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ZnO/SnO2 nano composite gas-sensitive material with flower-shaped grading structure and preparation method of material

A gas-sensitive material, flower-like classification technology, applied in analytical materials, nanotechnology, nanotechnology and other directions, to achieve the effects of good gas sensitivity, improved gas sensitivity, and broad application prospects

Inactive Publication Date: 2014-05-07
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And for ZnO nanoparticles and SnO 2 Three-dimensional flower-like ZnO / SnO assembled from nanosheets 2 Nanocomposite materials and methods for their preparation have not been reported in the literature

Method used

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  • ZnO/SnO2 nano composite gas-sensitive material with flower-shaped grading structure and preparation method of material
  • ZnO/SnO2 nano composite gas-sensitive material with flower-shaped grading structure and preparation method of material
  • ZnO/SnO2 nano composite gas-sensitive material with flower-shaped grading structure and preparation method of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Accurately weighed 1.822 g CTAB and 1.286 g SnCl 2 2H 2 O was added to 40 mL of absolute ethanol, and stirred until the solid was completely dissolved. 5 mL of 3 M NaOH aqueous solution was added dropwise to the above solution with stirring, and stirring was continued for 10 min after the dropwise addition was completed. The obtained solution was placed in a reaction kettle and reacted at 130°C for 15 h. After the reaction, the reaction kettle was naturally cooled to room temperature. The obtained precipitate was washed 4 times with deionized water and ethanol respectively. After centrifugation, it was dried at 60°C for 12 h. , to prepare SnO ???? Powder. Add 0.5 g of SnO powder prepared above to 20 ml containing 0.66 g Zn(CH 3 COO) 2 · 2H 2 O aqueous solution, after ultrasonic treatment for 10 min, the solvent was distilled off under reduced pressure to obtain ZnO / SnO 2 Precursors for nanocomposites. ZnO / SnO obtained in air atmosphere 2 The nanocomposite pre...

Embodiment 2

[0032] Accurately weighed 2.733 g CTAB and 1.929 g SnCl 2 2H 2 O was added to 60 mL of absolute ethanol, and stirred until the solid was completely dissolved. 7.5 mL of 3 M NaOH aqueous solution was added dropwise to the above solution with stirring, and stirring was continued for 10 min after the dropwise addition. The obtained solution was placed in a reaction kettle and reacted at 130°C for 12 h. After the reaction, the reaction kettle was naturally cooled to room temperature. The obtained precipitate was washed 4 times with deionized water and ethanol respectively. After centrifugation, it was dried at 60°C for 12 h. , to prepare SnO ???? Powder. Disperse 0.8 g of SnO powder prepared above in 20 ml containing 1.07 g Zn(CH 3 COO) 2 · 2H 2 O aqueous solution, after ultrasonic treatment for 10 min, the solvent was removed by low-temperature thermal evaporation, and ZnO / SnO 2 Precursors for nanocomposites. ZnO / SnO obtained in air atmosphere 2 The nanocomposite precu...

Embodiment 3

[0035] Accurately weighed 1.822 g CTAB and 1.286 g SnCl 2 2H 2 O was added to 40 mL of absolute ethanol, and stirred until the solid was completely dissolved. 5 mL of 3 M NaOH aqueous solution was added dropwise to the above solution with stirring, and stirring was continued for 10 min after the dropwise addition was completed. The obtained solution was placed in a reaction kettle and reacted at 130°C for 15 h. After the reaction, the reaction kettle was naturally cooled to room temperature. The obtained precipitate was washed 4 times with deionized water and ethanol respectively. After centrifugation, it was dried at 60°C for 12 h. , to prepare SnO ???? Powder. Disperse 0.5 g of SnO powder prepared above in 20 ml containing 0.32 g Zn(CH 3 COO) 2 · 2H 2 O aqueous solution, after ultrasonic treatment for 10 min, the solvent was distilled off under reduced pressure to obtain ZnO / SnO 2 Precursors for nanocomposites. ZnO / SnO obtained in air atmosphere 2 The nanocomposit...

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Abstract

The invention provides a ZnO / SnO2 nano composite gas-sensitive material with a flower-shaped grading structure. The ZnO / SnO2 nano composite gas-sensitive material is prepared by the following steps: dripping a sodium hydroxide water solution into an ethanol solution of cetyl trimethyl ammonium bromide and stannous chloride dihydrate under electromagnetic stirring; after dripping, preparing a precursor solution by the continuous electromagnetic stirring; adding the precursor solution into a reaction kettle, reacting at 130 DEG C; carrying out centrifuging on a reactant, washing and drying to obtain a flower-shaped stannous oxide sacrifice template; adding the flower-shaped stannous oxide sacrifice template into a zinc acetate solution; agitating and carrying out ultrasonic treatment; removing a solvent to obtain a ZnO / SnO2 precursor; and carrying out heat preservation on the ZnO / SnO2 precursor for 2-4 hours in an air atmosphere of 700 DEG to obtain the composite gas-sensitive material. According to the ZnO / SnO2 nano composite gas-sensitive material with the flower-shaped grading structure, the controllable preparation of the composite gas-sensitive material on the appearance and components can be realized; the mass percent content of zinc oxide in the composite gas-sensitive material is 5%-15%; a flower shape is assembled by sheet-shaped tin dioxide and zinc oxide nano particles; the ZnO / SnO2 nano composite gas-sensitive material has a good gas sensitive performance and has a wide application prospect in the aspect of manufacturing a novel high-efficient gas sensor.

Description

technical field [0001] The invention relates to a nanocomposite material, specifically a flower-like hierarchical structure zinc oxide / tin dioxide (ZnO / SnO 2 ) nanocomposite gas sensitive material and its preparation method. Background technique [0002] Rapid and accurate detection of toxic and harmful gases in the environment is of great significance to environmental protection. Gas sensors based on metal-oxide-semiconductor gas-sensing materials have become an important means of gas detection due to their high sensitivity, fast response, simple manufacturing method, small size, and low price. Metal-oxide-semiconductor gas-sensing materials are the core components of this type of gas sensor, and their gas-sensitivity properties directly affect the performance and application of gas sensors. Therefore, the design and preparation of new metal oxide semiconductor materials with high-efficiency gas sensing performance is of great significance to improve the performance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00B82Y15/00B82Y40/00B82Y30/00
Inventor 孙广李彦伟戚凤晓张赛赛曹建亮王燕付乌有孟哈日巴拉张战营
Owner HENAN POLYTECHNIC UNIV
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