Sensor

Detection potential/V

Detection Limit/uM

Ref.

3D CuO nanowire arrays

0.45

5.1

[12]

Nanoporous Au/CuO

0.4

2.8

[13]

3D porous Ni foam

0.45

2.2

[14]

CuO NWs

0.55

2

[15]

Hierarchical CuO nanoflowers

0.5

1.71

[16]

Porous CuO nanoflakes

0.45

1.7

This work