Formation of inorganic nanocomposites by filling TiO2 nanopores with indium and antimony sulfide precursor aerosols

Abstract Nanocomposites of nanoporous-TiO 2 /In 2 S 3 and np-TiO 2 /Sb 2 S 3 were formed by deposition of In 2 S 3 or Sb 2 S 3 using spray ion layer gas reaction technique from their precursor solutions onto nanoporous TiO 2 substrates at temperatures of 150, 175 and 200 °C. The least penetration of the precursor into np-TiO 2 was achieved for np-TiO 2 /In 2 S 3 nanocomposites from indium acetylacetonate salt. The deepest penetration was obtained for both np-TiO 2 /In 2 S 3 (Cl) and np-TiO 2 /Sb 2 S 3 nanocomposites with effective diffusion coefficients of 3.3 × 10 − 3  cm 2 /s and 3.2 × 10 − 3  cm 2 /s, respectively. The transport of the precursors in np-TiO 2 and the formation of different nanocomposites were described the regime of the Knudsen diffusion model.