Microstructure control of WO3 film by adding nano-particles of SnO2 for NO2 detection in ppb level

ppb level detection of NO2 using a WO3 thin film-based sensor: material optimization, device fabrication and packaging

“…[7][8][9][10][11][12][13][14] It can be understood that by controlling the microstructure shape and size of the WO 3 lm, the ppb level detection of NO 2 can be achieved. [15][16][17][18][19][20] In addition, not only an optimum sensing layer thickness helps to achieve a high response to test a gas but also the sensor operating conditions play an important role to dene the overall sensor performance. In the past decade, WO 3 nanostructures with large surface-tovolume ratios have been considered for gas sensing applications.…”

Porous WO3 with enhanced photocatalytic and selective gas sensing properties

“…25,26 The third approach is doping metal oxide in WO 3 ; in Shimanoe's work, they synthesized SnO 2 doped WO 3 films and studied the sensitivity to NO 2 in the ppb level. 27 Since Kawi and co-workers have demonstrated that increasing the BET surface area of the sample could improve the sensor response, 28,29 a great deal of attention has been concentrated on synthesizing porous materials to obtain enhanced surface area. Thus, it was possible for us to prepare porous WO 3 with large BET surface area and use it as a potential gas sensor and photocatalyst.…”

Synthesis of 1D ZnO Crystals and Sensing Properties for ${\rm NO}_{2}$ Gas

“…The calcination temperature of the sensing material is also an important factor for sensor performance [13]. Generally, the calcination temperature for metal oxides of 1D nanocrystals were lower than bulk materials, the calcination times were also shorter than zero dimension materials.…”

“…Introduction of additives into base metal oxides can significantly change sensing properties of materials [13]- [15]. The sensor response was further enhanced by doping Cd of metal element.…”