Sensor materials

Con (ppm)

Selectivity

Gas response

Synthetic method

Ref.

Porous SnO₂ nanowires

100

ethanol

~1.7

EF, HM

[30]

GO/SnO₂ nanosheets

100

ethanol

2.9

HM

[31]

WO₃-SnO₂ nanosphere

1000

acetone

16.9

HM

[32]

La-doped SnO₂ nanoparticles

5

formaldehyde

4.2

BM

[33]

Porous flower-like SnO₂

100

formaldehyde, ethanol

24.8

HM

[34]

SnO₂ flower-shaped

100

formaldehyde

30.0

HM

this work