A practical and feasible way to synthesize Magnéli phase conductive nanowires
This paper employs an original method to synthesize nanostructured Magnéli phases TinO2n−1 via a both practical and feasible way. The whole preparation process entails two steps including acquiring ceramic TiO2 nanowires under hydrothermal treatment followed by subsequent heat treatment at 600 °C and reducing the nanowires through carbothermal reduction by using PEG-600 as organic carbon resource. Ti6O11 nanorods and Ti9O17 nanowires with slight carbon coating were successfully fabricated respectively at 1000 and 850 °C, which exhibit high electrical conductivity behavior at room temperature. The SEM and TEM images confirm that the nanowires transformed to nanorods at increased temperature while still remain as 1D nanostructures. Compared to that of the non-conductive TiO2 precursor, the powder resistivity of TinO2n−1 nanowires dramatically decrease down to 1.74 × 10−2 Ω m.
KeywordsTiO2 Oxygen Reduction Reaction Hydrothermal Reaction Carbothermal Reduction Transmission Electron Diffraction
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