Table 1 Recent reported researches of the NO2 gas sensor.
Sensing material | Fabrication method | Temp | Concentration range | Response | LO | References |
|---|---|---|---|---|---|---|
PbS films | Bath growing | RT | 5–100 ppm | 0.5 | – | |
PbS NPs | SILAR technsique | RT | 10–100 ppm | 0.1 | – | |
PbS CQDs | Drop casting | RT | 2.8–100 ppm | 0.21 | 0.15 ppb | |
MoS2/PbS CQDs | Hydrothermal & Drop casting | RT | 5–400 ppm | 0.11 | – | |
MoS2/PbS CQDs | Hydrothermal & Spin coating | RT | 1–20 ppm | 6.1 | 94 ppb | |
PbS films | PLD | 150 °C | 10–70 ppm | 0.1 | 84 ppb | |
MoS2@MoO3 | PVD | 125 °C | 0.5–10 ppm | 0.3 | 150 ppb | |
In2O3-graphene-Cu | Sol–gel &Drop casting | 420 °C | 7–20 ppm | 1.66 | – | |
MOF In2O3 | Hydrothermal & Calcination | RT | 1–1000 ppb | 1210 (200 ppb) | 1 ppb | |
P3HT/PbS CQDs | Sol–gel & Spin coating | RT | 0.4–100 ppm | 2.17 | 70 ppb | This work |
