Nanocrystalline In2O3-based H2S sensors operable at low temperatures

Assembly of Pt nanoparticles on electrospun In2O3 nanofibers for H2S detection

“…When the sensor is exposed H 2 S gas, the strong reducing gas might react with oxygen ions on the surface and put back the electrons into In 2 O 3 semiconductor, resulting in the increasing of conductance of In 2 O 3 nanofibers. The mechanism is similar to the previous report [6]. The surface reactions between the H 2 S and the oxygen species can be described as H 2 S þ 3O 2À ðadsÞ !…”

“…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.…”

Fabrication of NOx gas sensors using In2O3–ZnO composite films

“…Among the materials used, In 2 O 3 is known to be sensitive to some oxidizing gases, such as NO x [5][6][7][8]16] and ozone [9,10]. In order to improve the sensor sensitivity, nanostructured In 2 O 3 [11,12] or binary oxide films [13,14] have been used. On the other hand, zinc oxide (ZnO) also has been proposed as a sensing material for the detection of some pollutants [15,16].…”

Liquid petroleum gas sensing performance enhanced by CuO modification of nanocrystalline ZnO-TiO2

“…have been investigated for the detection of gases [13][14][15]. However, very few of them are suitable to fulfil all the requirements.…”