期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 210, 期 5, 页码 377-386出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.200800608
关键词
crystalline; nanocomposite; photocatalyst; polyelectrolyte brushes; titania
资金
- Deutsche Forschungsgemeinschaft
- SFB 481
- Bayreuth
- Schwerpunktprogramm Hydrogele [SPP1259/1]
- BASFAG
- Fonds der Chemischen Industrie
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 similar to 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.
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