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Title: A New Insight into Cross-Sensitivity to Humidity of SnO2 Sensor

Journal Article · · Small
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  1. Univ. of Science and Technology Beijing, Beijing (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)

Abstract The efficiency of gas sensors varies enormously from fundamental study to practical application. This big gap comes mainly from the complex and unpredictable effect of atmospheric environment, especially in humidity. Here, the cross‐sensitivity to humidity of a SnO 2 sensor from local structural and lattice evolutions is studied. The sensing response of ethanol is found to be efficiently activated by adsorbing trace of water but inhibited as humidity increases. By X‐ray diffraction, pair distribution function of synchrotron and ab initio calculations, the independent effect of water and ethanol on lattice and local structure are clearly revealed, which elucidate the intricate sensing reactions. The formation of hydrogen bonds and repulsion of ethoxides play key roles in the structural distortions, and also in adsorption energies that are critical to the sensitive behavior. The results show the sensor performance coupled with local structural evolution, which provides a new insight into the controversial effects of humidity on SnO 2 sensors.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities
Grant/Contract Number:
AC02-06CH11357; AC02‐06CH11357
OSTI ID:
1471538
Alternate ID(s):
OSTI ID: 1418415
Journal Information:
Small, Vol. 14, Issue 13; ISSN 1613-6810
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Oxygen adsorption on ZrO2-loaded SnO2 gas sensors in humid atmosphere journal October 2018
Synthesis, structure, and gas sensing of icicle-like NiO/In2O3 nanocomposites journal July 2019
Growth mechanism of SnC 2 H 4 O 2 nanowires prepared by the polyol process as SnO 2 precursor nanowires journal January 2019
Heptazine based organic framework as a chemiresistive sensor for ammonia detection at room temperature journal January 2018
SnO 2 nanosheets with multifunctional properties for flexible gas-sensors and UVA light detectors journal July 2019

Figures / Tables (2)