Table 2.

Summarized pristine ZIF sensors and their sensing performances.

Analyte	Sample	Temp °C	Response (Ohms)	t/resp (mins)	t/recov (mins)	Ref
Formaldehyde	ZIF-67	150	13.9 at 100 ppm	–	–	[44]
Toluene	ZIF-67	180	1.1 at 90 ppm	150	–	[75]
Hydrogen	ZIF-8+ZIF-67	180	7.2 at 90 ppm	186	–	[75]
Hydrogen	ZIF-67	180	1.5 at 90 ppm	132	–	[75]

No value (−).