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Resistance type NO2 sensor based on stannic oxide modified zinc oxide nanometer material, and manufacture method thereof

A zinc oxide nanometer and tin dioxide technology, which is applied in the analysis of materials, material resistance, and material analysis through electromagnetic means, can solve the problem of interference sensitivity, the small number of surface active sites of pure zinc oxide, and poor sensitivity and other problems, to achieve the effect of simple manufacturing process, excellent gas-sensing characteristics, and high sensitivity

Inactive Publication Date: 2019-07-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although zinc oxide, as a typical n-type semiconductor material, is widely used in the construction of different types of gas sensors, the pure state of zinc oxide has a small number of surface active sites. 2 The sensitive performance is poor, especially the organic volatiles seriously interfere with its sensitive performance

Method used

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  • Resistance type NO2 sensor based on stannic oxide modified zinc oxide nanometer material, and manufacture method thereof
  • Resistance type NO2 sensor based on stannic oxide modified zinc oxide nanometer material, and manufacture method thereof
  • Resistance type NO2 sensor based on stannic oxide modified zinc oxide nanometer material, and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) 1g of zinc oxide powder was heat-treated at 60°C for 12h under vacuum conditions;

[0031] (2) Add the zinc oxide powder in (1) to the toluene solution, the volume of toluene is 50mL, and ultrasonically disperse it evenly; then add 0.2g dimethyl tin dichloride to the above solution, and stir at room temperature for 0.5h , to obtain a mixed solution of dimethyl tin dichloride and zinc oxide;

[0032] (3) Add 4 mL of triethylamine to the mixed solution of dimethyl tin dichloride and zinc oxide in (2), and continue to stir at room temperature for 2 hours; the above solution is centrifuged, washed with ethanol, and dried to obtain organostanane-modified Zinc oxide material;

[0033] (4) calcining the zinc oxide material modified by organostannane prepared in (3) at a temperature of 500° C. for 2 hours to obtain a surface functionalized zinc oxide material;

[0034] (5) The surface functionalized zinc oxide powder prepared in step (4) is mixed with deionized water in a...

Embodiment 2

[0037] (1) 2g of zinc oxide powder was heat-treated at 60°C for 12h under vacuum conditions;

[0038] (2) Add the zinc oxide powder in (1) to the toluene solution, the volume of toluene is 50mL, and ultrasonically disperse it evenly; then add 0.4g dimethyl tin dichloride to the above solution, and stir at room temperature for 0.5h , to obtain a mixed solution of dimethyl tin dichloride and zinc oxide;

[0039] (3) Add 4 mL of triethylamine to the mixed solution of dimethyl tin dichloride and zinc oxide in (2), and continue to stir at room temperature for 2 hours; the above solution is centrifuged, washed with ethanol, and dried to obtain organostanane-modified Zinc oxide material;

[0040] (4) calcining the zinc oxide material modified by organostannane prepared in (3) at a temperature of 500° C. for 2 hours to obtain a surface functionalized zinc oxide material;

[0041] (5) The surface functionalized zinc oxide powder prepared in step (4) is mixed with deionized water in a...

Embodiment 3

[0044] (1) 3g of zinc oxide powder was heat-treated at 70°C for 18h under vacuum conditions;

[0045] (2) Add the zinc oxide powder in (1) to the toluene solution, the volume of toluene is 60mL, and ultrasonically disperse it evenly; then add 0.5g dimethyl tin dichloride to the above solution, and stir at room temperature for 0.5h , to obtain a mixed solution of dimethyl tin dichloride and zinc oxide;

[0046] (3) Add 5 mL of triethylamine to the mixed solution of dimethyl tin dichloride and zinc oxide in (2), and continue to stir at room temperature for 3 hours; the above solution is centrifuged, washed with ethanol, and dried to obtain organotanane-modified Zinc oxide material;

[0047] (4) calcining the zinc oxide material modified by organostannane prepared in (3) at a temperature of 550° C. for 3 hours to obtain a surface functionalized zinc oxide material;

[0048] (5) The surface functionalized zinc oxide powder prepared in step (4) is mixed with deionized water in a ...

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Abstract

The invention discloses a resistance type NO2 sensor based on a stannic oxide modified zinc oxide nanometer material, and a manufacture method thereof, and belongs to the technical field of gas sensors. The sensor is of a tubular structure and consists of an Al2O3 ceramic tube substrate, two parallel annular Au electrodes which are mutually discrete and are coated to the outer surface of the Al2O3ceramic tube substrate, a stannic oxide modified zinc oxide nanometer material gas sensitive thin film coated to the outer surface of the Al2O3 ceramic tube and the annular Au electrodes, and a nickel-chromium alloy heating coil which penetrates through the inner part of the nickel-chromium. The stannic oxide modified zinc oxide nanometer material of which the surface is functionalized has excellent gas sensitive characteristics, including high sensitivity and a high response recovery rate, for NO2, and the problem that a pure-state zinc oxide gas sensor has poor sensitivity performance is solved. By use of the sensor, experiment parameters, including reaction temperatures, reaction time, the ratio of a reaction precursor and the like, can be controlled to indicate the regulation and control of the performance, including the composition, the structure and the like, of the functional zinc oxide material, and therefore, the performance of the sensor is improved.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a functionalized zinc oxide resistance type NO sensor with gas sensitive response characteristics. 2 Sensor and its manufacturing method, especially relate to a kind of resistive NO based on tin dioxide modified zinc oxide nanomaterial 2 Sensors and methods of making them. Background technique [0002] With the rapid development of industry, agriculture and transportation, the problem of environmental pollution has become more and more prominent. Especially with the continuous growth of car ownership, NO in the atmospheric environment 2 The higher and higher concentrations not only cause serious harm to the respiratory system of organisms, but also cause serious damage to the living environment of human beings. NO in the environment 2 Accurate and continuous detection has become an urgent problem to be solved, which provides a broad space for the application of gas sensor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12C04B41/87
CPCC04B41/009C04B41/505C04B41/87G01N27/127C04B41/5049C04B35/10
Inventor 刘森张彤费腾
Owner JILIN UNIV
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