Titania films, photocatalytic preparation

In our work [134] we addressed the sol-gel preparation of mesoporous Ag-doped titania films by using eommereially available AgNOs and a non-ionic surfactant (Pluronic F-127) to increase its photocatalytic activity for degradation of organic pollutant. 

In situ degradation of the azo dye methyl orange in aqueous solution was performed in the presence of various pure and Ag metal ion-doped titania thin films, prepared with and without surfactants. The main aim of the study was to analyze the effect of non ionic surfactant (Pluronic F-127), Ag metal ion doping and their combined effect on the photo-induced hydrophilicity and photocatalytic degradation of ambient air contaminants (gas-solid interface), methyl stearate (solid-solid interface) and azo dye methyl orange (liquid-solid interface). 

Langlet M., Kim A., Audier M., Herrmann J.M. Sol-gel preparation of photocatalytic Ti02 films on polymer substrates. J. Sol-Gel Sci. Technol. 2002 25 223-234 Langlet M., Kim A., Audier M., GuUlard C., Herrmann J.M. Transparent photocatalytic films deposited on polymer substrates from sol-gel processed titania sols. Thin Sohd Pilms 2003 429 13-21... 

The principle and the research progress in the electrophoretic sol-gel deposition technique, which is combined sol-gel method for particle preparation and electrophoretic deposition of the sol-gel derived particles, have been described. In the principal, (1) preparation of particles by the sol-gel method, (2) deposition of particles by electrophoresis, (3) constant-voltage and constant-current deposition, and (4) solvent and electrification are introduced, hi the practical application, (1) silica thickfihns, (2) titania thick films, (3) polysilsesquioxane thick films, and (4) template-based oxide nanorods are illustrated. The electrophoretic sol-gel deposition technique offers the advantages of functional coatings in various research fields such as chemically and mechanically protective, electrically conductive, photocatalytic and bioactive materials, and it expands the possibility of fabricating optical components and ahgned micro- and nanostructures. 

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