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Table 1 Comparison of the NO2 gas sensing properties of the present sensor (with specific surface area of 10.17 m2 g−1) with those of other ZnO-based gas sensors reported in the literature

From: Synthesis and gas sensing properties of membrane template-grown hollow ZnO nanowires

Sensor NO2 conc. (ppm) T (°C) Response (R a /R g ) References
Hollow ZnO NWs 0.1 400 15.5 This study
Hollow ZnO NWs 10 400 37.1 This study
Branched ZnO NWs 5 300 1.06 [19]
ZnO-decorated MWCNTs 10 300 1.023 [20]
ZnO/graphene nanocomposites 1 300 12.57 [21]
CNT-ZnO nanocomposite 20 250 1.19 [31]
SnO2-core/ZnO-shell NFs 5 300 1.5 [32]
SnO2–ZnO–Co NWs 10 300 7.48 [33]
Zn2SnO4/ZnO nanorods 1 300 1.70 [34]
ZnO brushes 50 300 1.2 [35]
ZnGa2O4-core/ZnO-shell NWs 1 250 2.6 [36]
ZnO nanoparticles 1 150 13.7 [30]
ZnO nanorods 50 225 35 [37]
ZnO nanorods 5 175 20 [38]
ZnO-reduced graphene oxide 5 25 2.5 [39]
Flower-like ZnO (4.9 m2 g−1) 100 25 12.27 [40]