| Material | Structure | Treatment | Average Diameter | Target gas | Concentration | Response | T response/ T recovery | Temperature(℃) | Limit of detection | ref |
|---|---|---|---|---|---|---|---|---|---|---|
| CuO-RGO | Nanofibers | Calcined at 600 ℃ for 2 h | ~50 nm | H2S | 0.01‰ | 11.2 | - | 300 | 0.001‰ | 131 |
| GO-WO3 | Nanofibers | Calcined at 500 ℃ for 2 h | 100 nm | Acetone | 0.1‰ | 35.9 | 4/11 s | 375 | 0.02‰ | 132 |
| rGO-In2O3 | Nanofibers | Calcined at 450 ℃ for 3 h | - | NO2 | 0.005‰ | 42 | 261/698 s | 50 | 0.001‰ | 133 |
| rGO-Co3O4 | Nanofibers | Calcined at 550 ℃ for 3 h in N2 | - | Ammonia | 0.05‰ | 53.6% | 4 s/5 min | RT | 0.005‰ | 134 |
| Au-rGO/ZnO | Nanofibers | Calcined at 600 ℃ | - | CO | 0.005‰ | 35.8 | 177.3/76.1 s | 400 | 0.001‰ | 135 |
| Pd-rGO/ZnO | Nanofibers | for 3 min | - | C6H6 | 0.005‰ | 23 | 110.3/318.2 s | |||
| rGO/α-Fe2O3 | Nanofibers | Calcined at 500 ℃ for 2 h | 100 nm | Acetone | 0.1‰ | 8.9 | 25/30 s | 375 | 0.005‰ | 136 |
Fig.4 (a) Schematic illustration of synthetic process of PdO@ZnO-SnO2 NTs; (b) SEM image of as-spun Pd@ZIF-8/PVP/Sn composite NFs;(c) TEM image of as-spun Pd@ZIF-8/PVP/Sn composite NFs;(d) SEM image of PdO@ZnO-SnO2 NTs;(e) Dynamic acetone response transition in the concentration range of 0.0001‰~0.005‰ at 400 ℃; (f) selective sensing characteristics of PdO@ZnO-SnO2 NTs toward 0.001‰ of various analytes at 400 ℃ [