Two-stage, non-hydrolytic synthesis for improved control of TiO sub(2) nanorod formation

TiO sub(2) anatase nanorods were grown via the non-hydrolytic elimination reaction between TiCl sub(4) and Ti(O super(i)Pr) sub(4) in the presence of oleic acid. The reaction was carried out in two stages in order to separate TiO sub(x) seed nucleation at lower temperatures from nanorod growth at hi...

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Bibliographic Details
Published in:Journal of materials chemistry 2012-05, Vol.22 (24), p.12172-12178
Main Authors: Menzel, Robert, Cottam, Ben F, Ziemian, Sabina, Shaffer, Milo SP
Format: Article
Language:English
Subjects:
Anatase
Crystal growth
Crystallinity
Nanocomposites
Nanomaterials
Nanostructure
Seeds
Titanium dioxide
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Summary:TiO sub(2) anatase nanorods were grown via the non-hydrolytic elimination reaction between TiCl sub(4) and Ti(O super(i)Pr) sub(4) in the presence of oleic acid. The reaction was carried out in two stages in order to separate TiO sub(x) seed nucleation at lower temperatures from nanorod growth at higher temperatures. This separation made it possible to study the crystal growth mechanism in more detail, indicating that nanorod formation occurred through a combination of atom-by-atom addition and oriented attachment of the initial seeds. The two-stage reaction approach also enabled considerably improved control of titania nanorod formation in terms of product morphology, crystallinity and uniformity. The effects of a range of reaction parameters, including reaction duration, temperature, dilution and stoichiometry, were investigated.
ISSN:0959-9428
1364-5501
DOI:10.1039/c2jm30922j