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Preparation method and application of graphene oxide

A graphene and pre-oxidation technology, applied in chemical instruments and methods, anaerobic digestion, inorganic chemistry, etc., can solve problems such as complex temperature control, high cost of graphene oxide, complex graphene oxide process, etc., to achieve prolonged reaction Time, easy operation, good economic and environmental benefits

Active Publication Date: 2019-05-03
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.

Method used

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  • Preparation method and application of graphene oxide
  • 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. The preparation method of graphene oxide comprises the steps:adding graphite powder to a beaker containing concentrated sulfuric acid for pre-oxidation firstly, then adding potassium permanganate to the beaker in an ice water bath, performing stirring, removingthe ice water bath, adding deionized water at room temperature, performing stirring, then adding a saturated hydrogen peroxide solution slowly until the color of the mixed liquid turns golden yellow,and performing stirring; and finally, performing washing and precipitation on the obtained mixed liquid, and performing centrifugation, dialysis and freeze drying so as to obtain the brown-yellow floc graphene oxide. The whole preparation process does not need complicated temperature control, and has easy operation and no high-temperature production stages, the production safety factor is improved, meanwhile, more energy saving is achieved, and the production cost is reduced; and the produced graphene oxide powder has good strengthening performance for anammox bacteria, and is suitable for industrial production, and good economic and environmental benefits can be achieved.

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 Applications(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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