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Magnetic graphene adsorbing material for adsorbing phosphorus in water, preparation method and adsorption method

A technology of magnetic graphene and adsorption materials, applied in the direction of adsorption water/sewage treatment, separation methods, chemical instruments and methods, etc., to achieve excellent adsorption performance, excellent adsorption, high selectivity, and easy recycling

Inactive Publication Date: 2016-06-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the selectivity of adsorption materials, high-efficiency water treatment and resource recovery are achieved, and the problem of water bloom is fundamentally solved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) 0.2g graphene oxide (GO), 0.83gFeCl 3 ·6H 2 O and 0.34gFeCl 2 4H 2 O was ultrasonically dispersed in 200mL deionized water, passed through N 2 For protection, add 20mL of ammonia water (25%), and react with ultrasound (300W) at 55°C for 2h. Then add 2 mL of hydrazine hydrate (80%), raise the temperature to 95 ° C and react for 6 h, the obtained product is recovered by magnetic decantation, washed several times and then freeze-dried to obtain the loaded Fe 3 o 4 graphene (Fe 3 o 4 -GNS).

[0026] (2) the above obtained Fe 3 o 4 -GNS, 1.6g4,4`-diaminodiphenylmethane was dispersed in 100mL tetrahydrofuran in a certain proportion, and 50mL tetrahydrofuran solution containing 0.8g hexachlorocyclotriphosphazene was slowly added under the action of ultrasound (150W), refluxed and condensed, in Reacted at 50°C for 4 hours, the obtained product was recovered by magnetic decantation, washed several times and then freeze-dried to obtain polyphosphazene-coated Fe 3 o...

Embodiment 2

[0029] (1) 0.2g graphene oxide (GO), 0.83gFeCl 3 ·6H 2 O and 0.34gFeCl 2 4H 2 O was ultrasonically dispersed in 200mL deionized water, passed through N 2 For protection, add 20mL of ammonia water (25%), and react with ultrasound (300W) at 55°C for 2h. Then add 2 mL of hydrazine hydrate (80%), raise the temperature to 95 ° C and react for 6 h, the obtained product is recovered by magnetic decantation, washed several times and then freeze-dried to obtain the loaded Fe 3 o 4 graphene (Fe 3 o 4 -GNS).

[0030] (2) the above obtained Fe 3 o 4 -GNS, 1.6g4,4`-diaminodiphenylmethane was dispersed in 100mL tetrahydrofuran in a certain proportion, and 50mL tetrahydrofuran solution containing 0.8g hexachlorocyclotriphosphazene was slowly added under the action of ultrasound (150W), refluxed and condensed, in Reacted at 50°C for 4 hours, the obtained product was recovered by magnetic decantation, washed several times and then freeze-dried to obtain polyphosphazene-coated Fe 3 o...

Embodiment 3

[0034] (1) 0.2g graphene oxide (GO), 0.42gFeCl 3 ·6H 2 O and 0.17gFeCl 2 4H 2 O was ultrasonically dispersed in 200mL deionized water, passed through N 2 For protection, add 15mL of ammonia water (25%), and react with ultrasound (300W) at 60°C for 2h. Then add 2 mL of hydrazine hydrate (80%), raise the temperature to 95 ° C and react for 8 h, the product obtained is recovered by magnetic decantation and washed several times and freeze-dried to obtain the loaded Fe 3 o 4 graphene (Fe 3 o 4 -GNS).

[0035] (2) the above obtained Fe 3 o 4 -GNS, 1.2g4,4`-diaminodiphenylmethane was dispersed in 100mL tetrahydrofuran in a certain proportion, and 50mL tetrahydrofuran solution containing 0.6g hexachlorocyclotriphosphazene was slowly added under the action of ultrasound (150W), refluxed and condensed, in Reacted at 55°C for 6 hours, the obtained product was recovered by magnetic decantation, washed several times and then freeze-dried to obtain polyphosphazene-coated Fe 3 o ...

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Abstract

The invention relates to a magnetic graphene adsorbing material for adsorbing phosphorus in water, a preparation method and an adsorption method. According to the preparation method, firstly, spherical Fe3O4 magnetic nanospheres are supported on the surface of GO with a coprecipitation method under the ultrasonic action, and Fe3O4-supported GO (Fe3O4-GO) is prepared; Fe3O4-GO is reduced by hydrazine hydrate, and Fe3O4-supported graphene(Fe3O4-GNS) is prepared; Fe3O4 is coated with active-amino-terminated PZD with a copolymerizing precipitation method, and PZD-coated Fe3O4-supported graphene (PZD@Fe3O4-GNS) is prepared; a layer of La2O3 nanoparticles are deposited on the surface of PZD@Fe3O4-GNS, and La2O3-PZD@Fe3O4-GNS quaternary nanoparticles are prepared. The preparation conditions are mild, the operation is simple, a product is simple to separate, and the obtained product has excellent adsorption performance on phosphate particles, is free of pollution on the ecological environment and has quite broad application prospect in the aspects of efficient and rapid treatment of a large water area with phosphorus pollution and resource recycling.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials and sewage treatment, and in particular relates to a magnetic graphene adsorption material for adsorbing phosphorus in water, a preparation method and an adsorption method. Background technique [0002] Phosphorus is an essential nutrient element for organisms, but it is also the main factor of water eutrophication. Water eutrophication has become a very serious environmental problem in today's world. Algal blooms have occurred in many lakes in the world, resulting in the death of a large number of aquatic organisms and the pollution of water resources. Algae and plankton are the main components of water blooms. Phosphorus is an essential nutrient element for algae growth. Controlling the concentration of phosphorus in water bodies and recycling phosphorus resources are the fundamental methods to solve the problem of water blooms. The current methods for treating phosph...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/04C02F1/28
CPCB01D53/04B01J20/0207B01J20/0229B01J20/0259B01J20/20B01J20/28009B01J2220/42C02F1/281C02F2101/20
Inventor 颜红侠刘超顾斌丁凡吕青
Owner NORTHWESTERN POLYTECHNICAL UNIV
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