Low Temperature Chemoresistive Oxygen Sensors Based on Titanium-Containing Ti2CTx and Ti3C2Tx MXenes

The chemoresistive properties of multilayer titanium-containing Ti2CTx and Ti3C2Tx MXenes, synthesized by etching the corresponding MAX phases with NaF solution in hydrochloric acid, and the composites based on them, obtained by partial oxidation directly in a sensor cell in an air flow at 150 °C, w...

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Bibliographic Details
Published in:Materials 2023-06, Vol.16 (13), p.4506
Main Authors: Simonenko, Elizaveta P., Nagornov, Ilya A., Mokrushin, Artem S., Kashevsky, Sergey V., Gorban, Yulia M., Simonenko, Tatiana L., Simonenko, Nikolay P., Kuznetsov, Nikolay T.
Format: Article
Language:English
Subjects:
Air flow
Aluminum
Ammonia
Composite materials
Fluorides
Functional groups
Gases
Hydrochloric acid
Low temperature
Multilayers
MXenes
Nitrogen dioxide
Oxidation
Oxygen probes
Semiconductors
Sensitivity
Sensors
Temperature
Titanium
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Summary:The chemoresistive properties of multilayer titanium-containing Ti2CTx and Ti3C2Tx MXenes, synthesized by etching the corresponding MAX phases with NaF solution in hydrochloric acid, and the composites based on them, obtained by partial oxidation directly in a sensor cell in an air flow at 150 °C, were studied. Significant differences were observed for the initial MXenes, both in microstructure and in the composition of surface functional groups, as well as in gas sensitivity. For single Ti2CTx and Ti3C2Tx MXenes, significant responses to oxygen and ammonia were observed. For their partial oxidation at a moderate temperature of 150 °C, a high humidity sensitivity (T, RH = 55%) is observed for Ti2CTx and a high and selective response to oxygen for Ti3C2Tx at 125 °C (RH = 0%). Overall, these titanium-containing MXenes and composites based on them are considered promising as receptor materials for low temperature oxygen sensors.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16134506