Fabrication of porous tin dioxide with enhanced gas-sensing performance toward NOx

A novel approach for preparing porous tin dioxide material by sol–gel hard template method was proposed in this study. The aerogel technology was used to synthesize the porous SnO 2 and improve the porosity. The prepared material possesses excellent gas-sensing performance to NO x at room temperatur...

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Bibliographic Details
Published in:Journal of materials science 2020-09, Vol.55 (26), p.11949-11958
Main Authors: Li, Tian-Tian, Xia, Long, Yu, Hui, Huang, Xiao-Xiao
Format: Article
Language:English
Subjects:
Aerogels
Characterization and Evaluation of Materials
Chemical Routes to Materials
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Dioxides
Gas sensors
Materials Science
Polymer Sciences
Porosity
Porous materials
Response time
Room temperature
Selectivity
Sol-gel processes
Solid Mechanics
Tin dioxide
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Summary:A novel approach for preparing porous tin dioxide material by sol–gel hard template method was proposed in this study. The aerogel technology was used to synthesize the porous SnO 2 and improve the porosity. The prepared material possesses excellent gas-sensing performance to NO x at room temperature, which has high sensitivity, excellent selectivity and fast response time. At room temperature, the maximum value toward 100 ppm NO x gas gets to 54%, and corresponding response time is only 19.5 s. The response time of the prepared sensor always remains within 26 s in NO x concentration ranging from 5 to 100 ppm. In the meantime, the response and response time for NO x at 5 ppm (the lowest detectable of the sensor) are 40% and 26 s, respectively. The prepared material can be used as a matrix material for gas-sensoring composites and has a very good development prospect in gas sensors’ field.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-020-04892-0