Surface reconstruction, oxygen vacancy distribution and photocatalytic activity of hydrogenated titanium oxide thin film

Study of Oxygen Vacancies on Different Facets of Anatase TiO2

“…When treated in air, Raman spectra of all three air treated samples remain unchanged. In comparison, samples calcined in H 2 all have an evident blue‐shift of E g mode around 142 cm –1 [8a,21]. Since Raman spectra of rutile TiO 2 have no characteristic Raman‐active mode around 142 cm –1 , we ascribe this blue shift to intrinsic changes of anatase TiO 2 .…”

Hydrogenation of biomass-derived compounds containing a carbonyl group over a copper-based nanocatalyst: Insight into the origin and influence of surface oxygen vacancies

“…As shown in Fig. 5, an emission peak at approximately 368 nm appears because of the recombination of excitons on the surface defects, such as oxygen vacancies [70]. It is interesting to note that CuMn-1 displays a stronger emission than the other three reduced samples, demonstrating a higher concentration of surface oxygen vacancies.…”

Highly Efficient Photocatalytic Z-Scheme Hydrogen Production over Oxygen-Deficient WO3–x Nanorods supported Zn0.3Cd0.7S Heterostructure

“…In a recent study, it is discovered that the oxygen vacancies improves the overall conductivity and enhances the adsorption of reactants on its surface for organic conversions 21 . Additionally, oxygen deficient metal oxide greatly enhances the visible-light driven hydrogen production by trapping the photo-induced charges and preventing the electron-hole recombination 22 . Mao and co-workers also created surface disorder in TiO 2 by hydrogenation and increased solar absorption while promoting photocatalytic activity 23 .…”