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A preparation method of graphene and octahedral ferrite composite magnetic nanomaterial

A technology of composite magnetic and nanomaterials, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., to achieve low pollution, good photocatalytic effect, and the effect of magnetic separation

Inactive Publication Date: 2019-04-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, TiO 2 The bandgap width is still relatively wide (rutile: 3.03eV; anatase: 3.18eV), still can only absorb a very small part of sunlight

Method used

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  • A preparation method of graphene and octahedral ferrite composite magnetic nanomaterial
  • A preparation method of graphene and octahedral ferrite composite magnetic nanomaterial
  • A preparation method of graphene and octahedral ferrite composite magnetic nanomaterial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of graphene and octahedral ferrite composite magnetic nanomaterial

[0024] (1) Add 0.0456g GO to 4mL ethylene glycol, sonicate for 4h to form a black liquid;

[0025] (2) Put (0.728; 2mmol) Mg(NO 3 ) 2 ·6H 2 O and (1.612g; 4mmol) Fe(NO 3 ) 3 9H 2 O was dissolved in 20mL of ethylene glycol, and magnetically stirred at room temperature to form a transparent solution;

[0026] (3) While stirring, add (1.31g) NaAc and the black liquid obtained in the step (1) to the solution in step (2), and continue to stir for 60min;

[0027] (4) Add the reaction mixture of step (3) into a 50mL polytetrafluoroethylene stainless steel reactor, and react in an oven at 200°C for 12h;

[0028] (5) Then the reactor was cooled to room temperature, the black precipitate was collected, washed three times with absolute ethanol, and then dried at 60° C. for 6 h;

[0029] (6) Calcining the black powder obtained in step (5) at a heating rate of 2° C. / min at 650° C. for 2...

Embodiment 2

[0036] A preparation method of graphene and octahedral ferrite composite magnetic nanomaterial

[0037] (1) Add 0.0142g GO to 4mL ethylene glycol, and ultrasonicate to form a uniform black liquid;

[0038] (2) Put (0.728; 2mmol) Mg(NO 3 ) 2 ·6H 2 O and (1.612g; 4mmol) Fe(NO 3 ) 3 9H 2 Dissolve O in 40mL of ethylene glycol and stir magnetically at room temperature to form a transparent solution;

[0039] (3) While stirring, add (1.31g) NaAc and the black liquid obtained in the step (1) to the solution in step (2), and continue to stir for 60min;

[0040] (4) Add the reaction mixture of step (3) into a 50mL polytetrafluoroethylene stainless steel reactor, and react in an oven at 200°C for 12h;

[0041] (5) Then the reactor was cooled to room temperature, the black precipitate was collected, washed three times with absolute ethanol, and then dried at 60° C. for 6 h;

[0042] (6) Calcining the black powder obtained in step (5) at a heating rate of 2° C. / min at 650° C. for ...

Embodiment 3

[0044] A preparation method of graphene and octahedral ferrite composite magnetic nanomaterial

[0045] (1) Add 0.0142g GO to 4mL ethylene glycol, and ultrasonicate to form a uniform black liquid;

[0046] (2) Put (0.595; 2mmol) Zn(NO 3 ) 2 ·6H 2 O and (1.612g; 4mmol) Fe(NO 3 ) 3 9H 2 Dissolve O in 40mL of ethylene glycol and stir magnetically at room temperature to form a transparent solution;

[0047] (3) While stirring, add (1.31g) NaAc and the black liquid obtained in the step (1) to the solution in step (2), and continue to stir for 60min;

[0048] (4) Add the reaction mixture of step (3) into a 50mL polytetrafluoroethylene stainless steel reactor, and react in an oven at 200°C for 12h;

[0049] (5) Then the reactor was cooled to room temperature, the black precipitate was collected, washed three times with absolute ethanol, and then dried at 60° C. for 6 h;

[0050] (6) Calcining the black powder obtained in step (5) at a heating rate of 2° C. / min at 650° C. for ...

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Abstract

The invention belongs to the field of new material preparation and provides a method for preparing graphene / ferrite composite magnetic nano-octahedrons. The present invention adopts hydrothermal method or solvothermal method to synthesize graphene / ferrite composite nanomagnetic octahedral material in one step. The synthesis method is simple, and the obtained graphene / ferrite composite octahedral material has a large surface area and strong magnetism, and has good photocatalytic effect on methyl orange and 1,2 dichlorobenzene under visible light irradiation. The material prepared by the invention can not only be used as an adsorbent, but also can be used as a visible light-responsive catalyst, which can be used for the photocatalytic degradation of various types of pollutants.

Description

technical field [0001] The invention belongs to the field of new material preparation, and relates to a preparation method of graphene and ferrite composite material, in particular to a preparation method of graphene and octahedral ferrite composite magnetic nanometer material. Background technique [0002] Photocatalysis is an effective environmental pollution control technology, which has attracted extensive attention of scientific researchers in recent years. Photocatalytic technology is inseparable from photocatalysts, which rely on the use of light energy (hv) to undergo redox reactions. Its energy band is composed of a valence band (VB) full of electrons and an empty conduction band. The band gap of the photocatalyst determines the wavelength range in which it can absorb light, and the smaller the band gap, the larger the wavelength range in which the photocatalyst can absorb light. TiO 2 As a traditional photocatalyst, it has always been a hot spot in photocatalysis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/02B01J20/28B01J20/30B01J23/745B01J23/80
CPCB01J20/0229B01J20/20B01J20/28009B01J20/28042B01J23/78B01J23/80B01J35/33B01J35/39
Inventor 高金索卢咏
Owner DALIAN UNIV OF TECH
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