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A sulfide ion-modified sno 2 base low temperature so 2 Sensitive material and preparation method thereof

A sensitive material, SO2 technology, applied in the direction of material resistance, material analysis, material analysis by electromagnetic means, etc., can solve the problem that the shape and particle size of tin disulfide cannot be well controlled, and achieve small particle size, resistance Reduced, good dispersion effect

Active Publication Date: 2020-09-29
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the morphology and particle size of tin disulfide in this method cannot be well controlled.

Method used

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  • A sulfide ion-modified sno <sub>2</sub> base low temperature so <sub>2</sub> Sensitive material and preparation method thereof
  • A sulfide ion-modified sno <sub>2</sub> base low temperature so <sub>2</sub> Sensitive material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] SnO surface modified by sulfide ion 2 low temperature SO 2 gas sensor

[0036] SnCl 4 ·5H 2 O, ethylenediaminetetraacetic acid and deionized water are mixed in a mass ratio of 1:0.1:15, wherein SnCl 4 ·5H 2 O is added in an amount of 10 g. Under the condition of magnetic stirring and water bath at 70°C, ammonia water was added dropwise until the solution pH=5. After the solution was cooled and left still, the precipitate was separated, washed and dried, and oxidized and roasted at 500°C for 3 hours to obtain SnO 2 nanomaterials; the SnO 2 Nanoparticles, glacial acetic acid, and thioacetamide were added to 80 g of deionized water in a mass ratio of 1:4:8, wherein SnO 2 The amount of nanoparticles added was 1 g, and after magnetic stirring for 30 min, the mixture was sealed and reacted at a constant temperature of 160° C. for 15 h. Then the precipitate was separated, washed and dried to obtain the SnO surface modified by sulfide ion 2 Base SO 2 Sensitive materi...

Embodiment 2

[0038] SnO surface modified by sulfide ion 2 low temperature SO 2 gas sensor

[0039] SnCl 4 ·5H 2 O, ethylenediaminetetraacetic acid and deionized water are mixed in a mass ratio of 1:0.2:15, wherein SnCl 4 ·5H 2 O is added in an amount of 10 g. Under the condition of magnetic stirring and water bath at 70°C, ammonia water was added dropwise until the solution pH=5. After the solution was cooled and left still, the precipitate was separated, washed and dried, and oxidized and roasted at 500°C for 3 hours to obtain SnO 2 nanomaterials; the SnO 2 Nanoparticles, glacial acetic acid, and thioacetamide were added to 80 g of deionized water in a mass ratio of 1:4:8, wherein SnO 2 The amount of nanoparticles added was 1 g, and after magnetic stirring for 30 min, the mixture was sealed and reacted at a constant temperature of 160° C. for 15 h. Then the precipitate was separated, washed and dried to obtain the SnO surface modified by sulfide ion 2 Base SO 2 Sensitive materi...

Embodiment 3

[0043] SnO surface modified by sulfide ion 2 low temperature SO 2 gas sensor

[0044] SnCl 4 ·5H 2 O, ethylenediaminetetraacetic acid and deionized water are mixed in a mass ratio of 1:0.3:15, wherein SnCl 4 ·5H 2 O is added in an amount of 10 g. Under the condition of magnetic stirring and water bath at 70°C, ammonia water was added dropwise until the solution pH=5. After the solution was cooled and left still, the precipitate was separated, washed and dried, and oxidized and roasted at 500°C for 3 hours to obtain SnO 2 nanomaterials; the SnO 2 Nanoparticles, glacial acetic acid, and thioacetamide were added to 80 g of deionized water in a mass ratio of 1:4:8, wherein SnO 2 The amount of nanoparticles added was 1 g, and after magnetic stirring for 30 min, the mixture was sealed and reacted at a constant temperature of 160° C. for 15 h. Then the precipitate was separated, washed and dried to obtain the SnO surface modified by sulfide ion 2 Base SO 2 Sensitive materi...

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Abstract

The invention provides a sulfide ion surface modified SnO 2 Preparation of low-temperature SO 2 As for the synthesis method of sensitive materials, the present invention first prepares SnO2 nanoparticles by the sol-gel method. The prepared SnO 2 Nanoparticles have small particle size (10-20nm) and good dispersion. Later, in this patent, the prepared nano-SnO 2 Surface modifications were made. Using hydrothermal method in SnO 2 The surface of the nanoparticles was doped with sulfur ions to prepare SnO surface-modified with sulfur ions. 2 sensitive materials. Able to implement SO 2 For low-temperature detection, the optimal detection temperature is determined by pure SnO 2 of 280℃ reduced to 180℃. And improve the SO 2 The response value of the gas shows good stability and response-recovery characteristics.

Description

technical field [0001] The invention belongs to the technical field of metal oxide semiconductor-based gas sensors and environmental monitoring, and in particular relates to a sulfide ion-modified SnO 2 low temperature SO 2 Sensitive materials and sensors and methods for their preparation. Background technique [0002] With the advancement of the world's modern industrialization process, the increasingly serious environmental pollution is a problem that people have to face. In the production process of chemical industry, coal, petroleum, natural gas and other fields, the leakage of flammable, explosive and toxic gases such as carbon monoxide, hydrogen sulfide and sulfur dioxide will have a great impact on the environment and safety production. Fires, poisoning, etc. that occur in daily life are also directly related to the leakage of these gases. For how to reduce the harm caused by these gases, in addition to controlling and reducing the emission of gases, accurate and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12B82Y15/00B82Y30/00
CPCB82Y15/00B82Y30/00G01N27/127
Inventor 徐浩元李建中付玉李培东
Owner NORTHEASTERN UNIV LIAONING
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