Synthesis and Characterization of Titanate Nanotubes and Nanowires in a Revolving Autoclave

Abstract:

One-dimensional titanate nanotubes and nanowires were synthesized by hydrothermally treating TiO₂ nanoparticles (P25) with an aqueous NaOH solution in a revolving autoclave. The effect of the reaction temperature and time on the morphology and crystal structure of titanate nanomaterials was systematically studied. When the hydrothermal treatment was carried out in a revolving autoclave, nanotubes with Na_xH_1-xTi_2-x/4Υ_x/4O₄•H₂O crystal structure were obtained and favor to self-assemble in shape of clusters and bundles, and nanotube bundles tended to transform into nanowires with the crystal structure transforming into Na_xH_2-xTi₃O₇ within 48 h at a hydrothermal temperature higher than 130 °C. Based on the experimental results, a possible mechanism for the formation of titanate nanotube by wrapping of nanosheets and nanowires formed via the cooperation of oriented attachment and Ostwald ripening was proposed.

• Periodical: Advanced Materials Research (Volumes 194-196)
• Pages: 497-502
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.194-196.497
• Online since: February 2011
• Authors: Xue Fei Li, Qing Ze Jiao, Yun Zhao, Han Sheng Li
• Keywords: Hydrothermal Treatment, Nanotube, Nanowire, Titanate

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