Spectroscopic insights into CO sensing of undoped and palladium doped tin dioxide sensors derived from hydrothermally treated tin oxide sol

Selectivity Modification of SnO2‐Based Materials for Gas Sensor Arrays

“…This implies on different nature of chemical mechanism, responsible for gas sensing in this case. According to [7] in this case the process involves surface adsorbed water molecules and rooted hydroxyl groups. The scheme of chemical reaction in this case could be written in the following manner:…”

Influence of annealing temperature on the CO sensing mechanism for tin dioxide based sensors–Operando studies

“…Recently, having catalytic and sensing application in mind, Amalric-Popescu and Bozon-Verduraz [4] after thoroughly reviewing the available literature made an attempt to establish the present state of the art in the field of the influence of the pre-treatment (temperature, oxygen background) on the properties of tin dioxide powders. However, experiments have always been performed under static conditions (exposure) or after outgassing/evacuation, which mismatches with the optimal conditions for measuring sensors performance.DRIFT experiments have been already performed in the past for the characterisation in real conditions of powders [5][6][7][8] and of real sensors; the latter were even performed at sensors' working temperatures [9][10][11][12]. Generally, during the gas sensing process with metal oxide based sensors the determining factors are the different ways by which charge carriers are exchanged with the conduction band of the sensing material because of the usual manner in which the effects are recorded, id est by measuring the resistance changes upon gas exposure [13].…”

The mechanism of the formation of selective response of semiconductor gas sensor in mixture of CH4/H2/CO with air

“…The influence of humidity on the detection of CH 4 and H 2 is smaller. These gases do not react with H 2 O at our temperatures, therefore, the influence of humidity is additive and is due, probably, to direct interaction of water with SnO 2 .…”