TiO2 doped with Sm3+ by sol–gel: Synthesis, characterization and photocatalytic activity of diuron under solar light

Effects of surface hydroxyl group density on the photocatalytic activity of Fe3+-doped TiO2

“…For the purpose of improving optical absorption and photocatalytic activity, all kinds of attempts have been made to extend the light absorption toward the visible light range and to prohibit the recombination of electron-hole pairs. Many techniques have been reported to shift the absorption wavelength toward the visible region such as doping the transition metals [10][11][12][13][14][15][16][17], noble metals [18,19], non-metal materials [20][21][22], rare earth metals [23][24][25] and other materials [26,27] into titanium dioxide, in which Fe 3+ -doped TiO 2 photocatalysts show a relatively high level of photocatalytic activity under visible-light irradiation.…”

Lanthanides Effects on TiO2 Photocatalysts

“…Cruz et al [88] published a research about titanium dioxide doped with samarium via sol-gel method, in which the photocatalytic degradation of a herbicide under UV light was investigated. The parameters evaluated were the calcination temperature and the samarium concentration, with the best efficiency in herbicide degradation when the samples were calcined at 773 K for 4 h. Similar results were obtained by Yang et al [76], which showed that the degradation of the methylene blue by TiO 2 doped with neodymium and fluorine via sol-gel method was optimized when the temperature and time of calcination were equal to 773 K and 3 h, respectively.…”

Photocatalytic Treatment of Pesticides Using TiO2 Doped with Rare Earth

“…Spectra were obtained by a PerkinElmer Spectrum GX NIR-FT Raman spectrometer equipped with a microscope and CCD detector. Spectra were taken at room temperature and using a 5145°A line and argon ion laser (model spectra physics 2020) excited with of 50 mV of energy [50].…”