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Preparation method for sulfonated oxidized graphite

A technology of sulfonation oxidation and graphite, which is applied in the field of graphite, can solve problems such as the complexity of the sulfonation process, and achieve the effects of easy operation, easy preparation, and simple method

Inactive Publication Date: 2015-05-06
QINGDAO TAIHAODA CARBON MATERIAL
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Problems solved by technology

[0004] In recent years, scholars at home and abroad have conducted a lot of research on the functionalization of graphene surface, so that graphene has high conductivity, high dispersion and high solubility. Sulfonation treatment can not only improve its dispersibility, but also retain its original properties, but the existing technology, the sulfonation treatment process is complicated

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Embodiment

[0013] The preparation method of the sulfonated graphite oxide in this example includes the following steps: (1) Put the graphite oxide in a vacuum oven, evacuate to a pressure of less than 1 Pa, and keep it at a temperature of 190°C for 5 hours to obtain a pre-reduced Graphite oxide; (2) Add p-aminobenzenesulfonic acid crystals to 2% sodium hydroxide solution, dissolve it in a hot water bath, and then cool to room temperature; (3) Add sodium nitrite, dissolve , drop the mixture solution into a beaker filled with ice water and concentrated hydrochloric acid under stirring, keep the temperature below 5°C, when there is a fine-grained white precipitate of p-aminobenzenesulfonic acid diazonium salt, continue to stir the reaction 15 min, to obtain the diazonium salt of sulfanil; (4) Add the diazonium salt of sulfanil into the suspension of pre-reduced graphite oxide in batches, stir for 4 h in ice bath, and wash with deionized water until Neutral, finally get sulfonated graphite o...

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Abstract

A disclosed preparation method for sulfonated oxidized graphite comprises: vacuumizing oxidized graphite to have a pressure less than 1 Pa, and keeping oxidized graphite under the temperature condition of 190 DEG C for 5 h, so as to obtain pre-reduced graphite; adding sulfanilic acid crystal into a sodium hydroxide solution with the concentration of 2%, dissolving and cooling to room temperature; adding sodium nitrite, dropwise adding the mixture solution into a beaker containing ice water and concentrated hydrochloric acid with stirring, controlling the temperature to be 5 DEG C or less, continuing to react with stirring for 15 min when a fine-granular white precipitate of sulfanilic acid diazo salt appears, so as to obtain sulfanilic acid diazo salt; adding sulfanilic acid diazo salt into a suspension of the pre-reduced oxidized graphite in batches, stirring under the condition of ice bath for 4 h, washing with deionized water to be neutral to finally obtain sulfonated oxidized graphite, and fully drying in a vacuum baking oven at a temperature of 60 DEG C, so as to the product. The method is simple and easy to operate, and graphene can be relatively well prepared after graphite is subjected to sulfonation processing.

Description

[0001] technical field [0002] The invention belongs to the technical field of graphite, and in particular relates to a preparation method of sulfonated graphite oxide. [0003] Background technique [0004] In recent years, scholars at home and abroad have conducted a lot of research on the functionalization of graphene surface, so that graphene has high conductivity, high dispersion and high solubility. Carrying out sulfonation treatment can not only improve its dispersibility, but also retain its original properties, but in the prior art, the sulfonation treatment process is complicated. [0005] Contents of the invention [0006] In order to overcome the above-mentioned technical problems in the prior art, the object of the present invention is to provide a method for preparing sulfonated graphite oxide, and the sulfonation process is simple. [0007] The preparation method of sulfonated graphite oxide provided by the present invention comprises the following steps...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 乔帅
Owner QINGDAO TAIHAODA CARBON MATERIAL
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