Electrochemical properties of nanoporous TiO_2 films

摘要

The precursor solutions containing TiO_2 sol for nanoporous films were prepared by hydrolyzing titanium(IV) isopropoxide and adding trehalose dihydrate. The porous and thick TiO_2 film was prepared by dip-coating technique on glass substrate and heating at 500 deg C. The film was composed of nano sized particles (10-20 nm) and pores (7 nm). The specific surface area of the film was 163 m~2/g. The film had humidity-sensitive electrical resistance at room temperature.