Аннотация:The electrochemical methods are successfully used to produce all types of nanostructures and nanomaterials. The high surface area of nanoparticle (NP) modified electrodes is also attractive in catalysis and electrochemical sensor applications. Ionic liquids (IL) exhibit very suitable electrochemical properties such as wide window of electrochemical stability. Combination of both electrostatic and steric properties of ions of IL led to stabilization of metal and oxide NPs. Nanoparticles of titanium oxide (TiO2) were electrochemically anodic deposited onto a titanium substrate by a anodizing at room temperature without any template or catalyst in IL 1-butyl-3-methyl imidazolium cation [BMIM+] and anion bis(trifluoromethanesulfonyl)imide [NTf2-]. Water content in ionic liquid was 320 ppm. The potential transients during nanoparticle growth at different applied anodic current and SEM images of the TiO2 nanoparticles prepared by anodizing of Ti-foil are presented in Figure. The behavior of potential tending to increase with the anodization time and current. The nanorods of TiO2 may be succeeded when formation and dissolution reaction rate tends toward be equal. The potential transients were criterion for anodizing. By controlling the H2O concentration, the oxide morphology of anodic TiO2 could be completely switched from nanoporous to nanotubular. The nanorod array films were used as photoanodes in dye sensitized solar cells (DSSCs).
