Magnetically separable ferroferric oxide/phosphorylatedgraphene composite nanomaterial

A technology of composite nanomaterials and iron tetroxide, which is applied in the field of nanomaterials to achieve the effects of realizing recycling, improving the efficiency of enrichment and recovery, and reducing the cost of enrichment and recovery.

Inactive Publication Date: 2018-11-20
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] Aiming at the above-mentioned performance defects of graphene-based adsorbents, the present invention provides a magnetically separable Fe3O4 / phosphorylated graphene composite nanomaterial and its application for the enrichment and recovery of rare earth gadolinium ions, so as to solve the current The existing technology cannot realize the efficient adsorption of gadolinium ions and the recycling of the adsorption materials at the same time to reduce the technical problem of enrichment and recovery costs

Method used

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  • Magnetically separable ferroferric oxide/phosphorylatedgraphene composite nanomaterial
  • Magnetically separable ferroferric oxide/phosphorylatedgraphene composite nanomaterial
  • Magnetically separable ferroferric oxide/phosphorylatedgraphene composite nanomaterial

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Embodiment 1

[0032] (1) Preparation of Magnetic Separable Fe3O4 / Phosphated Graphene Composite Nanomaterials

[0033] Disperse 1 g of graphene oxide into 150 mL of a mixed solution of anhydrous tetrahydrofuran and triethylamine with a volume ratio of 2, and sonicate in an ice-water bath to obtain a 6.67 mg / mL graphene oxide suspension. In an ice-water bath, 100 mL of anhydrous tetrahydrofuran containing 10 mL of phosphorus trichloride was added to the rapidly stirred graphene oxide suspension. Then the mixture was refluxed at 80 °C for 24 h, and after cooling, 500 mL of water was slowly added in batches. Centrifuge, wash and filter until the filtrate is clear, then add water to the filter cake and ultrasonically disperse it. The dispersion was hydrolyzed at 60 °C for 2 h. During the hydrolysis process, the pH of the solution was adjusted to 5-8 with 1 mol / L sodium hydroxide solution. After washing and filtering, it was ultrasonically dispersed in water, and then freeze-dried to obtain flu...

Embodiment 2

[0037] In Example 1, "disperse ferric chloride hexahydrate and ferric dichloride tetrahydrate in deionized water in a molar ratio of 1 to form a 0.02 mol / L mixed ion solution." Ferric trichloride hydrate and ferric dichloride tetrahydrate are dispersed in deionized water in a molar ratio of 0.5 to form a 0.02 mol / L mixed ion solution.” Other preparation conditions are the same as in Example 1, and the obtained magnetically The magnetic saturation strength of the isolated Fe3O4 / phosphorylated graphene composite nanomaterial is 15.6 emu / g, which can achieve magnetic separation within 15 minutes.

Embodiment 3

[0039] In Example 1, "2 mg magnetically separable ferric oxide / phosphorylated graphene composite nanomaterials were dispersed in 100 mg / L rare earth gadolinium ion solution." was replaced with "10 mg magnetically separable ferric oxide The tri-iron / phosphorylated graphene composite nanomaterial is dispersed in a 320 mg / L rare earth gadolinium ion solution." Other adsorption conditions remained unchanged, and its adsorption capacity was 353.18 mg / g.

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Abstract

The invention discloses a magnetically separable ferroferric oxide / phosphorylatedgraphene composite nanomaterial which is prepared bythefollowing steps: 1) adding a mixed solution of anhydrous tetrahydrofuran and phosphorus trichloride to a graphene oxide suspension with anhydrous tetrahydrofuran and triethylamine as solvents, stirring, back-flowing, washing, filtering, and performing ultrasonic dispersion on filter cakes with water; 2) hydrolyzing a dispersion solution obtained in step 1), washing, filtering, performing ultrasonic dispersion, and drying to obtain phosphorylated graphene; 3) adding stearic acid, ferric chloride hexahydrate, and ferric dichloride tetrahydrate to a mixed solution of anhydrous sodium acetate and polyethylene glycol 600 to form a mixed ion solution; and 4) adding the anhydrous ethanol dispersion solution of phosphorylatedgraphene to the mixed ion solution for hydrothermal reaction. The invention also discloses enrichment and recycling application of the material on rare earth gadolinium ions. The invention simultaneously realizes the effective adsorption of the gadolinium ions and recycling of adsorbing materials.

Description

technical field [0001] The invention relates to a magnetically separable iron ferric oxide / phosphorylated graphene composite nanomaterial and its application for enrichment and recovery of rare earth gadolinium ions, belonging to the field of nanomaterials. Background technique [0002] As industrial vitamins, rare earth elements have extremely high added value and important strategic significance. However, with the development and utilization of rare earth resources, the waste of rare earth resources and the harm to the environment are becoming more and more serious. As an important element additive in the high-tech field, gadolinium is widely used in the fields of nuclear magnetic imaging, information storage, magnetic refrigeration and neutron deceleration. Trace amounts of gadolinium in the environment can promote the proliferation of cancer cells, and as a heavy metal, it is also highly destructive to biological cells. Therefore, in view of the loss of gadolinium caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D15/08
CPCB01D15/08B01J20/0292B01J20/06B01J20/20B01J20/28009
Inventor 王金清杨启毅杨生荣贾卫红
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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