The performance of fluorescence gas sensor using TiO2 coated dye-porphyrin nanocomposite thin films

This paper reports the performance of fluorescence gas sensor to detect the presence of volatile organic compounds. Two thin films were prepared; TiO₂ coated with iron (III) meso-tetraphenylporphine chloride (TiO₂ coated IMTPPCl) and TiO₂ coated with manganase (III) 5,10,15,20 tetra (4-pyridyl)-21 H, 23 H porphine chloride tetrakis (TiO₂ coated MnTPCl). All the thin films were deposited on quartz substrate using self-assembly through dip coating technique. The sensing properties of the thin films toward volatile organic compounds; ethanol, acetone and 2-propanol were studied using luminescence spectrometer. In presence of air and volatile organic compounds, thin films produced different emission spectra and ease for chemical identification process. The thin film of nanocomposite TiO₂ coated IMTPPCl produced more intensive interaction and exhibit good sensitivity than TiO₂ coated MnTPCl nanocomposite thin film. Hence, it is potentially be used as fluorescence gas sensor.