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ZnFe2O4 hollow sphere-RGO composite material and preparation method thereof

A composite material, znfe2o4 technology, applied in the field of ZnFe2O4 hollow sphere-RGO composite material and preparation, can solve the problems of low concentration gas detection performance to be improved, final product cannot be acetone gas detection, complex preparation method, etc., to improve electron mobility , good gas-sensing properties, simple and safe preparation method

Active Publication Date: 2019-06-07
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned preparation method is complex and costly; the final product prepared cannot effectively detect low-concentration acetone gas, and the selectivity and low-concentration gas detection performance need to be improved

Method used

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  • ZnFe2O4 hollow sphere-RGO composite material and preparation method thereof
  • ZnFe2O4 hollow sphere-RGO composite material and preparation method thereof
  • ZnFe2O4 hollow sphere-RGO composite material and preparation method thereof

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Effect test

Embodiment 1

[0038] At room temperature, 50ml (0.5mg / ml) of the solution was ultrasonically treated for 2 hours, and stirred with a glass rod for 1 minute every 30 minutes to obtain a graphene oxide dispersion with a good dispersion effect. Mix 8ml of glycerol and 30ml of isopropanol, and stir magnetically to obtain a homogeneous solution. 0.5mmol Zn(CH 3 COO) 2 2H 2 O, 1mmol Fe(NO 3 ) 3 9H 2 O and 0.242ml GO dispersion liquid were successively added into the mixed solvent while stirring, and a uniform solution was obtained after stirring for a certain period of time. Then transfer it to a 50ml polytetrafluoroethylene-lined stainless steel autoclave, seal it, and keep it at 180°C for 12h. After the reaction is over, cool it down to room temperature naturally, centrifuge, wash, and dry the product at 80°C for 12h , to obtain the precursor material. Finally, the obtained precursor material was subjected to high-temperature inert atmosphere heat treatment at a temperature of 400°C, hel...

Embodiment 2

[0040] At room temperature, 50ml (0.5mg / ml) of the solution was ultrasonically treated for 2 hours, and stirred with a glass rod for 1 minute every 30 minutes to obtain a graphene oxide dispersion with a good dispersion effect. Mix 8ml of glycerol and 30ml of isopropanol, and stir magnetically to obtain a homogeneous solution. 0.5mmol Zn(CH 3 COO) 2 2H 2 O, 1mmol Fe(NO 3 ) 3 9H 2 O and 0.602ml GO dispersion liquid were successively added to the mixed solvent while stirring, and a uniform solution was obtained after stirring for a certain period of time. Then transfer it to a 50ml polytetrafluoroethylene-lined stainless steel autoclave, seal it, and keep it at 180°C for 12h. After the reaction is over, cool it down to room temperature naturally, centrifuge, wash, and dry the product at 80°C for 12h , to obtain the precursor material. Finally, the obtained precursor material was subjected to high-temperature inert atmosphere heat treatment at a temperature of 400°C, held ...

Embodiment 3

[0042] At room temperature, 50ml (0.5mg / ml) of the solution was ultrasonically treated for 2 hours, and stirred with a glass rod for 1 minute every 30 minutes to obtain a graphene oxide dispersion with a good dispersion effect. Mix 8ml of glycerol and 30ml of isopropanol, and stir magnetically to obtain a homogeneous solution. 0.5mmol Zn(CH 3 COO) 2 2H 2 O, 1mmol Fe(NO 3 ) 3 9H 2 O and 1.205ml GO dispersion liquid were successively added to the mixed solvent while stirring, and a uniform solution was obtained after stirring for a certain period of time. Then transfer it to a 50ml polytetrafluoroethylene-lined stainless steel autoclave, seal it, and keep it at 180°C for 12h. After the reaction is over, cool it down to room temperature naturally, centrifuge, wash, and dry the product at 80°C for 12h , to obtain the precursor material. Finally, the obtained precursor material was subjected to high-temperature inert atmosphere heat treatment at a temperature of 400°C, held ...

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Abstract

The invention belongs to the field of materials, and more particularly relates to a ZnFe2O4 hollow sphere-RGO composite material and a preparation method thereof. The material comprises zinc ferrite hollow spheres and flaky graphene, wherein the zinc ferrite hollow spheres are attached to the surface of the flaky graphene. The preparation method comprises the following steps: (1) dissolving a zincsalt and a trivalent iron salt in an organic solvent, adding a graphene oxide dispersion to the organic solvent, and conducting stirring to obtain a mixed solution; (2) transferring the mixed solution to a stainless steel high pressure reactor lined with polytetrafluoroethylene, sealing the reactor for a reaction, and conducting natural cooling, centrifuging, washing and drying to obtain a precursor; and (3) carrying out heat treatment on the precursor in an inert atmosphere to obtain the ZnFe2O4 hollow sphere-RGO composite material. According to the invention, a zinc ferrite hollow sphere-reduced graphene oxide composite material is prepared by combining a simple one-step synthesis process with a high-temperature inert atmosphere heat treatment process; the material prepared by the preparation method disclosed by the invention has large specific surface area and improved electron mobility; and the preparation method is simple and safe, low in cost, and high in practicability.

Description

technical field [0001] The invention belongs to the field of gas sensitive materials, in particular a ZnFe 2 o 4 Hollow sphere-RGO composite material and preparation method. Background technique [0002] As a volatile organic compound, acetone has a certain degree of danger. Its boiling point is only 56.5°C. It is volatile, chemically active, and extremely flammable. It may even form explosives and explode when mixed with air. In addition, it has a certain degree of irritation and toxicity, and long-term exposure to this item will pose a threat to human health. When the concentration of acetone is between 500-1000ppm, it will irritate the nose, throat and eyes. When it is 1000ppm, it can cause headache and dizziness. When it is 2000-10000ppm, it can cause drunkenness, nausea and vomiting. death, so it is of great significance to detect and monitor the concentration of acetone in the ambient air. In addition, acetone is also a product of fat metabolism in the human body, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/194C01G49/00G01N27/12
Inventor 张超吴凯迪刘贵方环瑀淳
Owner YANGZHOU UNIV
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