Preparation method and application of magnetic hollow graphene-based composite microsphere material

A graphene-based, composite microsphere technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problems of difficult recovery and separation, low adsorption performance, poor dispersion, etc., and achieve good adsorption effect and increase Saturated adsorption capacity, good dispersion effect

Inactive Publication Date: 2017-02-08
CHONGQING UNIV OF ARTS & SCI
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Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a preparation method and application of a magnetic hollow graphene-based composite microsphere material, aiming at solving the problem of poor controllability and dispersion of the hollow structure graphene microsphere material currently produced. Poor performance, low adsorption performance of the product, difficult recovery and separation and other technical problems

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  • Preparation method and application of magnetic hollow graphene-based composite microsphere material
  • Preparation method and application of magnetic hollow graphene-based composite microsphere material
  • Preparation method and application of magnetic hollow graphene-based composite microsphere material

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Comparison scheme
Effect test

Embodiment 1

[0043] The magnetic hollow graphene-based composite microsphere material was prepared in the following manner, and the microsphere material was used for adsorption experiments.

[0044] 1. Preparation of graphene oxide

[0045] Adopt improved Hummers method to prepare graphene oxide, its technological process is as follows: assemble reactor in ice-water bath, add 1g expanded graphite powder and 2.5g sodium nitrate in reaction bottle under stirring condition, then add 150ml mass percent to be 95 % concentrated sulfuric acid, reacted in an ice-water bath for 30min; then, added 15g of potassium permanganate, controlled the reaction temperature not to exceed 20°C, and continued the reaction for 12h; ℃, heat preservation for 48h, the color of the solution changed from black to brownish yellow, and the crude product of graphene oxide was obtained. 50ml of hydrogen peroxide with a mass fraction of 35% was added dropwise to the above crude product to reduce the remaining oxidant, and...

Embodiment 2

[0055] The magnetic hollow graphene-based composite microsphere material was prepared in the following manner, and the microsphere material was used for adsorption experiments.

[0056] 1. Preparation of graphene oxide

[0057] Adopt the improved Hummers method to prepare graphene oxide, and its technological process is as follows: assemble reactor in ice-water bath, add 1g expanded graphite powder and 2.5g sodium nitrate in reaction bottle under stirring condition, add 150ml mass percentage again and be 98 % concentrated sulfuric acid, reacted in an ice-water bath for 60 minutes; then, added 15g of potassium permanganate, controlled the reaction temperature not to exceed 20°C, and continued the reaction for 24 hours; ℃, heat preservation for 48h, the color of the solution changed from black to brownish yellow, and the crude product of graphene oxide was obtained. 50ml of hydrogen peroxide with a mass fraction of 35% was added dropwise to the above crude product to reduce the...

Embodiment 3

[0067] The magnetic hollow graphene-based composite microsphere material was prepared in the following manner, and the microsphere material was used for adsorption experiments.

[0068] 1. Preparation of graphene oxide

[0069] Adopt the improved Hummers method to prepare graphene oxide, and its technological process is as follows: assemble reactor in ice-water bath, add 1g expanded graphite powder and 2.5g sodium nitrate in reaction bottle under stirring condition, add 150ml mass percentage again and be 98 % concentrated sulfuric acid, reacted in an ice-water bath for 60 minutes; then, added 15g of potassium permanganate, controlled the reaction temperature not to exceed 20°C, and continued the reaction for 36 hours; ℃, heat preservation for 48h, the color of the solution changed from black to brownish yellow, and the crude product of graphene oxide was obtained. 50ml of hydrogen peroxide with a mass fraction of 35% was added dropwise to the above crude product to reduce the...

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Abstract

The invention discloses a preparation method and application of a magnetic hollow graphene-based composite microsphere material. The preparation method comprises the following steps: taking a polymer microsphere with positive charges as a template, and obtaining the magnetic hollow graphene-based composite microsphere material through a high-temperature heat treatment one-step method. The preparation method provided by the invention is simple and feasible and has no environment pollution, and industrial production is easy to realize; meanwhile, the prepared magnetic hollow graphene-based composite microsphere material has a relatively large specific surface area and a developed pore structure, and can be used for efficiently and rapidly adsorbing and separating dye molecules. The magnetic hollow graphene-based composite microsphere material prepared by the preparation method has a wide application prospect in the aspect of treating dye wastewater.

Description

technical field [0001] The invention belongs to the technical field of new carbon materials, and in particular relates to a preparation method and application of a magnetic hollow graphene-based composite microsphere material. Background technique [0002] With the rapid development of industrial technology, organic synthetic dyes have been widely used in textile, printing and dyeing, papermaking, printing, food and cosmetics and other fields. At the same time, a large amount of dye wastewater is also produced. Dye wastewater has the characteristics of large discharge, high chroma, complex composition, high chemical oxygen demand (COD) value, and high toxicity. A large amount of dye wastewater discharge has caused serious water pollution and ecological damage. For this reason, how to effectively manage dye wastewater has aroused people's great attention. [0003] At present, the methods for treating dye wastewater mainly include chemical methods, biological methods, and ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
CPCB01J20/20B01J20/28009B01J20/28021C02F1/288C02F2101/308
Inventor 刘玉荣张进刘碧桃
Owner CHONGQING UNIV OF ARTS & SCI
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