Tin Dioxide Sensors—Development and Applications

Function and applications of gas sensors

“…If the adsorption step or the subsequent dissociation rules the kinetics of the surface reaction and the conductance change, the sensor sensitivity correlates with the electronegativity. As an application of this consideration, an odour sensor for hydrogen disulfide has been developed [40]. The strong ionic binding of the sulphur (electronegativity 2.44) to the oxide metal atom weakens the sulphur-hydrogen bond and facilitates dissociation to an S 2− or an SH − ion and two or one H + ions.…”

Evolution in Structural and Optical Properties of Stannic Oxide Xerogel upon Heat Treatment

“…It has been used, for instance, as catalysts for oxidation of organics, 1-3 solid-state gas detectors, 4-6 transparent conductive glasses, and heat mirrors. 7,8 Its performance in these applications is known to depend heavily on the fabrication history, [1][2][3][4][5][6][7][8][9][10][11] which, in turn, has decisive effects on its structures, on both the nano-and micrometer scales. The sol-gel process has proved to be an attractive processing method for large-scale commercial fabrication of stannic oxide monoliths, films, and powders.…”

Sb‐SnO2‐Nanosized‐Based Resistive Sensors for NO2 Detection

“…Metal oxide semiconductors (MOSs) in the form of highly porous films are widely used in resistive chemical sensors for the monitoring of gaseous species in several applications of technological interest [1]. Tin oxide (SnO 2 ) is the most used sensing material in commercially sensor devices for toxic gases detection [2]. It is well known that the sensing properties of SnO 2 -based material depend on its chemical and physical characteristics, which are strongly dependent on the preparation conditions, dopant and grain size.…”