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- Title
Hard-template synthesis of titanium dioxide hollow spheres.
- Authors
Kusior, Anna; Warchal, Andrzej; Komornicki, Stanislaw; Radecka, Marta
- Abstract
An easy approach for the fabrication of titanium dioxide hollow spheres is proposed. Nanostructures were obtained by the conventional hard template method with silica-protected calcination. The samples were characterised by differential thermal analysis and thermogravimetry, Brunauer-Emmett-Teller nitrogen adsorption isotherms, X-ray diffraction, scanning and transmission electron microscopy (SEM and TEM). Raman spectroscopy and optical properties of the prepared materials were studied as well. X-ray analysis has shown that the silica protection layer allows direct phase transformation from amorphous titania to crystalline anatase regardless of the temperature. The crystallite size is more than 5 nm. The diameter of the obtained hollow nanostructures is within the range 115-420 nm. The thickness of the walls varies from 12 to 38 nm depending on annealing conditions. TEM and SEM images confirm their spherical shape.
- Subjects
CHEMICAL templates; CHEMICAL synthesis; TITANIUM dioxide; MICROFABRICATION; NANOSTRUCTURED materials; CALCINATION (Heat treatment)
- Publication
Micro & Nano Letters (Wiley-Blackwell), 2014, Vol 9, Issue 10, p721
- ISSN
1750-0443
- Publication type
Article
- DOI
10.1049/mnl.2014.0414