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Synthesis of Anatase TiO 2 Nanoparticles with β‐Cyclodextrin as a Supramolecular Shell
Author(s) -
Li Landong,
Sun Xiaohong,
Yang Yali,
Guan Naijia,
Zhang Fuxiang
Publication year - 2006
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.200600103
Subject(s) - anatase , nanoparticle , supramolecular chemistry , steric effects , hydrothermal synthesis , materials science , cyclodextrin , chemical engineering , nanotechnology , hydrothermal circulation , molecule , photocatalysis , chemistry , catalysis , organic chemistry , engineering
We report a novel, green hydrothermal‐synthesis route to well‐dispersed anatase TiO 2 nanoparticles with particle sizes of 9–16 nm in the presence of β‐CD (β‐cyclodextrin). During the synthesis process, the CD‐containing synthesis mixture assembled in both longitudinal and latitudinal directions. Driven by the interaction between molecules, the β‐CDs assembled in the longitudinal direction to form long‐chain compounds, whereas in the latitudinal direction, they tended to form regular aggregates through coordination with the Ti species from the hydrolysis of tetrabutyl titanate. In view of the effect of the coordination and the steric hindrance of β‐CDs as a supramolecular shell, homogeneous nuclei and slow growth of TiO 2 crystals during the synthesis process was observed, which was responsible for the formation of uniform TiO 2 nanoparticles. The low β‐CD dosage and the high product yield (>90 %) demonstrated well the potential of this synthesis route in the large‐scale industrial production of anatase nanoparticles.