Table 1.
Comparison of sensing performances of our NO2 sensor with other published gas sensors based on micro-nano structured graphene-based materials.
| properties of sensing material | Preparation method | Tested gas (ppm) | Gas response | Operating temperature(°C) | Response time(τr/s) | Recovery time (τd/s) | Year of publication | Ref. |
|---|---|---|---|---|---|---|---|---|
| Aerographite | Chemical vapour deposition | CO2 (500) NH3 (100) H2 (10000) |
3.83% 1.21% 31.84% (ΔR/R0) |
RT RT RT |
3.98 8.7 0.25 |
6.92 11.58 0.35 |
2016 | 26 |
| 3D graphene foam network | Chemical vapour deposition | NH3 (1000) | 30% (ΔR/R0) |
RT | ~500 | ~800 | 2011 | 21 |
| 3D graphene/SnO2 | Freeze drying | NO2 (50) | 6% (ΔR/R0) |
RT | 190 | 224 | 2014 | 24 |
| 3D SnO2/RGO | Freeze drying | NO2 (100) | 1.079 (Ra/Rg) |
55 | >310a | 373 | 2015 | 25 |
| Graphene nanomesh | Nanosphere lithography | NO2 (10) | 11%a (ΔR/R0) |
RT | >300a | >300a | 2012 | 22 |
| RGO nanofibers | Electrostatic self-assembly | NO2 (4.5) | 20% (ΔR/R0) |
RT | >300a | >300a | 2014 | 23 |
| Porous Graphene Oxide Network | Steam Etched | NO2 (250) | 8% (ΔR/R0) |
RT | ~200a | ~400a | 2011 | 20 |
| This work | Two-beam-laser Interference | NO2 (4) NO2 (20) |
1.2 1.27 (Ra/Rg) |
RT | <10 10 |
<10 7 |
aEstimated from graphical plot.