A method for modifying graphite oxide to improve its ability to adsorb acid dyes

A technology of acid dyes and graphite, applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve problems such as poor adsorption performance, limitations of graphite oxide, and restrictions on the application of graphite oxide, achieving magnetic, Improves adsorption performance and facilitates recycling

Inactive Publication Date: 2015-08-19
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] However, graphite oxide is currently limited by its own properties in the treatment of dye wastewater.
This is because graphite oxide is negatively charged on its surface because of its rich acidic functional groups such as carboxyl and hydroxyl groups, and its isoelectric point is about 4. Therefore, graphite oxide can only adsorb positively charged basic dyes. , and the poor adsorption performance of negatively charged acid dyes, which seriously restricts the application of graphite oxide in the field of dye wastewater treatment

Method used

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  • A method for modifying graphite oxide to improve its ability to adsorb acid dyes
  • A method for modifying graphite oxide to improve its ability to adsorb acid dyes
  • A method for modifying graphite oxide to improve its ability to adsorb acid dyes

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Effect test

Embodiment 1

[0019] Graphite oxide (GO) was prepared by Tongshi's improved Hummer method using graphite as raw material.

[0020] 0.1g nano-Fe 3 o 4 Evenly dispersed in 80 ml ethanol, 20 ml water and 1 ml ammonia water, then added 0.03 g TEOS, stirred at room temperature for 6 hours. The resulting solid product was evenly dispersed in a mixed solution of 0.3g CTAB, 80ml deionized water, 1.5ml ammonia water and 60ml ethanol, and after stirring for 30min, 3.05g ZrOCl was added 2 , after the completion, the resulting solid product was refluxed with acetone for 48h, and after drying, Fe 3 o 4 -ZrO 2 .

[0021] Mix 0.1 g GO with 0.1 g Fe 3 o 4 -ZrO 2 Mix and disperse evenly in a mixed solution composed of 15mL ethanol and 60mL deionized water, ultrasonically disperse for 30 min, add 5 ml ethylenediamine, transfer to an autoclave, react at 180°C for 15 h, cool to room temperature, and use The solid product is separated by the magnet, and the product is obtained after drying at 70°C.

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Embodiment 2

[0024] Graphite oxide (GO) was prepared by Tongshi's improved Hummer method using graphite as raw material.

[0025] 0.1g nano-Fe 3 o 4 Evenly dispersed in 80 ml ethanol, 20 ml water and 1 ml ammonia water, then added 0.03 g TEOS, stirred at room temperature for 6 hours. The resulting solid product was evenly dispersed in a mixed solution of 0.3g CTAB, 80ml deionized water, 1.5ml ammonia water and 60ml ethanol, and after stirring for 30min, 3.05g ZrOCl was added 2 , after the completion, the resulting solid product was refluxed with acetone for 48h, and after drying, Fe 3 o 4 -ZrO 2 .

[0026] Mix 0.1 g GO with 0.1 g Fe 3 o 4 -ZrO 2 Mix and disperse evenly in a mixed solution composed of 15mL ethanol and 60mL deionized water, ultrasonically disperse for 45 min, add 5 ml ethylenediamine, transfer to a high-pressure reactor, react at 180°C for 15 h, cool to room temperature, and use The solid product is separated by the magnet, and the product is obtained after drying a...

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Abstract

The invention provides a method for improving an acid dye adsorption performance of graphite oxide by transforming graphite oxide. The method is characterized by comprising the steps of mixing the graphite oxide with Fe3O4-ZrO2 according to a mass ratio of 1:1 to obtain a the mixture, carrying out ultrasonic uniform dispersing, adding ethidene diamine equal to 6.7% of the mixture in total volume to obtain a the mixture I, transferring the mixture I into a high-pressure reaction kettle, reacting for 15 hours at 180 DEG C, cooling to the room temperature, separating solid products out by virtue of a magnet, and drying the solid products at 70 DEG C, so as to obtain a product. According to the method, the adsorption capacity of the graphite oxide to electronegative acid dyes is enhanced, and the application of the graphite oxide in the field of dye wastewater treatment is expanded.

Description

technical field [0001] The invention relates to a modification method of graphite oxide, in particular to a method for modifying graphite oxide to improve its ability to adsorb acid dyes. Background technique [0002] Graphite oxide is an important derivative of graphite, which can be obtained from graphite through simple processing with low cost. It is a multi-layer material with rich functional groups on the surface, such as hydroxyl, epoxy, carboxyl, etc. It has the advantages of large specific surface area and strong ion exchange capacity. Broadening the application field of graphite oxide is very important for making full use of my country's rich Graphite mineral resources are of great significance to increase the added value of graphite products, and the research on the modification of graphite oxide has become a current hot spot. [0003] The main applications of graphite oxide include: efficient organic reaction catalysts, pollutant degradation materials, pollutant a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F103/30
Inventor 陈萍华蒋华麟罗胜联秦元成
Owner NANCHANG HANGKONG UNIVERSITY
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