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Modified three-dimensional graphene composite material, and preparation method and application thereof

A composite material and graphene technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of reducing the adsorption effect of materials, achieve improved adsorption performance, simple preparation process, and easy The effect of recycling

Inactive Publication Date: 2019-03-01
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, single-layer two-dimensional graphene is easy to agglomerate through the interaction of π-π bonds between them, which greatly reduces the adsorption effect of the material.

Method used

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  • Modified three-dimensional graphene composite material, and preparation method and application thereof
  • Modified three-dimensional graphene composite material, and preparation method and application thereof
  • Modified three-dimensional graphene composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a three-dimensional graphene and its preparation method, and provides a polyacrylamide modified three-dimensional graphene composite material and its preparation method, and provides a polyacrylamide and β-cyclodextrin modified three-dimensional graphite Alkene composite materials and methods for their preparation.

[0043] The preparation method method of described three-dimensional graphene comprises the following steps:

[0044] (1) disperse the graphene oxide in water, ultrasonically disperse it for 2 hours, and obtain a graphene oxide solution with a concentration of 2 mg / mL;

[0045] (2) Add 0.2 g of sodium ascorbate to the graphene oxide solution, stir for 10 min, put the resulting reaction solution into a reaction kettle, and heat at 90° C. for 12 h to obtain a black cylindrical substance, which is filtered and washed with ultrapure water Wash, put into freeze vacuum drier and dry 48h, obtain three-dimensional graphene composite materia...

Embodiment 2

[0057] This embodiment provides a modified three-dimensional graphene composite material and a preparation method thereof.

[0058] The preparation method comprises the following steps:

[0059] (1) disperse the graphene oxide in water, and ultrasonically disperse it for 4 hours to obtain a graphene oxide solution with a concentration of 1 mg / mL;

[0060] (2) ultrasonically mix 20mL graphene oxide solution with 5mL polyacrylamide solution with a concentration of 0.6wt%, add 0.06g β-cyclodextrin, and stir thoroughly to obtain a mixed solution;

[0061] (3) Add 0.2g sodium ascorbate to the mixed solution, stir for 30min, put the obtained reaction solution in a reaction kettle, heat at 85°C for 16h, obtain a black cylindrical substance, filter, wash with ultrapure water, Put it into a freeze-vacuum dryer and dry for 60 hours to obtain a three-dimensional graphene composite material modified by polyacrylamide and β-cyclodextrin.

[0062] The obtained modified three-dimensional g...

Embodiment 3

[0064] This embodiment provides a modified three-dimensional graphene composite material and a preparation method thereof.

[0065] The preparation method comprises the following steps:

[0066] (1) disperse the graphene oxide in water, and ultrasonically disperse it for 3 hours to obtain a graphene oxide solution with a concentration of 3 mg / mL;

[0067] (2) ultrasonically mix 10mL of graphene oxide solution with 5mL of 0.4wt% polyacrylamide solution, add 0.15g of β-cyclodextrin, and fully stir to obtain a mixed solution;

[0068] (3) Add 0.15g of sodium ascorbate to the mixed solution, stir for 20min, put the resulting reaction solution into a reaction kettle, and heat at 95°C for 14h to obtain a black cylindrical substance, which is filtered and washed with ultrapure water. Put it into a freeze-vacuum dryer and dry for 54 hours to obtain a three-dimensional graphene composite material modified by polyacrylamide and β-cyclodextrin.

[0069] The obtained modified three-dime...

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Abstract

The invention belongs to the technical fields of environmental functional materials and water treatment and particularly relates to a modified three-dimensional graphene composite material, and a preparation method and an application thereof. The method includes: mixing polyacrylamide, beta-cyclodextrin and graphene oxide, and performing one-step chemical reduction to synthesize the composite material. The material has a three-dimensional pore structure and abundant functional groups, so that a problem of agglomeration of two-dimensional graphene is avoided and adsorption effect of an adsorbent to antibiotics in water is significantly enhanced. The preparation method is simple and is gentle in conditions, wherein all the modification materials are green chemical reagents, so that the wholemethod is free of secondary pollution, and the adsorbent is free of toxicity on environment. When being applied to removal of ciprofloxacin in water, the material is low in cost and can reach up to 73.63% in removal rate. The three-dimensional graphene can be separated from the solution easily and rapidly and is easy to recycle.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials and water treatment, and specifically relates to a modified three-dimensional graphene composite material and its preparation method and application. Background technique [0002] Antibiotics are one of the most used drugs in the world. They have been widely used to treat various non-viral infections in humans and animals, and are often added to animal feed to promote their growth. Studies have shown that most antibiotics cannot be fully absorbed after entering the body, and about 40% to 90% of antibiotics are excreted with feces and urine in the form of parent or metabolites, and then enter water and soil through various channels, which have a negative impact on the ecological environment system. cause great harm to human health. Especially for antibiotic pollution in water bodies, it is of great significance to study the removal of antibiotics to protect human health....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/26C02F9/04C02F101/38
CPCB01J20/20B01J20/26C02F1/001C02F1/285C02F1/66C02F9/00C02F2101/38
Inventor 黄少斌刘颖赵雪松张永清黄俊
Owner SOUTH CHINA UNIV OF TECH
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