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

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      https://www.ias.ac.in/article/fulltext/boms/034/02/0239-0244

    • Keywords

       

      𝛾-Al2O3; 𝛾-AlOOH; nanowires; hydrothermal route; pH value.

    • Abstract

       

      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.

    • Author Affiliations

       

      Qi Yang1

      1. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
    • Dates

       
  • Bulletin of Materials Science | News

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