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Stannic oxide-loaded porous nickel oxide gas sensor material as well as preparation and application thereof

A tin oxide and sensor technology, applied in the field of material chemistry, can solve the problems of low sensitivity and poor selectivity, and achieve the effect of high adsorption area

Inactive Publication Date: 2016-10-12
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gas-sensing performance of a single nickel oxide material is controlled by the material's morphology, crystal form, specific surface area, energy band structure, etc. Although the research in this area has made great progress, there are still low sensitivity and poor selectivity. shortcoming

Method used

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  • Stannic oxide-loaded porous nickel oxide gas sensor material as well as preparation and application thereof
  • Stannic oxide-loaded porous nickel oxide gas sensor material as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 2mol / L sodium hydroxide and 0.05mol / l tetrahydroxy nickel into deionized water, stir evenly, then transfer the mixed solution into a hydrothermal reaction kettle with polytetrafluoroethylene, tighten the seal, and put it in 100 o C static reaction in a constant temperature oven for 12 hours; the reaction product was repeatedly washed with deionized water until the pH value was 7~8; then washed with hydrochloric acid for 4 to 5 times; o After drying in the oven of C, porous nickel oxide spherical particles were obtained; the obtained nickel hydroxide was ultrasonically dispersed in an aqueous solution of 0.01 mol / l ammonium fluorostannate, the molar ratio of tin to nickel was 1:2, and stirred for 3 hours, Wash alternately with deionized water and ethanol at 50 o Dry in an oven at C, add n-butanol at 80 o C removes the water in the hydroxide to obtain the porous nickel oxide gas sensor material supported by tin oxide, see figure 1 ; Disperse the obtained powder on ...

Embodiment 2

[0021] Add 10mol / L sodium hydroxide and 0.2mol / lα-diimine metal nickel into deionized water, stir evenly, then transfer the mixed solution into a hydrothermal reaction kettle with polytetrafluoroethylene, tighten the seal, and put it in 160 o C static reaction in a constant temperature oven for 6 hours; the reaction product was repeatedly washed with deionized water until the pH value was 7~8; then washed with hydrochloric acid for 4 to 5 times; o After drying in the oven of C, porous nickel oxide spherical particles were obtained; the obtained nickel hydroxide was ultrasonically dispersed in 0.05 mol / l ammonium fluorostannate aqueous solution, the molar ratio of tin to nickel was 1:6, stirred for 3 hours, Wash alternately with deionized water and ethanol at 70 o Dry in an oven at C, add n-butanol, at 95 o C removes the water in the hydroxide to obtain the porous nickel oxide gas sensor material supported by tin oxide; the obtained powder is dispersed and coated on the hexapo...

Embodiment 3

[0023] Add 5mol / L sodium hydroxide and 0.1mol / l nickel sulfamate into deionized water, stir evenly, then transfer the mixed solution into a hydrothermal reaction kettle with polytetrafluoroethylene, tighten the seal, and put it in 130 o C static reaction in a constant temperature oven for 9 hours; the reaction product was repeatedly washed with deionized water until the pH value was 7~8; then washed with hydrochloric acid for 4 to 5 times; o After drying in the oven of C, porous nickel hydroxide spherical particles were obtained; the obtained nickel hydroxide was ultrasonically dispersed into an aqueous solution of 0.03 mol / l stannous oxalate, the molar ratio of tin to nickel was 1:4, and stirred for 3 hours, Wash alternately with deionized water and ethanol at 60 o Dry in an oven of C, add n-butanol, at 90 o C removes the water in the hydroxide to obtain the porous nickel oxide gas sensor material supported by tin oxide; the obtained powder is dispersed and coated on the hex...

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Abstract

The invention relates to a stannic oxide-loaded porous nickel oxide gas sensor material as well as preparation and application thereof. Alkali and an inorganic salt containing nickel are added into a hydrothermal reaction kettle to carry out a thermostatic reaction; porous nickel oxide ball particles are obtained from the an obtained product through cleaning, acidizing, washing and drying; the obtained porous nickel oxide ball particles are dispersed into an aqueous solution of water soluble stannate, n-butyl alcohol is added, and water in hydroxide is removed at the azeotropy point, so that the stannic oxide-loaded porous nickel oxide gas sensor material is obtained. The raw materials are cheap, well crystalized stannic hydroxide is evenly modified and loaded on nickel hydroxide at the normal temperature, dehydration is performed with the azeotropy technique, the structure and the morphology of the material can be stably controlled, and the limit of detection of gas is 1ppm or lower. Besides the field of gas sensors, the stannic oxide-loaded porous nickel oxide gas sensor material can also be applied to the fields of solar cells, photocatalysts and the like.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and relates to a chemical preparation method of a tin oxide-loaded porous nickel oxide gas-sensitive sensing material. Background technique [0002] Due to the adjustable pore structure, high specific surface area and strong ion exchange performance of porous nickel oxide materials, it is beneficial for the reactants to react at the active site during the catalytic process, and the H 2 The detection of S, ethanol, acetone, formaldehyde and other gases has shown great application prospects, so nickel oxide porous structure materials are widely used as sensitive materials for gas sensors. However, the gas-sensing performance of a single nickel oxide material is controlled by the material's morphology, crystal form, specific surface area, energy band structure, etc. Although the research in this area has made great progress, there are still low sensitivity and poor selectivity. shortcomi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/0027
Inventor 何丹农张芳林琳葛美英张春明金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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