Highly Sensitive Ethanol Chemical Sensor Based on Novel Ag-Doped Mesoporous α–Fe2O3 Prepared by Modified Sol-Gel Process

Table 2 Comparison of sensing performance of ethanol with previously reported modified electrodes

Modified electrode	Linear range (mM)	LOD (mM)	Sensitivity (μAmM⁻¹ cm⁻²)	Ref.
SnO₂–ZnO	0.195–25	0.137	62.56	[62]
Polypropylene carbonate/silica	0.17–850	0.021	0.5698	[65]
Mesoporous Pd–ZnO	0.05–0.8	0.0192	33.08	[66]
Gd₂O₃ nanostructures	0.17–850	0.052	0.266	[69]
ZnO–CeO₂	0.17–1700	0.16	0.8331	[70]
CuO nanosheets	0.17–1700	0.143	0.9722	[71]
Ni-doped SnO₂	10⁻⁶–1	0.6 × 10^− 6	2.3148	[72]
Mg(OH)₂ nanodisks	10⁻⁴–10	73 × 10^− 6	6.89	[73]
poly(1–naphthylamine)	0.78–50	–	1.66	[74]
Mg(OH)₂ nanosheets	0.01–1000	0.005	3.991	[75]
Mesoporous Ag/α–Fe₂O₃	0.05–0.8	0.0154	41.27	This work
Mesoporous Ag/α–Fe₂O₃	0.8–15	0.0154	2.93	This work