Preparation method and application of three-dimensional graphdiyne/Fe3O4 nano composite material

A nanocomposite material and graphdiyne technology, which is applied in the field of preparation of three-dimensional graphdiyne/Fe3O4 composite materials, achieves the effects of simple method, easy operation, high stability and dispersibility

Active Publication Date: 2020-10-30
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

About GDY and Fe 3 o 4 The nanocomposite, ...

Method used

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  • Preparation method and application of three-dimensional graphdiyne/Fe3O4 nano composite material
  • Preparation method and application of three-dimensional graphdiyne/Fe3O4 nano composite material
  • Preparation method and application of three-dimensional graphdiyne/Fe3O4 nano composite material

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Embodiment 1

[0025] (1) Treatment of graphyne nanotubes: Disperse 5 mg graphyne nanotubes in 5 mL concentrated H 2 SO 4 (98%), treated at 60°C for 6 hours, cooled with ice water, centrifuged at 12,000 rpm for 15 minutes to remove mixed acid, washed repeatedly with distilled water to make the clear liquid neutral, and finally centrifuged at 12,000 rpm Separate and dry in an oven at 80°C for 24 hours;

[0026] (2) Add 10 ml of 1.0 mmol / L FeCl 3 and 0.5 mmol / L FeCl 2 The mixed solution was placed in a 50 ml three-necked flask and stirred vigorously under nitrogen protection. After thorough mixing, 5.0 mg of GDY treated in step (1) was dispersed in the above solution and stirred continuously for 30 minutes. The solution was incubated at 35°C, and then aqueous ammonia was added dropwise to adjust the pH value of the solution to 8.5. After continuing to stir the mixed solution for one hour, the temperature was raised rapidly, and the stirring reaction was continued at a constant temperature ...

Embodiment 2

[0033] (1) Treatment of graphyne nanotubes: Weigh 10 mg graphyne and disperse in 8 mL concentrated HNO at 1:3 3 (68%), and H 2 SO 4 (98%) and the mixture, treated at 80°C for 8 hours, cooled with ice water, centrifuged at 14,000 rpm for 10 min at high speed, after acid removal, washed repeatedly with distilled water until the clear liquid was neutral, and finally 14,000 rpm Centrifuge and dry in an oven at 80°C for 24 hours;

[0034] (2) Add 10 ml of 3.0 mmol / L FeCl 3 and 1.0 mmol / L FeCl 2 The mixed solution was placed in a 25 ml three-necked flask and stirred vigorously under nitrogen protection. After thorough mixing, 10.0 mg of GDY treated in step (1) was dispersed in the above solution and stirred continuously for 30 minutes. The solution was kept warm at 45°C, and then a mixed base of concentrated ammonia water with a volume ratio of 1:1 and 2.5 mol / L NaOH was added dropwise to adjust the pH value of the solution to 10.0. After continuing to stir the mixed solution f...

Embodiment 3

[0036] (1) Treatment of graphyne nanotubes: Weigh 20 mg graphyne and disperse in 20 mL concentrated HNO at 1:2 3 (68%), and H 2 SO 4 (98%) and the mixture, treated at 70°C for 5 hours, cooled with ice water, centrifuged at 14000 rpm for 20min at high speed, after acid removal, washed repeatedly with distilled water until the clear liquid was neutral, and finally 14000 rpm Centrifuge and dry in an oven at 80°C for 24 hours;

[0037] (2) Add 20 ml of 2.0 mmol / L FeCl 3 and 1.0 mmol / L FeCl 2 The mixed solution was placed in a 50 ml three-necked flask and stirred vigorously under nitrogen protection. After thorough mixing, 15 mg of GDY treated in step (1) was dispersed in the above solution and stirred continuously for 30 minutes. The solution was kept warm at 45°C, and then a mixed base of concentrated ammonia water with a volume ratio of 3:1 and 1.0 mol / L KOH was added dropwise to adjust the pH value of the solution to 10.0. After continuing to stir the mixed solution for on...

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Abstract

The invention discloses a preparation method of a three-dimensional graphdiyne/Fe3O4 nano composite material. The preparation method comprises the steps: (1) treating three-dimensional graphdiyne; and(2) mixing FeCl3 and FeCl2 solutions with a certain concentration, and violently stirring under the protection of nitrogen; dispersing the treated graphdiyne GDY into the mixed solution, keeping theconstant temperature of 30-50 DEG C, dropwise adding strong base, adjusting the pH value of the solution, quickly heating after reacting for a period of time, and continuously carrying out stirring reaction for a period of time at a constant temperature; and finally, naturally cooling to room temperature, separating, cleaning, and carrying out vacuum drying to obtain the three-dimensional graphdiyne/Fe3O4 nano composite material. According to the composite material, a three-dimensional surface structure of GDY, a great effective surface area and excellent surface characteristics of graphdiyneare utilized, Fe3O4 nano-particles are compactly and uniformly loaded on the surfaces of graphdiyne nano-sheets, and the stability and dispersity of the Fe3O4 nano-particles are greatly improved. Thecomposite material can be used for sewage purification.

Description

technical field [0001] The invention belongs to the technical field of new materials, in particular to a three-dimensional graphyne / Fe 3 o 4 Preparation methods of composite materials and their applications. Background technique [0002] Iron oxide (Fe 3 o 4 ) Nanoparticles are oxides with semi-metallic ferromagnetism, which can be used as catalysts, have peroxidase-like activity, and can also enhance electrode conductivity and promote electron transfer. However, pure Fe 3 o 4 Due to their large specific surface area and high chemical activity, nanoparticles are easy to aggregate and oxidize, resulting in poor dispersion, which limits their practical application to a certain extent. Therefore, the use of support matrix or surface modification is very important to prevent Fe 3 o 4 It is important to aggregate nanoparticles and improve their stability. [0003] Graphdiyne (GDY) is a kind of sp and sp 2 Synthetic carbon allotropes with hybridized carbon atoms and π-co...

Claims

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Application Information

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IPC IPC(8): C01G49/06C01B32/15B82Y30/00B82Y40/00B01J23/745
CPCC01G49/06C01B32/15B01J23/745B01J35/1004B82Y30/00B82Y40/00C01P2004/03C01P2004/04C01P2002/72
Inventor 邓克勤肖靖李筱芳李春香
Owner HUNAN UNIV OF SCI & TECH
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