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A kind of magnetic polyaniline/graphene composite material and preparation method and application thereof

A composite material, graphene technology, applied in the field of nanomaterials and environmental science, can solve problems such as human health hazards

Inactive Publication Date: 2018-01-30
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of its high stability and the presence of different compounds, such as Cr 2 o 7 2- , CrO 4 2- 、HCrO 4 - With high water solubility and strong oxidizing ability, it will cause serious harm to human health

Method used

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  • A kind of magnetic polyaniline/graphene composite material and preparation method and application thereof
  • A kind of magnetic polyaniline/graphene composite material and preparation method and application thereof
  • A kind of magnetic polyaniline/graphene composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] [Example 1] polyaniline / Fe 3 o 4 / Preparation of graphene composites

[0028] This embodiment is polyaniline / Fe 3 o 4 / The preparation of graphene composite material, its steps are as figure 1 As shown, the specific operation method is as follows:

[0029] (1) Fe 3 o 4 / Preparation of graphene composite material: Take 150mL of 0.2mg / mL graphene oxide solution in a beaker, weigh 0.9g FeCl 2 4H 2 Add the O sample into the graphene oxide solution and ultrasonically disperse until it is completely dissolved, then slowly add ammonia water dropwise until the pH of the solution is 10, stop adding ammonia water when the black particles in the solution no longer increase, use a magnet to absorb all the black particles, and suck them out The supernatant was then ultrasonically washed 3-4 times with distilled water, and vacuum-dried at 50° C. for 6 hours.

[0030] (2) Modified polyaniline: take Fe respectively 3 o 4 / graphene composite material 0.2g, p-toluenesulfonic...

Embodiment 2

[0032] [Example 2] polyaniline / Fe 3 o 4 / Graphene composites applied to the removal of Cr(VI) in water

[0033] (1) Establishment of analytical methods

[0034] In this experiment, diphenylcarbazide spectrophotometry was used to measure the Cr(VI) content in water, a series of Cr(VI) standard solutions with a concentration gradient of 0.02 to 2.0 mg / L were prepared, and the standard Curve, the linear equation is: A=0.5827C+7.284×10 -3 (r 2=0.9999), wherein A is the absorbance value at 540nm, and C is the concentration (mg / L) of Cr(VI). Then prepare a series of Cr(VI) solutions with a concentration of 2.0, 4.0, 8.0, 12.0, 16.0, 20.0, 50.0, 100.0, 200.0 and 300.0 mg / L at a pH of 3.0, and add 10.0 mg polyaniline / Fe 3 o 4 / graphene composite material, the concentration of Cr(VI) in the solution is measured after adsorption for a certain period of time, according to formula 1:

[0035] (Formula 1)

[0036] Among them, C 0 and C e are the initial and equilibrium conce...

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PUM

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Abstract

The invention belongs to the field of nanomaterials and environmental science and technology, and relates to a magnetic polyaniline / graphene composite material and its preparation method and application. A magnetic polyaniline / graphene composite material, comprising graphene, magnetic nanoparticles and polyaniline, is characterized in that the composite material is framed with graphene, and the magnetic nanoparticles and polyaniline are dispersed in graphene sheets structured surface. The present invention aims at improving the removal efficiency and adsorption capacity of hexavalent chromium in water in the field of environmental pollution, and provides a polyaniline / Fe3O4 / graphene composite material in combination with the current research trend of magnetic graphene materials and polymer composites at home and abroad. The preparation method, and the material was successfully used for the removal of hexavalent chromium in water.

Description

technical field [0001] The invention belongs to the field of nanomaterials and environmental science and technology, and relates to a magnetic polyaniline / graphene composite material and its preparation method and application. Background technique [0002] In recent years, more and more attention has been paid to the pollution of heavy metals in water, especially the presence of hexavalent chromium, which is highly toxic. Because of its high stability and the existence of different compounds, such as Cr 2 o 7 2- , CrO 4 2- 、HCrO 4 - With high water solubility and strong oxidizing ability, it will cause serious harm to human health. The maximum allowable limit of total chromium content in drinking water in my country is 0.05mg / L. Therefore, it is urgent to find some effective methods to remove chromium in water so as to reduce the harm to the environment and human health. At present, the methods used to remove chromium in water include ion exchange, membrane filtratio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02C08K3/04C08K3/22C02F1/28C02F1/62
CPCC02F1/285C02F1/62C08G73/0266C08K3/04C08K3/22C08K2003/2275C08K2201/011
Inventor 郭慢丽邹静冯岩龙杨玫曹玉娟俞英
Owner SOUTH CHINA NORMAL UNIVERSITY