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Titania Nanotubes Prepared by Chemical Processing
Author(s) -
Kasuga T.,
Hiramatsu M.,
Hoson A.,
Sekino T.,
Niihara K.
Publication year - 1999
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199910)11:15<1307::aid-adma1307>3.0.co;2-h
Subject(s) - materials science , distilled water , aqueous solution , anatase , rutile , amorphous solid , transmission electron microscopy , titanium oxide , chemical engineering , nanotube , phase (matter) , titanium , nanotechnology , alkali metal , carbon nanotube , photocatalysis , organic chemistry , chromatography , metallurgy , chemistry , catalysis , engineering
We report a new method for the synthesis of titanium oxide (TiO 2 ) nanotubes. When anatase‐phase‐ or rutile‐phase‐containing TiO 2 was treated with an aqueous solution of 5–10 M NaOH for 20 h at 110 °C and then with HCl aqueous solution and distilled water, needle‐shaped TiO 2 products were obtained (diameter ≈ 8 nm, length ≈ 100 nm). The needle‐shaped products are nanotubes with inner diameters of approximately 5 nm and outer diameters of approximately 8 nm. The formation mechanism of titania nanotubes is discussed in terms of the detailed observation of the products by transmission electron microscopy: the crystalline raw material is first converted to an amorphous product through alkali treatment, and subsequently, titania nanotubes are formed after treatment with distilled water and HCl aqueous solution.