Mid-infrared absorption of trapped electrons in titanium(iv) oxide particles using a photoacoustic FTIR techniqueElectronic supplementary information (ESI) available: Additional information. See DOI: 10.1039/c8cp04885a

Mid-infrared absorption of titanium( iv ) oxide (TiO 2 ) under ultraviolet (UV) irradiation was studied by Fourier transform infrared spectroscopy using a photoacoustic (PA) technique. UV irradiation induced an upward shift of the PA spectra, which is due to the trivalent titanium (Ti 3+ ) species p...

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Main Authors: Murakami, Naoya, Shinoda, Tatsuki
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Summary:Mid-infrared absorption of titanium( iv ) oxide (TiO 2 ) under ultraviolet (UV) irradiation was studied by Fourier transform infrared spectroscopy using a photoacoustic (PA) technique. UV irradiation induced an upward shift of the PA spectra, which is due to the trivalent titanium (Ti 3+ ) species produced by electron accumulation. The PA spectra under UV irradiation mainly depend on the crystal structure, indicating that the energy levels of Ti 3+ are largely determined by crystal structures. The energy level of trapped electrons in titanium( iv ) oxide particles was analysed via mid-infrared absorption using photoacoustic Fourier transform infrared spectroscopy.
ISSN:1463-9076
1463-9084
DOI:10.1039/c8cp04885a