• Qi Yang

      Articles written in Bulletin of Materials Science

    • Synthesis of 𝛾-Al2O3 nanowires through a boehmite precursor route

      Qi Yang

      More Details Abstract Fulltext PDF

      Crystalline 𝛾-Al2O3 nanowires with diameter, 20–40 nm, length above 600 nm and aspect ratio above 30 have been successfully synthesized by thermal decomposition of boehmite (𝛾-AlOOH) precursors obtained via hydrothermal route by using AlCl3, NaOH and NH3 as starting materials. Thermogravimetric analysis (TG), differential thermal analysis (DTA), X-ray diffraction (XRD), transmission electron microscope (TEM), selected area electron diffraction (SAED) and high resolution transmission electron microscope (HRTEM) were used to characterize the features of the as-made 𝛾-Al2O3 nanowires and their 𝛾-AlOOH precursors. The pH value of the solution and the mixed precipitant play important roles in the formation of 𝛾-AlOOH nanowires. After calcination at 500°C for 2 h, the orthorhombic 𝛾-AlOOH transforms to cubic 𝛾-Al2O3 and retains nanowire morphology.

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