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Preparation of bifeo based on hydrothermal method 3 Nanosheet method and bifeo 3 Nanosheets

A technology of nanosheets and hydrothermal method, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science. It can solve problems such as high temperature requirements, small synthetic particle size, and difficult mixing to achieve dispersibility Good, good crystallization, excellent feasibility and controllability

Inactive Publication Date: 2021-06-25
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the solid-phase method has higher requirements on the temperature of the reaction, and the mixing is also more difficult, and it is difficult to synthesize a powder with small particle size, uniform distribution, high purity and stable performance.

Method used

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  • Preparation of bifeo based on hydrothermal method <sub>3</sub> Nanosheet method and bifeo <sub>3</sub> Nanosheets
  • Preparation of bifeo based on hydrothermal method <sub>3</sub> Nanosheet method and bifeo <sub>3</sub> Nanosheets
  • Preparation of bifeo based on hydrothermal method <sub>3</sub> Nanosheet method and bifeo <sub>3</sub> Nanosheets

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Dissolve 0.699g (3mmol / L) of bismuth oxide with 4mL of 37% hydrochloric acid, add 46mL of water, then add 0.812g (6mmol / L) of ferric chloride hexahydrate, and stir until dissolved.

[0026] (2) Add 2.675g (1mol / L) of ammonium chloride to the above solution, and add 12g (6mol / L) of sodium hydroxide after dissolving. Seal with plastic wrap and stir with a magnetic stirrer for 20 minutes to form BiFeO 3 Precursor.

[0027] (3) Put the above precursor into a polytetrafluoroethylene hydrothermal kettle, and heat it at 200°C for 10 hours. After the reaction, cool to room temperature. Lotion, dry to get BiFeO 3 Nanosheets.

[0028] figure 1 In this embodiment, the mineralizer is 6 mol / L, and the hydrothermal time is the SEM image of 10 h. It can be seen that the morphology is basically flakes, the dispersion is good, the size is 300-500nm, and the thickness is 50nm.

[0029] figure 2 In this embodiment, the mineralizer is 6mol / L, and the hydrothermal time is the X...

Embodiment 2

[0031] (1) Dissolve 0.699g (3mmol / L) of bismuth oxide in 4mL of 37% hydrochloric acid, add 46mL of water, then add 0.812g (6mmol / L) of ferric chloride hexahydrate, and stir until dissolved.

[0032] (2) Add 2.675g (1mol / L) of ammonium chloride to the above solution, and add 16g (8mol / L) of sodium hydroxide after dissolving. Seal with plastic wrap and stir with a magnetic stirrer for 20 minutes to form BiFeO 3 Precursor.

[0033] (3) Put the above precursor into a polytetrafluoroethylene hydrothermal kettle, and heat it at 200°C for 10 hours. After the reaction, cool to room temperature. Lotion, dry to get BiFeO 3 Nanosheets.

[0034] image 3 In this embodiment, the mineralizer is 8mol / L, and the hydrothermal time is the SEM image of 10h. It can be seen that the morphology is basically flakes, the dispersion is good, the size is 600-800nm, and the thickness is 50nm.

[0035] Figure 4 In the present embodiment, the mineralizer is 8mol / L, and the hydrothermal time is th...

Embodiment 3

[0037] (1) Dissolve 0.699g (3mmol / L) of bismuth oxide in 4mL of 37% hydrochloric acid, add 46mL of water, then add 0.812g (6mmol / L) of ferric chloride hexahydrate, and stir until dissolved.

[0038] (2) Add 2.675g (1mol / L) ammonium chloride to the above solution, and add an appropriate amount of 12g (6mol / L) sodium hydroxide after dissolving. Seal with plastic wrap and stir with a magnetic stirrer for 20 minutes to form BiFeO 3 Precursor.

[0039] (3) Put the above precursor into a polytetrafluoroethylene hydrothermal kettle, and heat it at 200°C for 10 hours. After the reaction, cool to room temperature. Lotion, dry to get BiFeO 3 Nanosheets.

[0040] Figure 5 In this embodiment, the mineralizer is 6 mol / L, and the hydrothermal time is the SEM image of 6 hours. It can be seen that the morphology is basically flakes, with good dispersion, and the size is between 500-700nm, but the thickness of the flakes varies greatly and is distributed in 50-200nm.

[0041] Figure ...

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Abstract

The invention discloses a method for preparing BiFeO based on a hydrothermal method 3 Nanosheet approach and BiFeO 3 Nanosheets, BiFeO synthesized by a facile hydrothermal method 3 Nanosheets. Bismuth oxide was dissolved by 4 ml of hydrochloric acid. Adjust the concentration of NaOH, 200 ℃ hydrothermal. Form BiFeO with good dispersion and regular shape 3 Nanosheets. The process is simple in operation, easy to control, non-toxic and harmless in the production process, low in cost, and suitable for mass production or machine production. In addition, the nanosheet-like morphology has a wide range of potential applications in electrical components, interlayers of nanogenerators, and photocatalysis.

Description

technical field [0001] The invention belongs to the field of chemical material preparation, in particular to a method for preparing BiFeO based on a hydrothermal method 3 Nanosheet approach and BiFeO 3 Nanosheets for the preparation of BiFeO by a facile hydrothermal method 3 Nanosheets have very important uses in information storage devices, spintronic devices and sensors, degradation of pollutants, and interlayers of nanogenerators. [0002] technical background [0003] BiFeO 3 As a typical magnetoelectric material, it is widely used in information storage devices, spintronic devices and sensors, and degradation of pollutants due to its good ferroelectricity and ferromagnetism. BiFeO 3 At the same time, as a functional material, as the demand for electrical components increases, BiFeO 3 Demand for this material is also increasing. [0004] Current BiFeO 3 Preparation methods include solid-phase method, chemical precipitation method, sol-gel method, solid-liquid phase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G49/00C01P2002/72C01P2004/03C01P2004/62
Inventor 赵巍王虎刚荣嘉诚张琪郭晶晶佘凯翔李明晓
Owner TIANJIN CHENGJIAN UNIV
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