NAP-XPS study of surface chemistry of CO and ethanol sensing with WO3 nanowires-based gas sensor
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F23%3APU149814" target="_blank" >RIV/00216305:26220/23:PU149814 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/23:10476010 RIV/60461373:22340/23:43928270
Result on the web
<a href="https://pdf.sciencedirectassets.com/271353/1-s2.0-S0925400523X00197/1-s2.0-S0925400523013977/main.pdf?X-Amz-Security-Token=IQoJb3JpZ2luX2VjEDgaCXVzLWVhc3QtMSJHMEUCIF0yjbsz%2B39qI3sCrMMpzbGeLRXbq0X%2BUbzWC10BZECFAiEA2i8DHcyMp74xgF3rL5bmJPKKDvMcxkTnzb%2B9z" target="_blank" >https://pdf.sciencedirectassets.com/271353/1-s2.0-S0925400523X00197/1-s2.0-S0925400523013977/main.pdf?X-Amz-Security-Token=IQoJb3JpZ2luX2VjEDgaCXVzLWVhc3QtMSJHMEUCIF0yjbsz%2B39qI3sCrMMpzbGeLRXbq0X%2BUbzWC10BZECFAiEA2i8DHcyMp74xgF3rL5bmJPKKDvMcxkTnzb%2B9z</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.snb.2023.134682" target="_blank" >10.1016/j.snb.2023.134682</a>
Alternative languages
Result language
angličtina
Original language name
NAP-XPS study of surface chemistry of CO and ethanol sensing with WO3 nanowires-based gas sensor
Original language description
The nanowires prepared on a commercial Al2O3-based sensor platform were studied by near ambient pressure Xray photoelectron spectroscopy (NAP-XPS) upon detecting CO and ethanol. Our findings indicated that the exsitu prepared WO3 NWs-based gas sensor might not be suitable for NAP-XPS studies, as the surfaces tend to accumulate significant carbon contamination, which remains on the surface even after long-term annealing in mbar range oxygen atmosphere at 593 K. To address this challenge, we developed a methodology involving exposure of the sensor to NOx, which effectively cleans the surface and enables the detection of subtle chemical changes upon exposure to various carbon-containing analytes. Using NAP-XPS analysis, we investigated the gas sensing mechanisms of WO3 NWs for CO and ethanol at different temperatures, revealing that it might combine several mechanisms commonly observed in metal-oxide chemiresistors. It is shown that the response to CO rather arises from the quick interaction of CO molecules with the ionosorbed oxygen. In the case of ethanol sensing, the main driving force for the sensor macroscopic electrical response at low temperatures is the adsorption of ethanol molecules. In contrast, at high temperatures, it combines the adsorption of ethoxy groups with the strong reducing effect of EtOH on the WO3 surface.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10400 - Chemical sciences
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Sensors and Actuators B: Chemical
ISSN
0925-4005
e-ISSN
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Volume of the periodical
397
Issue of the periodical within the volume
Prosinec 2023
Country of publishing house
CH - SWITZERLAND
Number of pages
12
Pages from-to
1-12
UT code for WoS article
001097595200001
EID of the result in the Scopus database
2-s2.0-85172767941