Superior ethanol-sensing properties based on Ni-doped SnO2 p–n heterojunction hollow spheres

High triethylamine-sensing properties of NiO/SnO2 hollow sphere P–N heterojunction sensors

“…The generally accepted sensing mechanism for pure SnO 2 gas sensors has been well interpreted by the space-charge layer mode [4,[32][33][34]. The basic working principle of SnO 2 gas sensors depends on the variation of resistance, caused by the chemical adsorption and desorption of gas molecules.…”

Synthesis of ZnGa2O4 assisted by high-energy ball milling and its gas-sensing characteristics

“…Metal-oxide semiconductors (MOS) such as In 2 O 3 [5,6], WO 3 [7,8], and SnO 2 [9][10][11] have been widely chosen as sensing materials in the last decades for their high sensitivity to target gases and simplicity in fabrication. ZnO [12,13] and Ga 2 O 3 [14,15] have also received a great deal of research interest because of their superior sensing properties.…”

One-step synthesis of 3D flower-like Zn2SnO4 hierarchical nanostructures and their gas sensing properties

“…Zn 2 SnO 4 is a typical n-type semiconductor [27]. It is believed that the gas-sensing response and recovery process involves serial reactions: adsorptionoxidation-desorption [28,29]. When Zn 2 SnO 4 nanostructure is exposed to air, oxygen molecules are first adsorbed on the surface of semiconductor, trap free electrons from the conduction band of semiconductor to form chemisorbed oxygen species (O 2 À , O À , O 2 À ) [4,5,30,31].…”