Table 6.

Representative works based on combined mechanisms

Materials	Gas detection	Detection range	Work temperature	Refs.
Co3O4/PEI-CNTs	CO	5–1000 ppm	RT	[265]
HC(NH2)2SnI3/SnO2/Pt	HCHO	5–100 ppm	80 °C	[266]
PdO/SnO2/CuO	CO	100–2000 ppm	200 °C	[267]
Pd/ZnO/In2O3	H2	50–172 ppb	350 °C	[268]
rGO/ZnO/Pd	CH4	25–500 ppm	RT	[269]
Pt/ZnO/g-C3N4	Ethanol	0.5–50 ppm	250 °C	[270]
	NO2	0.5–15 ppm	150 °C
Au/Cu2O/ZnO	NO2	5–1000 ppb	RT	[271]
Ag/SnO2/rGO	Ethanol	100–2000 ppm	280 °C	[272]
TiO2/InVO4	NH3	10–1000 ppm	250 °C	[273]
Pd–SnO2/rGO	CH4	800–1200 ppm	RT	[274]
Au@In2O3@PANI	NH3	0.5–100 ppm	RT	[275]
Au–ZnO@ZIF-DMBIM	Acetone	0.0001–1000 ppm	RT	[203]
SnO2/α-Fe2O3/Pt	Styrene	0.25–1.25 ppm	206 °C	[276]