Influence of the sacrificial polystyrene removal pathway on the TiO₂ nanocapsule structure
- Hérault, Nelly Department of Chemistry, University of Fribourg, Switzerland
- Fromm, Katharina M. Department of Chemistry, University of Fribourg, Switzerland
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01.06.2017
Published in:
- Helvetica Chimica Acta. - 2017, vol. 100, no. 6, p. e1700014
English
This study demonstrates the significant influence of the polystyrene removal pathway on the TiO₂ nanocapsules obtained from PS@TiO₂ core-shell particles. In a first step, the polystyrene spheres were coated with titanium oxide via hydrolysis and condensation of the titanium precursor to form PS@TiO₂ core-shell particles. Then, the creation of the empty cavity to form TiO₂ nanocapsules was achieved by removing the polystyrene template by i) thermal decomposition of the polystyrene or ii) dissolution of the polystyrene using Soxhlet extractor followed by a thermal procedure. These pathways to remove the polystyrene were investigated by thermogravimetric studies, IR spectroscopy, transmission and scanning electron microscopy and powder X-ray diffraction. The final TiO₂ nanocapsule structure strongly depends on the sacrificial polystyrene removal pathway. The preservation of the TiO₂ nanocapsules was obtained essentially when the polystyrene was dissolved before the crystallization of the TiO₂.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Chimie
- Language
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- English
- Classification
- Chemistry
- License
- License undefined
- Identifiers
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- RERO DOC 305049
- DOI 10.1002/hlca.201700014
- Persistent URL
- https://folia.unifr.ch/unifr/documents/306009
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