Preparation of TiO₂ Nanoparticles by Hydrothermal Method and its Application for Photoelectrochemical Cell

By varying the hydrolysis and hydrothermal processing parameters in preparing TiO₂ nanoparticles different sizes of TiO₂ nanoparticles are obtained. (1) At higher autoclaving temperature, lower pH and longer autoclaving period, larger sizes of TiO₂ nanoparticles are prepared. (2) The nanoporous electrodes made from sintering smaller TiO₂ nanoparticles show relatively poor IPCE and low absorption in UV-Vis spectrum, (3) Higher IPCE can be achieved with TiO₂ nanoporous electrodes made from sintering larger TiO₂ nanoparticles. These electrodes are suitable for studying behavior of the photoelectrochemistry of dye sensitized nanoporous electrodes.