Table 1.

Comparison of the sensing performance of various gas sensors toward NH₃.

Material	Conc.	Res. a	Res./Rec. Time (s)	Temp. (°C)	Ref.
TiO2/Ti3C2Tx	10 ppm	3.1%	33/277	RT	[5]
WS2	250 ppm	2.5%	200/412	RT	[46]
ZnO	3 ppm	44%	15/14	250	[47]
ZnO/rGO	10 ppm	1.2%	78/84	RT	[48]
Mn-ZnO	20 ppm	7%	4/10	150	[15]
Y-doped ZnO	150 ppm	66%	58/87	250	[16]
ZnO/CBC	25 ppm	9.2%	154/254	RT	This work

^a Response defined as (Rgas − Rair)/Rair × 100%.