The large-scale synthesis of one-dimensional TiO₂nanostructures using palladium as catalyst at low temperature

Abstract

The synthesis of TiO(2) nanostructures including nanowires and nanobelts has been demonstrated experimentally by anodization of Ti foil in an electrolyte, and by treatment in a PdCl(2) ethanol solution together with UV light irradiation and annealing at a temperature below 800 degrees C. The TiO(2) nanotube arrays resulting from the anodization were used as source precursor and transformed into nanowires and nanobelts respectively with high efficiency during the subsequent processes. The resulting TiO(2) nanowires and nanobelts, characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman and surface photovoltage (SPV) spectroscopy, are single rutile crystals of high quality. In addition to the synthesis of the nanostructure at low temperature, this method also shows great advantages for the selectable morphology of the final TiO(2) nanostructures via adjustment of the UV light irradiation time and annealing temperature.

Anodic formation of highly ordered TiO2 nanotube arrays on conducting glass substrate: Effect of titanium film thickness

“…The inset of the figure shows the plot of (F*h) versus photon energy. 42 Furthermore, the higher band-gap energy was obtained with the highly ordered TiO 2 nanotube arrays that is attributed to the quantum size effect of the small grains composing the nanotubes, which is consistent with results of other workers. The corresponding absorption edge wavelengths are around 370, 383, and 360 nm in the ultraviolet region.…”

Two-dimensional amorphous NiO as a plasmonic photocatalyst for solar H2 evolution

“…Typically, to achieve an optimal performance in the methanol reforming reaction, a large methanol concentration, even larger than 95 vol%, is required since the main species adsorbed on the photocatalyst should be methanol 45 , 48 – 50 . Supplementary Fig.…”

Photoluminescence and surface photovoltage properties of ZnSe nanoribbons

“…The PL and excitation spectra were carried out on a fluorescence spectrophotometer (PTI, QM4) with 405-nm laser excitation for power-dependent PL measurements. The SPV was measured with home-made systems [22][23][24]. Briefly, a grating monochromator coupled with a 500-W xenon lamp was used to obtain the monochromatic light for SPV excitation.…”

“…However, little attention has focused on the trap effect of the DD states correlating with photoelectric response understood as separation of photogenerated carriers, which competes with the radiative pathway for PL emission [20]. Surface photovoltage (SPV), generated from the special separation of photogenerated electron-hole pairs, has been applied in nondestructive characterization of the optoelectronic properties for bulk and nanostructured semiconductor materials [21][22][23][24].…”