Table 1.

Typical performance of graphene based gas sensors

Target gasSensing materialLowest concentration testedDetection limit
NO2Mechanically exfoliated graphene (46)100 ppm
CVD graphene-like films (47)65 ppm
Ozone-treated graphene (48)200 ppm1.3 ppb
Ethylenediamine-modified rGO (49)1 ppm70 ppb
Sulfonated rGO (49)5 ppm3.6 ppm
Epitaxial graphene from SiC (50)2.5 ppm
MPECVD graphene (51)100 ppm
rGO (52)5 ppm
rGO (53)2 ppm
Carbon Nanotubes/rGO hybrid (54)0.5 ppm
Mechanically exfoliated graphene (55)1 ppmThe order of 1 ppb
CVD graphene (56)100 ppb100 ppb
CVD graphene (present work)8 ppb2.6 ppb
B-doped CVD graphene (present work)1 ppb95.2 ppt
NH3rGO (52)5 ppm
Mechanically exfoliated graphene (55)1 ppm
CVD graphene (57)65 ppm
rGO/polyaniline hybrid (58)5 ppm
Mechanically exfoliated graphene (59)10 ppm
rGO (60)20 ppm
CVD graphene (58)500 ppb500 ppb
rGO (61)10,000 ppm (1%)
rGO (53)10,000 ppm (1%)
CVD graphene (present work)20 ppm6.3 ppm
B-doped CVD graphene (present work)1 ppm59.9 ppb
  • MPECVD, microwave plasma enhanced CVD; rGO, reduced graphene oxide. Dashes indicated that no data are available.