Table 3.

Summary of the literature review of selected PhC and metal-oxide based sensors for acetone detection. The columns, from left to right, indicate the sensor’s material, the optimal operation temperature, the quantity of acetone (concentration) used for the test, the limit of detection (LOD), and the bibliographic reference. Adapted from [62].

Material	Temperature (°C)	Acetone (ppm)	LOD (ppm)	Reference
C3N4-SnO2	380	20	0.087	[63]
NiO/SnO2	300	50	0.01	[64]
WO3 3DIO *	370	5	0.1	[45]
TiO2/In2O3	250	10	0.1	[65]
CuFe2O4/α-Fe2O3	275	70	0.1	[66]
ZnO–Fe3O2 3DIO *	475	50	0.15	[46]
GO-SnO2-TiO2	200	5	0.25	[67]
Pt0.3Au0.7–In2O3	160	50	0.3	[68]
Co1−xZnx Fe2O4	650	50	0.3	[69]
WO3 NFs	350	5	0.4	[70]
Cr-doped CuO	450	3.2	0.4	[71]
SnO2/SiO2	270	300	0.5	[67]
ZnCo2O4	200	500	0.5	[72]
Ru/WO3	300	1.5	0.5	[73]
NiFe2O4	160	200	0.52	[74]
ZnO:Pt	400	1000	1	[75]
ZnO:Nb	400	1000	1	[76]
Pd/LaFeO3	200	1	1	[76]
WO3/Pt-GNs **	200	10	1	[77]
In/WO3-SnO2	200	50	1	[78]

* 3DIO: three-dimensional inverse opal: ** GNs: graphene nanosheets.