Photocatalytic oxidation of methyl ethyl ketones over sol–gel mesoporous and meso-structured TiO2 films obtained by EISA method

Enhanced photocatalytic activity of mesoporous SiO2/TiO2 sol–gel coatings doped with Ag nanoparticles

“…The increase in the photocatalytic activity can be explained considering several non-mutually exclusive mechanisms, by which metallic nanoparticles can enhance the rates of photocatalysis: (1) increase in the concentration of energetic reactive species by delaying the e-h recombination [62], (2) increase in the photon optical path length through TiO 2 by dispersion effects from NPs [63], (3) decrease in E g by Ag-doping of TiO 2 [30], (4) increase in light intensity by LSPR and reinforcement of the near electric field [53,64], and (5) increase in the contact surface between the catalytic material and the reaction medium [14,26].…”

“…Moreover, the design and development of mesostructured TiO 2 materials by combining the sol-gel method with the use of surfactants as structure-directing agents allow producing coatings with tailored pore sizes and high specific surface area. The contact surface between the catalyst and the species to be eliminated greatly increases in these films, improving their photocatalytic activity [14,26] compared to that of powder and bulk materials. These characteristics allow solving the limitations on the pore size of zeolites and provide new opportunities in catalytic applications.…”

Synthesis and photocatalytic characterisation of mesoporous TiO2 films doped with Ca, W and N

“…The textural and morphological properties greatly enhance the photocatalytic efficiency properties. 15,16 Different studies indicate that photocatalytic activity depends mainly on the total surface effectively irradiated with UV photons. 17 The aim of this work was to prepare mesoporous nanocrystalline TiO 2 -anatase films doped with Ca, W and N, using F127 and Brij58 as surfactants, to analyse the effect of dopants in the photocatalytic activity.…”

“…The specific surface area (S s ) together with the exposed area (S exp ) was calculated, 17,21,24 (Table 2). This last parameter represents the total area exposed to irradiation, thus being relevant for photocatalytic behaviour.…”

Sol–gel-hydrothermal synthesis of Er3+:Y3Al5O12/Pt–TiO2 membrane and visible-light driving photocatalytic hydrogen evolution from pollutants

“…However, it is still far from being a perfect and ideal photocatalyst. The main disadvantage of TiO 2 is that it is active only under ultravoilet-light due to its wide band gap (E bg = 3.2 eV) [27]. Nevertheless, the ultravoilet-light in solar spectrum is less than 5.0%.…”