NiO-Based Gas Sensors for Ethanol Detection: Recent Progress

Table 1

Gas performance of NiO in different morphology.

Material	Morphology	Conc. (ppm)	Operating temp (°C)	Response	Response/recovery time (s/s)	LOD (ppm)	References
NiO	Nanosheets	100	130	68.1%	5/20	0.2	[53]
NiO	Nanosheets	80	300	1.51	-/-	—	[52]
NiO	Nanosheets	50	240	11.15	4/7	1	[51]
NiO	Nanoflower	200	300	25	1.7/2.2	—	[55]
NiO	Nanoflower	200	300	55	4.8/7	—	[55]
NiO	Nanoflower	150	200	35	3/6	2.6	[56]
NiO	Nanoflower	100	190	46	-/-	—	[58]
NiO	Hollow sphere	800	240	3.1	-/-	—	[73]