Raman spectroscopy of TiO2 thin films formed by hybrid treatment for biomedical applications

Structural, Morphological, and Electrochemical Corrosion Properties of TiO2 Formed on Ti6Al4V Alloys by Anodization

“…The phase composition of the samples was confirmed by Raman spectroscopy. According to the literature, for TiO 2 , there exists three crystal forms; the rutile structure has four Raman active modes: A 1g + B 1g + B 2g + E g , which were identified at 143 cm −1 (B 1g ), 447 cm −1 (E g ), 612 cm −1 (A 1g ), and 826 cm −1 (B 2g ); the anatase structure or octahedrite has six Raman active modes: A 1g + 2B 1g + 3E g , identified, respectively, at 144 cm −1 (E g ), 197 cm −1 (E g ), 399 cm −1 (B 1g ), 513 cm −1 (A 1g ), 519 cm −1 (B 1g ), and 639 cm −1 (E g ); and the brookite form which has the larger number of Raman actives modes (9A1g + 9B1g + 9B2g + 9B3g) owing of its lower symmetry and larger unit cell …”

Promotion effect of ultraviolet light on NO + CO reaction over Pt/TiO2 and Pt/CeO2–TiO2 catalysts

“…All samples present the peaks at 146, 195, 397, 515, 640 cm −1 , corresponding to the six Raman vibration mode of 3Eg, 2B1g and A1g. Here, the bands at 143, 195 and 393 cm −1 can be predominantly attributed to the O-Ti-O bending vibration and the bands 515 and 640 cm −1 to Ti-O stretching vibration of TiO 2 anatase[25]. As compared to that of Pt/TiO 2 , the O-Ti-O bending vibration peak of Pt/CeO 2 -TiO 2 make a shift to a lower wavenumber and become narrower (seen the amplified part inFig.…”

Catalytic and photocatalytic oxidation of diphenyl sulphide to diphenyl sulfoxide over titanium dioxide doped with vanadium, zinc, and tin

“…Calcination of the V-TiO 2 samples resulted in the appearance of the bands characteristic for the rutile phase at 234, 449, and 612 cm À1 . 24 For the calcined TiO 2 sample, these bands are signicantly less intense or even invisible. A similar effect of the anatase to rutile transformation in the presence of small amounts of vanadium was recently reported by Shao et al, 25 as well as in our previous paper.…”