Table 1. Summary of Recent Research studies about the Graphene-Based NO2 Sensor at RT.
| sensing material | working temperature | LOD | sensitivity | reference |
|---|---|---|---|---|
| rGO/CuO | RT | 1 ppm | 14% ((Ig – Ia)/Ia) | (30) |
| rGO | RT | 50 ppb | (40) | |
| rGO/Ag NWs | RT | 50 ppm | 15% <keep-together>((Rg – RN2)/RN2)</keep-together> | (45) |
| Cu@CS/rGO | RT | 10 ppm | 16% (|Rg – Ra|/Ra) | (39) |
| rGONMFs | RT | 1 ppm | 13.6% (|Rg – R0|/R0) | (46) |
| Gr | RT | 100 ppb | 4% ((R – R0)/R0) | (20) |
| single-layered Gr | RT | 2.5 ppm | (23) | |
| ozone-treated Gr | RT | 1.3 ppb | (25) | |
| rGO/NiO | 200 °C | 1 ppm | 200% ((R – R0)/R0) | (47) |
| rGO + PVP | RT | 20 ppm | (48) | |
| printed rGO/S + Ag | RT | 50 ppm | 74.6% ((R – R0)/R0) | (49) |
| rGO/hydrazine + ZnO | RT | 5 ppm | 25.6% ((R – R0)/R0) | (50) |
| GO + Cs | RT | 90 ppb | (51) | |
| rGO/NaBH4 | RT | 5 ppm | 11.5% ((R – R0)/R0) | (52) |
| Gr/PS | RT | 45 ppb | 2% ((R – R0)/R0) | this work |