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Table 2 Comparison of gas-sensing properties for methanol gas of various metal oxides with different morphologies

From: High Methanol Gas-Sensing Performance of Sm2O3/ZnO/SmFeO3 Microspheres Synthesized Via a Hydrothermal Method

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