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Emerging nanotechnologies improved solid-state sensors design and capabilities and enabled the use of semiconducting metal oxides-based gas sensors for new and increasingly demanding applications. Among them, ethanol monitoring is of great interest because it is an important chemical raw material widely used in chemical industry, medicine, paint and cosmetics. Water vapour is the most common interferent during operating conditions, affecting the baseline stability of sensors, and reducing their sensitivity and accuracy. In this work, a strategy based on the formation of stoichiometric solid solutions of Sn, Ti and Nb oxides have been sought to address humidity dependence of sensor signals and to enhance the sensing response vs. ethanol. Powders were synthesised through sol-gel technique, by keeping the Sn:Ti ratio constant at the optimal value for ethanol detection with different Nb concentrations (1.5 …
Publication date: 
1 Nov 2022

Elena Spagnoli, Barbara Fabbri, Andrea Gaiardo, Matteo Valt, Matteo Ardit, Soufiane Krik, Giuseppe Cruciani, Michele Della Ciana, Lia Vanzetti, Gabriele Vola, Francesco Di Benedetto, Andrea Migliori, Cesare Malagù, Vincenzo Guidi

Biblio References: 
Volume: 370 Pages: 132426
Sensors and Actuators B: Chemical