access icon free Cu–Co-codoped titanate/TiO2 nanocomposite thin films for enhanced visible light absorption

Titanate nanotube thin (TNT) films were synthesised by alkaline hydrothermal method using titanium (Ti) plates as precursors. Copper–cobalt (Cu–Co)-codoped titanate/Ti dioxide (TiO2) nanocomposite thin films were prepared by doping Cu and Co to TNT films through ion exchange method and annealed at 500°C for 120 min. The as-prepared nanocomposite films were characterised by scanning electron microscopy, transmission electron microscopy, X-ray diffractometer, and ultraviolet–visible absorption spectra. The results show that anatase TiO2 particles were grown on the surface of titanate nanomaterial films. The composite materials mainly consisted of anatase TiO2 particles and titanate nanotubes/nanosheets. Cu–Co-codoped titanate/TiO2 nanocomposite thin films exhibited superior visible height adsorption property due to the reduced energy bandgap of composites introduced by additional Cu and Co 3d orbitals.

Inspec keywords: infrared spectra; semiconductor doping; copper; transmission electron microscopy; energy gap; nanofabrication; annealing; titanium compounds; cobalt; X-ray diffraction; ultraviolet spectra; nanotubes; scanning electron microscopy; semiconductor growth; visible spectra; nanocomposites

Other keywords: nanocomposite thin films; anatase particles; time 120.0 min; TNT films; time 3.0 d; XRD; temperature 500.0 degC; energy band gap; ultraviolet–visible absorption spectra; alkaline hydrothermal method; transmission electron microscopy; titanate nanosheets; titanate nanotube thin films; ion exchange method; as-prepared nanocomposite films

Subjects: Annealing processes; Semiconductor doping; Visible and ultraviolet spectra of other nonmetals; Other heat and thermomechanical treatments; Oxide and ferrite semiconductors; Thin film growth, structure, and epitaxy; Other methods of nanofabrication; Doping and implantation of impurities; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Optical properties of other inorganic semiconductors and insulators (thin films, low-dimensional and nanoscale structures)

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