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Method for preparing functionalized graphene oxide

A graphene and functionalization technology, applied in organic chemistry, etc., can solve the problem of graphene oxide dispersion not being well resolved, limited application, etc., and achieve low pollution, high utilization rate and simple operation method Effect

Inactive Publication Date: 2012-10-24
南京南工维明新材料科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the dispersion of graphene oxide in organic solvents is still not well resolved, which greatly limits the application of graphene and polymer composites.

Method used

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  • Method for preparing functionalized graphene oxide
  • Method for preparing functionalized graphene oxide
  • Method for preparing functionalized graphene oxide

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preparation example Construction

[0023] The present invention proposes a novel method for preparing functionalized graphene oxide, which is a graphene oxide functionalization process catalyzed by polyphosphoric acid at room temperature; specifically includes: dispersing graphite oxide into water or an organic solvent, and ultrasonicating for 30-60 minutes , add o-hydroxyaniline or o-phenylenediamine and stir evenly, then add polyphosphoric acid to catalyze, stir at room temperature for 5-7 days, filter with suction, wash the filter cake with dilute hydrochloric acid and water successively, and dry in vacuum to obtain functionalized graphene oxide material. The material can be dissolved in commonly used organic solvents, such as o-hydroxyaniline functionalized graphene oxide can be dissolved in acetonitrile, acetone, N-methylpyrrolidone and N,N-dimethylformamide, o-phenylenediamine functionalized The graphene oxide can be dissolved in tetrahydrofuran, N-methylpyrrolidone and N,N-dimethylformamide.

[0024] Th...

Embodiment

[0029] Embodiment: the preparation method of functionalized graphene oxide.

[0030] Disperse graphite oxide powder (160 mg) into organic solvents such as water or tetrahydrofuran (80 ml), and undergo ultrasonic treatment for 30-60 minutes to obtain a dispersed solution of graphene oxide; then add 700 mg of o-hydroxyaniline or o-phenylenediamine Add to the above solution, stir and sonicate for 5-10 minutes, add 1 ml of polyphosphoric acid under vigorous stirring; stir at room temperature for 5-7 days, filter to remove the filtrate, redisperse the filter cake into dilute hydrochloric acid solution and wash for 3-6 times, the solid was washed with deionized water, and finally vacuum-dried for 1-2 days to obtain functionalized graphene oxide.

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Abstract

The invention relates to a method for preparing functionalized graphene oxide. The method is characterized in that the functionalized graphene oxide material having a soluble organic phase is prepared by reacting a graphene oxide water solution with an ortho-hydroxylaniline or ortho-phenylenediamine solution under the condition that polyphosphoric acid is used as a catalyst. The method for preparing functionalized graphene oxide has the following characteristics: (1) the group selectivity is high, and carboxyl functional groups on the graphene oxide lamella can be selectively utilized; (2) the product has good solubility and can be dissolved in common organic solvents; and (3) the advantages of simple operation method, low cost and the like are achieved. The technology well compensates for limitations of the traditional method for preparing the functionalized graphene oxide material, develops the functionalization path of the material, is expected to become the important step in chemical industry production of graphene-based materials, and has great potential applications in graphene-based composite materials, graphene-based photoelectric materials and organic photoelectric functional devices.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer materials, specifically using polyphosphoric acid as a catalyst at room temperature to prepare organic phase-soluble functionalized graphite oxide by reacting an aqueous solution of graphene oxide with a solution of o-hydroxyaniline or o-phenylenediamine vinyl material. It has huge potential application value in graphene-based composite materials, graphene-based photoelectric materials and organic photoelectric functional devices. Background technique [0002] Graphene and its derivatives are expected to become the best materials for building a new generation of nanoelectronic devices and a new generation of polymer additives due to their excellent physical properties and abundant sources of graphite precursors. However, due to the hydrophobic nature of graphene, it has only a small dispersion in solvents, which greatly limits its applications. The most effective way to solve this problem...

Claims

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Application Information

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IPC IPC(8): C07D235/04C07D263/54
Inventor 解令海黄维艾伟杜祝祝赵飞
Owner 南京南工维明新材料科技有限公司
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