Au-TiO2 nanofilms for enhanced photocatalytic activity

Laser Direct Writing of Crystallized TiO2 by Photothermal Effect Induced by Gold Nanoparticles

“…A nanoporous structure of the TiO 2 layer is observed, which could be interesting for photocatalytic applications. [45,46] XPS measurements were also performed on a spin-coated xerogel thin film (Figure S2a-c, Supporting Information) and on a TiO 2 thin film after fast thermal annealing at 500 °C (Figure S2d, Supporting Information). By comparing the O1s component of the spin-coated xerogel (Figure S2c, Supporting Information) and TiO 2 (Figure S2d, Supporting Information) thin films, we observe the removal of organic ligands which proves the mineralization (only residual organics are found due to surface contamination).…”

Effects of Ag0-modification and Fe3+-doping on the structural, optical and photocatalytic properties of TiO2

“…The decolorization rate of 1% Ag/1% Fe–TiO 2 is 64.3%, suggesting that its photocatalytic activity is higher than Fe–TiO 2 but lower than pure TiO 2 . The decolorization of RhB by TiO 2 can be considered as a first-order reaction, 17,19,46 and the calculation formula of the reaction rate constant k is as follows: ln( C t / C 0 ) = − kt where t is the reaction time, C 0 and C t are the initial concentration and the concentration at time t . The first-order reaction kinetics fit curves are shown in Fig.…”

“…The decolorization rate of 1% Ag/1% Fe-TiO 2 is 64.3%, suggesting that its photocatalytic activity is higher than Fe-TiO 2 but lower than pure TiO 2 . The decolorization of RhB by TiO 2 can be considered as a rst-order reaction, 17,19,46 and the calculation formula of the reaction rate constant k is as follows:…”

“…[10][11][12] Precious metal deposition is able to improve the utilization of sunlight and promote the separation of photogenerated pairs, which are in favor of photocatalytic activity. [13][14][15][16] Zhou et al 17 prepared Au-deposited TiO 2 lms on indium-tin oxide glass by magnetron sputtering. Compared with pure TiO 2 lm, Au/TiO 2 lms show better photocatalytic activity because of their higher separation rate of photogenerated pairs and narrower band gaps.…”

Preparation of Ag-Coated SiO2@TiO2 Core-Shell Nanocomposites and Their Photocatalytic Applications towards Phenol and Methylene Blue Degradation

“…Noble metals such as Ag, Au, and Pt were deposited on the surface of TiO 2 nanoparticles, thereby suppressing the recombination of electron-hole pairs, prolonging the lifetime of the electron-hole pairs and improving its degradation efficiency [15][16][17][18][19]. Among noble metals, Ag has been proved as an effective doping metal on the surface of TiO 2 nanoparticles to improve photocatalytic efficiency due to its high work function and its ability to generated surface plasmons at desired wavelengths [20].…”