H2S sensing properties of La-doped nanocrystalline In2O3

Ultrasensitive and ultraselective detection of H2S using electrospun CuO-loaded In2O3 nanofiber sensors assisted by pulse heating

“…To date, the metal-oxide semiconductors explored and used as H 2 S sensors include SnO 2 [16], ZnO [17,18], In 2 O 3 [19][20][21][22], WO 3 [23], and Fe 2 O 3 [24]. The H 2 S sensing characteristics were enhanced by altering the design of corresponding nanostructures or by the addition of catalytic additives.…”

Assembly of Pt nanoparticles on electrospun In2O3 nanofibers for H2S detection

“…Recently, many semiconductive oxides have been widely investigated as sensing materials for H 2 S detection [1][2][3][4][5]. Among them, Indium oxide (In 2 O 3 ), which is a wide band-gap n-type semiconductor, has been considered as a promising sensing material of solid-state semiconductor gas sensors for H 2 S detection because of its excellent sensitivity [6][7][8]. However, most of reports focused on the sensors based on In 2 O 3 thin films or powder, which usually suffer from some critical limitations such as high power consumption, limited sensitivity and poor selectivity.…”

Effect of terbium doping on structural, optical and gas sensing properties of In2O3 nanoparticles

“…The small crystallite size and large lattice distortion is beneficial for interaction between gas and material surface. This leads to high sensor response [9]. (ii) Rare earth oxides are basic oxides and can promote the basicity of the surface due to which response towards reducing VOCs (like ethanol, methanol, acetone) and ammonia increases as explained below.…”

“…Thereafter, the surface reactions between preadsorbed surface oxygen species and reducing test gases take place which result in decrease in the electrical resistance of SMO gas sensor. Hence, by monitoring the change of electrical resistance, the test gas can be detected [8,9]. The particle size, surface morphology and active centers are the key parameters that control the sensing properties of gas sensors [10].…”