This research work aims to reduce the band gap of thin layers of titanium oxide by the incorporation of graphene oxide sheets. Thin layers of the TiO2-GO composites were prepared on a glass substrate by the spin-coating technique from GO and an aqueous solution of TiO2. A significant ...
Nanocrystalline TiO2 powders with different optical band gap have been successfully prepared using solution combustion method starting directly from titanium metal. The emphasis is placed on the role of fuel urea on the variations of optical band gap which is obtained from DRS data in the range of...
TiO2, with band gap energy of 3.2 eV, has been widely studied as a photocatalyst for the degradation of organic contaminants under UV light irradiation [9], [12]. Compared to other photocatalysts, TiO2 not only possesses high photo-oxidation and photo-stability, but is also nontoxic and ...
Notice that Ti2O3 presents the full ionized charge state (+4) as the most stable (lowest formation energy) spanning the entire rutile TiO2 band gap, while both Ti4O7 and Ti5O9 present the same trend from the VBM up to ε(+4/0) = ECBM − 0.36 eV and 0.48 eV ...
Figure4d shows the UV absorbance of nanometer TiO2with different crystalline types. As can be seen, the wavelength of light absorption is mainly in the ultraviolet region, and a small amount extends to the visible range. The photocatalytic properties of TiO2allow a small amount of band-gap light...
摘要: The VB energy level of TiO2-xNx can be fine tuned in a wide range by controlling the N content, which realized a high selectivity for the photocatalytic oxidation of alcohols into aldehydes in aqueous solution under visible light irradiation.关键词:...
Band gap engineering of TiO2 through hydrogenation Ibrahim, et al., Band gap engineering of TiO2 through hydrogenation, Appl. Phys. Lett. 105 (2014) 202114e202117.Mo LB, Bai Y, Xiang QY, Li Q, ... Li-Bin,Yang,Xiang,... 被引量: 0发表: 0年...
(-1)Ω/cm,and the band gap from 3.2 eV to 1.9 eV.After annealing,the Ge and Nb co-doped TiO_2 film shows not only a lower resistivity but also a stronger absorption for visible and infrared light.As a result,Ge and Nb co-doped TiO_2 film with adjustable band gap and resistivity ...
The most widespread method is the Tauc model which allows us to derive the band gap energy Eg from E(ε)n as a function of the incident energy E. The Tauc optical band gap associated with the thin films is determined through an extrapolation of the linear trend observed in the spectral ...
To further explore the photocatalytic mechanism, the band structures of TiO2and CsPbBr3QDs were investigated. The valence band (VB) potential was obtained by analyzing the VB XPS spectra. As shown in Supplementary Fig.17a, b, the energy level of valence band maximum (VBM) of TiO2and CsPbBr3...