Effect of hydrostatic pressure on the Raman spectrum of anatase (TiO2)

Effects of surface-modification with Bi2O3 on the thermal stability and photoinduced charge property of nanocrystalline anatase TiO2 and its enhanced photocatalytic activity

“…In the Raman spectrum of TiO 2 , the peaks, located at 143, 194, 396, 514 and 636 cm À1 , are attributed to the anatase phase, while other peaks, positioned at 235, 443 and 608 cm À1 , are characteristic of the rutile phase [33][34][35]. Fig.…”

Exploring the effect of boron and tantalum codoping on the enhanced photocatalytic activity of TiO2

“…For all the samples, four Raman bands centered at ∼144, ∼396, ∼518, ∼639 cm −1 , and a weak shoulder at ∼197 cm −1 were observed. It has been reported previously that anatase TiO 2 has six active Raman modes including 3E g modes at ∼145, ∼197, and 638 cm −1 , 2B 1g mode at ∼399 and ∼519 cm −1 , as well as a A 1g at ∼513 cm −1 [8,[40][41][42][43]. On the other hand, rutile phase has 4 Raman active modes at 143, 447, 612, and 826 cm −1 [44] while brookite phase has 3 Raman active modes at 247, 326, and 366 cm −1 [45,46].…”

Mechanochemical preparation of nanocrystalline TiO2 powders and their behavior at high temperatures

“…[18,19]) and can be easily notable. The high-pressure phase, TiO 2 II, was irreversibly formed from anatase or rutile at pressures higher than 2.56 [20] and 6 GPa [21,22], respectively. In the Raman spectrum this phase was evident, since from 18 Raman-active modes at least 10 could be resolved at RT [20,22].…”