Table 6.

Dopants used for optimization of nanofiber-based gas sensors’ response to specific analyte gas.

Material	Dopant	Analyte Gas	Toper., °C	Ref.
SnO2	Y; Ni	Acetone	300–340	[157,158,159]
ZnO	Ce; Mn; Co; La		230–360	[160,161,162,163,164]
WO3	La; Cu		300–350	[165,166]
In2O3	Eu		240	[167]
α-Fe2O3	La; Nd; Sm; Ce; Ca		200–240	[168,169,170,171,172]
SnO2	Cu; Pr; Sr; Yb; Ce; Fe; Co	Ethanol	260–300	[173,174,175,176,177,178,179]
ZnO	In; Er; Al; Cr; Ce		240–300	[162,163,180,181,182]
In2O3	Co; Mg; Eu		250–300	[183,184,185]
α-Fe2O3	Ca; Sm; Nb		200–240	[172]
SnO2	Al	Formaldehyde	240	[186]
In2O3	Er; Nd; Sm		240–260	[187,188,189,190]
α-Fe2O3	Sn		220	[191]
ZnO	Ni	Acetylene	250	[192]
NiO	W	Xylene	375	[193]
SnO2	Al; Co	Hydrogen	330–340	[194,195]
SnO2	Cu	Hydrogen sulfide	125	[196]
ZnO	Cu		230	[197]
In2O3	V		90–150	[198]