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Preparation method of NiO-modified tin dioxide nanomaterial for gas sensor, product obtained therethrough, and application of product

A gas sensor and nano-material technology, which is applied in the field of preparation of NiO-modified tin dioxide (SnO2) nano-materials, to achieve broad application prospects and improve stability

Inactive Publication Date: 2019-12-17
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the many methods of controlling defects, the use of metal oxide or noble metal doping can take advantage of the electronic and chemical superposition effect between the dopant and metal oxide to improve the sensitivity and response time of the material, and achieved good results.

Method used

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  • Preparation method of NiO-modified tin dioxide nanomaterial for gas sensor, product obtained therethrough, and application of product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A NiO-modified tin dioxide nanomaterial for gas sensor, using hydrothermal method to prepare SnO 2 Nanomaterials are used as carriers, modified by NiO, and prepared according to the following steps:

[0022] Take 0.5g of Ni(NO 3 ) 2 6H 2 O was dissolved in a mixed solution containing 14ml of ethanol and 6ml of ethylene glycol under magnetic stirring to obtain solution A; then,

[0023] 2.5 g nanorod SnO 2 Added to solution A, stirred for 20 minutes to obtain solution B;

[0024] Transfer solution B to a hydrothermal kettle and heat at 100°C for 5 hours, cool to room temperature, collect by centrifugation, wash with deionized water and ethanol for 3 times, and dry at 80°C to obtain powder C;

[0025] The powder C was calcined in a muffle furnace at 300° C. in air for 1 hour to obtain the final product NiO-modified tin dioxide nanomaterials for gas sensors.

[0026] The powder final product prepared in this example was dispersed on the hexapod ceramic tube gas senso...

Embodiment 2

[0028] A kind of NiO modified tin dioxide nanometer material that is used for gas sensor, other is similar to embodiment, is prepared according to the following steps:

[0029] Take 0.8g of Ni(NO 3 ) 2 6H 2 O was dissolved in a mixed solution containing 20ml of ethanol and 5ml of ethylene glycol under magnetic stirring to obtain solution A; then,

[0030] 2.4 g nanosheet SnO 2 Added to solution A, stirred for 20 minutes to obtain solution B;

[0031] Transfer solution B to a hydrothermal kettle and heat at 300°C for 8 hours, cool to room temperature, collect by centrifugation, wash with deionized water and ethanol three times, and dry at 80°C to obtain powder C;

[0032] The powder C was calcined in a muffle furnace at 600° C. in air for 3 hours to obtain the final product NiO-modified tin dioxide nanomaterials for gas sensors.

[0033] The powder final product prepared in the example is dispersedly coated on the gas sensor test element of the hexapod ceramic tube, and th...

Embodiment 3

[0035] A kind of NiO modified tin dioxide nanometer material that is used for gas sensor, other is similar to embodiment, is prepared according to the following steps:

[0036] Take 1gNi(NO 3 ) 2 6H 2 O was dissolved in a mixed solution containing 28ml of ethanol and 12ml of ethylene glycol under magnetic stirring to obtain solution A; then,

[0037] 2.5 g nanotube SnO 2 Added to solution A, stirred for 20 minutes to obtain solution B;

[0038] Transfer solution B to a hydrothermal kettle and heat at 200°C for 5 hours, cool to room temperature, collect by centrifugation, wash with deionized water and ethanol three times, and dry at 80°C to obtain powder C;

[0039] The powder C was calcined in a muffle furnace at 400° C. in air for 2 hours to obtain the final product NiO-modified tin dioxide nanomaterials for gas sensors.

[0040] The powder final product prepared in this example is dispersed and coated on the hexapod ceramic tube gas sensor test element, and the WS-30A g...

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Abstract

The invention discloses a preparation method of a NiO-modified tin dioxide nanomaterial for a gas sensor, a product obtained therethrough, and an application of the product. The preparation method ischaracterized in that a SnO2 nano material used as a carrier is prepared by using a hydrothermal process, and is modified with NiO. The preparation method comprises the following steps: dissolving Ni(NO3)26H2O in a mixed solution containing ethanol and ethylene glycol under a magnetic stirring condition to obtain a solution A; adding the SnO2 nanomaterial to the solution A under an ultrasonic stirring condition to obtain a solution B; transferring the solution B into a hydrothermal kettle, carrying out a hydrothermal reaction, cooling the obtained solution to room temperature, centrifuging thecooled solution, and collecting, washing and drying the obtained reaction product to obtain a powder C; and calcining the powder C in a muffle furnace to obtain the final product that is the NiO-modified tin dioxide nanomaterial for the gas sensor. The method can greatly improve the stability of SnO2, the sensitivity to methanol and the response time, so that the metal oxide system material has awide application prospect in the field of gas sensors.

Description

technical field [0001] The invention relates to the technical field of gas sensors, in particular to a NiO-modified tin dioxide (SnO 2 ) Preparation methods of nanomaterials and their products and applications. Background technique [0002] SnO 2 Due to the advantages of excellent performance, environmental friendliness, abundant resources, and low price, it is a widely studied gas-sensing material. The gas-sensing performance of the material can be improved by metal oxide surface modification, metal / noble metal modification and other processes, and it has a very wide range of applications in the field of gas sensors. [0003] Among various methods to improve the gas-sensing performance of materials, improving the gas-sensing performance of sensitive materials through metal oxide defect regulation is one of the most effective solutions. Among the many defect control methods, the use of metal oxide or noble metal doping can take advantage of the electronic and chemical sup...

Claims

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Application Information

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IPC IPC(8): C01G19/02C01G53/04B82Y40/00B82Y30/00G01N27/12
CPCB82Y30/00B82Y40/00C01G19/02C01G53/04C01P2004/13C01P2004/16C01P2004/17C01P2004/34G01N27/127
Inventor 王丹葛美英卢静
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH