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Lu, Yan ; Hoffmann, Martin ; Yelamanchili, Ram Sai ; Terrenoire, Alexandre ; Schrinner, Marc C. ; Drechsler, Markus ; Möller, Michael W. ; Breu, Josef ; Ballauff, Matthias:
Well-Defined Crystalline TiO₂ Nanoparticles Generated and Immobilized on a Colloidal Nanoreactor.
In: Macromolecular Chemistry and Physics.
Bd. 210
(2009)
Heft 5
.
- S. 377-386.
ISSN 1521-3935
DOI: https://doi.org/10.1002/macp.200800608
Abstract
We synthesized well-defined, crystalline TiO2 nanoparticles at room temperature by using spherical polyelectrolyte brush particles as a template. The template particles consist of a polystyrene core from which long chains of poly(styrene sodium sulfonate) are grafted. Tetraethylorthotitanate is hydrolyzed in the presence of brush particles leading to the formation of well-dispersed TiO2 nanoparticles (d = 4∼12 nm). Wide-angle X-ray scattering demonstrates that anatase nanoparticles with high crystallinity have been generated at room temperature. The as-prepared TiO2 nanocomposites present high photocatalytic activity for the degradation of Rhodamine B under UV irradiation. Finally, mesoporous TiO2 structures with defined pore size are formed after calcination.