Cu–Co-codoped titanate/TiO2 nanocomposite thin films for enhanced visible light absorption
MICRO & NANO LETTERS（2019）
Abstract
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 degrees 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.
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Key words
energy gap,nanocomposites,semiconductor growth,copper,infrared spectra,scanning electron microscopy,nanofabrication,cobalt,nanotubes,annealing,titanium compounds,ultraviolet spectra,visible spectra,transmission electron microscopy,X-ray diffraction,semiconductor doping,transmission electron microscopy,ultraviolet-visible absorption spectra,alkaline hydrothermal method,TNT films,ion exchange method,as-prepared nanocomposite films,titanate nanosheets,nanocomposite thin films,titanate nanotube thin films,XRD,anatase particles,energy band gap,time 3,0 d,temperature 500,0 degC,time 120,0 min
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