Table 3.
Electrospun-based metal oxide gas sensors modified with noble metals.
| Material | Dopant | Analyte gas | C, ppm | T, (°C) | Response | Detection Limit | Res./Rec. Time, s | Ref. |
|---|---|---|---|---|---|---|---|---|
| SnO2 | Pd | Acetone | 100 | 275 | 99 | 1 ppm | - | [209] |
| SnO2 | Formaldehyde | 100 | 160 | 19 | - | 2/7 | [210] | |
| In2O3 | Ethanol | 50 | 200 | 18 | 1 ppm | 1/10 | [130] | |
| ZnO | CO | 20 | 220 | 5.5 | 1 ppm | 27/15 | [211] | |
| TiO2 | NO2 | 2.1 | 180 | 38 | 0.16 ppm | - | [212] | |
| WO3 | H2S | 1 | 350 | 1.4 | 1 ppm | - | [213] | |
| WO3 | Toluene | 1 | 350 | 5.5 | 20 ppb | 119/16 | [213] | |
| WO3 | Pt | Acetone | 2 | 350 | 4 | 120 ppb | - | [214] |
| α-Fe2O3 | H2S | 10 | 175 | 157 | - | [215] | ||
| NiO | Ethanol | 100 | 400 | 12 | 1 ppm | - | [216] | |
| In2O3 | H2S | 600 | 200 | 1490 | 50 ppm | 60/120 | [196] | |
| SnO2 | H2S | 20 | 300 | 5100 | - | - | [192] | |
| SnO2 | Toluene | 10 | 300 | 12 | 1 ppm | - | [217] | |
| SnO2 | Ag | Acetone | 200 | 160 | 117 | 5 ppm | 6/10 | [218] |
| TiO2 | H2S | 1 | 350 | 120 | 1 ppm | - | [219] | |
| In2O3 | Formaldehyde | 50 | 115 | 28 | 5 ppm | 5/10 | [220] | |
| SnO2 | Au | CO | 10 | 300 | 19 | 1 ppm | - | [221] |
| SnO2 | CO | 5 | 300 | 84 | - | 22/235 | [189] | |
| In2O3 | Ethanol | 500 | 140 | 14 | 50 ppm | 12/24 | [222] | |
| WO3 | n-butanol | 100 | 250 | 230 | 1 ppm | 5–43/10–122 | [223] |