Ag deposited mixed phase titania visible light photocatalyst – Superiority of Ag-titania and mixed phase titania co-junction

The study of microstructure, optical and photocatalytic properties of nanoparticles(NPs)-Cu/TiO2 films deposited by magnetron sputtering

“…The transmittance was calculated from the measured absorbance (A l ) at a certain wavelength of light (l) using A l ¼ Àlog 10 (T). The band gap of TiO 2 is commonly believed to be indirect [16], thus on extrapolating the linear portion of the (ahn) 0.5 À hn plot to the energy axis, the indirect band gaps of the samples are obtained, namely the intersection value on the energy axis.…”

“…Due to the promising optical property of metal nanoparticle and photocatalytic activity of TiO 2 , remarkable efforts have been devoted to the investigation of TiO 2 doped with noble metal including Au [10], Ag [16,17] and Pt [18], through lots of physical and chemical preparation techniques such as solegel [16], magnetron sputtering [17] and photochemical reduction deposition [18]. By comparison, the microstructural, optical absorption properties and photocatalytic activity of Cu nanoparticle embedded TiO 2 films is studied insufficiently due to the oxidative nature and diffusion to TiO 2 of Cu [19].…”

Enhanced hydrogen evolution from water splitting using Fe-Ni codoped and Ag deposited anatase TiO2 synthesized by solvothermal method

“…O vacancies, a kind of defects, are very close with the charge transfer channel in TiO 2 . Because the metal work function of Ag (4.6 eV) is higher than that of TiO 2 (4.2 eV) [62], the photoexcited electrons can transfer from TiO 2 to Ag NPs until the Fermi level equilibrium is achieved by forming a Schottky barrier on their contact surface, which can create a transport channel for high conductivity, this improved electron transfer will reduce the recombination chance of the charge carriers [63,64]. The Fe/Ag/TiO 2 and Ni/Ag/TiO 2 display the better optical properties than that of single metal modified catalysts according to the UV-vis absorption and photoluminescence spectra.…”

Ag@Ag2SO4 nanoparticles: simple microwave-assistance synthesis, characterization and its co-photocatalytic degradation of methylene blue

“…Till now, various materials have been used as semiconductor photocatalysts and among of them, TiO 2 is an appropriate and efficient choice to use owing to its wellknown incomparable qualities [7][8][9][10][11]. Nevertheless, this semiconductor has a few major drawbacks on its photoexcitation domain includes: (1) wide band gap energy 3.2 eV, (2) possess low absorption capability especially in the visible light region and (3) exhibit high recombination of photogenerated electron-hole thus hindering its visible light-driven photocatalytic performance [1,[12][13][14][15][16][17][18][19]. Thus, remarkable efforts have been devoted to overcome all these limitations by doping/composite with metal, non-metal (NPs), noble metal inclusion or deposition to gain plasmonic property [20][21][22][23][24][25][26][27][28] and etc.…”