A kind of preparation method and application of graphene oxide

A graphene and pre-oxidation technology, applied in chemical instruments and methods, anaerobic digestion treatment, carbon compounds, etc., can solve the problems of complex graphene oxide process, complex temperature control, and high cost of graphene oxide, and prevent bacterial cells. drain, prolong response time, enhance the effect of bioaugmentation

Active Publication Date: 2022-03-15
青岛绿洁坤环保科技有限公司
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Problems solved by technology

There are many existing methods for preparing graphene oxide. The commonly used Hummers method for preparing graphene oxide is complex and requires complex temperature control. The cost of producing graphene oxide is relatively high, and it is not suitable for sewage treatment.

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  • A kind of preparation method and application of graphene oxide

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Embodiment

[0018] The concrete process that the embodiment of the present invention prepares graphene oxide is as follows:

[0019] (1) Pre-oxidation: get 5 grams of high-grade pure graphite powder and add it to a beaker with 500 milliliters of concentrated sulfuric acid with a mass concentration of 98%, and mechanically stir for 24 hours to obtain a mixed solution A;

[0020] (2) Oxidation: Move the beaker containing the mixed solution A to an ice-water bath below 4°C, then slowly add 25 grams of potassium permanganate (KMnO4) into the beaker, stir mechanically for 24 hours, remove the ice-water bath, and place at room temperature After slowly adding 500 ml of deionized water, stir mechanically for 24 hours to obtain mixed solution B; then slowly add saturated hydrogen peroxide solution into mixed solution B until the color of the mixed solution turns golden yellow and there is no color change within 1 minute Stir for 5h;

[0021] (3) Washing and precipitation: Fill the beaker with wat...

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Abstract

The invention belongs to the technical field of sewage treatment, and relates to a preparation method and application of graphene oxide. First, graphite powder is added to a beaker containing concentrated sulfuric acid for pre-oxidation; then potassium permanganate is added to the beaker in an ice-water bath and stirred, After removing the ice-water bath, add deionized water at room temperature for stirring; then add saturated hydrogen peroxide solution slowly until the color of the mixture turns golden yellow and then stir; finally, wash the mixture, centrifuge, dialysis and freeze-drying in sequence. The brown-yellow flocculent graphene oxide is prepared. The whole preparation process does not require complicated temperature control, the operation is simple, and there is no high-temperature production stage, the production safety factor is improved, and the production cost is reduced. It has good strengthening performance for anammox bacteria, is suitable for industrial production, and has good economic and environmental benefits.

Description

Technical field: [0001] The invention belongs to the technical field of sewage treatment, and relates to a preparation method and application of graphene oxide. The prepared graphene oxide is used to strengthen the anaerobic ammonium oxidation denitrification process. Background technique: [0002] In recent years, the use of anaerobic ammonium oxidation method to treat ammonia-nitrogen-containing wastewater has been increasingly recognized as an effective method. In this process, anammox bacteria use nitrite as electron acceptor to oxidize ammonia nitrogen into nitrogen gas. Compared with the traditional denitrification system, the anaerobic ammonium oxidation system has the advantages of less oxygen demand, no need for external organic carbon source, and less residual sludge generated, which greatly reduces the operating cost. However, due to the following four characteristics of anammox bacteria, it is very difficult to maintain a sufficient amount of anammox sludge in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/198C02F3/28
Inventor 陈光辉于德爽王妍妍张培玉王晓霞苗圆圆谢文霞
Owner 青岛绿洁坤环保科技有限公司
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