Abstract
Ti4O7 submicron rods were successfully fabricated by heat-treating H2Ti3O7 nanowires doped with nano-sized carbon black. This novel method combines the technical superiority of hydrothermal method and carbothermal reduction. In order to investigate reaction process and the influence of the addition of carbon black and reaction temperature on the reduction process, we synthesized substoichiometric titanium oxides in different conditions. The results showed that Ti4O7 submicron rods could be prepared with carbon black content of 3.7 % wt% by heating at 1075 °C for 3 h. The Ti4O7 samples with higher specific surface area showed outstanding conductivity and optical properties. The UV–Vis spectra of Ti4O7 submicron rods showed that the absorption band covered the visible region and part of the near-infrared region. The light absorption property of Ti4O7 submicron rods is quite different with that of TiO2.
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