Synthesis of nanotube from a layered H2Ti4O9 · H2O in a hydrothermal treatment using various titania sources
2004
Nakahira, A. | Kato, W. | Tamai, M. | Isshiki, T. | Nishio, K. | Aritani, H.
In this paper, the synthesis of tubular titania was carried out through a soft chemical hydrothermal reaction of TiO₂ powders in NaOH or KOH aqueous solution systems. It was found that nanotubular products prepared in our studies were identified as H₂Ti₄O₉·H₂O by X-ray diffraction analysis with their morphology and crystallinity being dependent on synthetic conditions, i.e. reaction time and temperature of the hydrothermal process. The photocatalytic activity of nanotubular H₂Ti₄O₉·H₂O was evaluated in a decomposition test of HCHO at 298 K in an aqueous system using radiation with a mercury lamp. The morphology and yield of these nanotubular products were found to be dependent on the hydrothermal synthetic conditions.
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