraction) and 100mL deionized water into a 250mL beaker, ultrasonically disperse to obtain a graphene oxide dispersion with a concentration of 1g / L, add 0.2g NaHS at room temperature, and continue stirring for 1h , to obtain an aqueous solution of reduced graphene.

Embodiment 2

[0050] The preparation method is basically the same as in Example 1, except that the amount of NaHS added is 0.5 g.

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Abstract

The invention relates to a preparation method of water-soluble reduced graphene. The preparation method comprises the following steps: graphene oxide is provided and dispersed in water, and graphene oxide dispersion liquid is prepared, wherein the concentration of the graphene oxide dispersion liquid is smaller than or equal to 2 g / L, and the mass fraction of the oxygen element in the graphene oxide is 25%-45%; and sulfhydrate with positive ions in the +1 valence is added into the graphene oxide dispersion liquid for a reduction reaction, wherein the mass ratio of the added sulfhydrate to thegraphene oxide is (0.5 to 20):1.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to a water-soluble reduced graphene and its preparation method and application. Background technique [0002] Graphene is composed of a single layer of carbon atoms, and the carbon atoms are sp 2 The hybrid orbitals form a planar structure of hexagonal honeycomb lattice, which is a new type of two-dimensional carbonaceous nanomaterial with only one atomic layer thickness. Due to its special structure and extremely high mechanical strength, graphene exhibits electrical conductivity, thermal conductivity, and antibacterial properties. These superior properties make graphene show broad application prospects in the fields of electronics, information, energy, materials, and biomedicine. . [0003] Due to low cost and suitable for batch preparation, the reduction of graphene oxide to prepare graphene has become one of the most commonly used methods. At present, there are more than 50 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184H01M4/587H01M10/052
CPCC01B32/184C01B2204/22C01B2204/32H01M4/587H01M10/052Y02E60/10
Inventor 郭建强朱巧思李岳梁佳丰李炯利王旭东
Owner 中润超油(北京)新材料有限公司