Table 2 Comparison of gas-sensing properties for methanol gas of various metal oxides with different morphologies
Sensing materials | Conc. (ppm) | R methanol | Tsens (°C) | Ref. |
|---|---|---|---|---|
SnO2/ZnO | 50 | 23 | 350 | [27] |
In/W ellipsoidal nanospheres | 400 | 12 | 312 | [28] |
Ag-doped ZnO thin films | 500 | 1.44 | 275 | [29] |
Co3O4 | 100 | 12 | 220 | [30] |
CeO2-decorated SnO2 hollow spheres | 100 | 23.4 | 225 | [31] |
In2O3/CuO bilayer porous thin film | 1000 | 2.9 | 250 | [32] |
Pd-WO3 | 10 | 32 | 350 | [33] |
Sm2O3/ZnO/SmFeO3 microsphere | 5 | 120 | 195 | This work |