Fig. 3From: Highly Sensitive Ethanol Chemical Sensor Based on Novel Ag-Doped Mesoporous α–Fe2O3 Prepared by Modified Sol-Gel Processa UV-vis optical absorption spectra measured in DI water and b PL spectra measured at an excitation wavelength 315 nm for α−Fe2O3 and 1%Ag/α−Fe2O3Back to article page