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Scalable synthesis of smooth PS@TiO2 core-shell and TiO2 hollow spheres in the (sub) micron size range: understanding synthesis and calcination parameters

Title data

Lechner, Anna M. ; Feller, Tanja ; Song, Qimeng ; Kopera, Bernd A. F. ; Heindl, Lukas ; Drechsler, Markus ; Rosenfeldt, Sabine ; Retsch, Markus:
Scalable synthesis of smooth PS@TiO2 core-shell and TiO2 hollow spheres in the (sub) micron size range: understanding synthesis and calcination parameters.
In: Colloid and Polymer Science. (2020) .
ISSN 0303-402X
DOI: https://doi.org/10.1007/s00396-020-04626-3

Official URL: Volltext

Abstract in another language

Hollow spheres made from titanium dioxide (TiO2) are interesting structures because of their high surface area and low density, combined with semiconducting properties of the TiO2. However, the synthesis is still challenging because of the high reactivity of the titania precursors. Here, we present a simple, reproducible, and scalable way to synthesize TiO2 hollow spheres in the micrometer/sub-micrometer size range comprising three steps: synthesis of polystyrene template particles, growth of TiO2 shells, and calcination to hollow spheres. We investigate the importance of adjusting the seed particle surface functionalization via the appropriate choice of comonomer during the dispersion polymerization. An aging step and a calcination process at low temper- atures are mandatory to retain the particle integrity during the seed particle removal. We provide a detailed characterization of each step of this process including electron microscopy, small angle X-ray scattering, and simultaneous thermal analysis.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Titania hollow spheres; Dispersion polymerization; Calcination parameters
Nanoparticles; Thermal decompositioN
Institutions of the University: Profile Fields > Advanced Fields > Polymer and Colloid Science
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG
Research Institutions > EU Research Projects > VISIRday
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Research Institutions > EU Research Projects
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 23 May 2020 21:00
Last Modified: 27 May 2020 11:09
URI: https://eref.uni-bayreuth.de/id/eprint/55211