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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]