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UV-Absorption and Silica/Titania Colloids Using a Core–Shell Approach

An Erratum to this article was published on 01 April 2010

Abstract

Metal-oxo-colloids have been prepared using tetraethoxysilane (TEOS) oligomers with titanium tetra-i-propoxide (TIP) or titanium (di-i-propoxide) bis(acetylacetonate) (TIA) precursors. Transmission electron microscopy (TEM), FTIR, UV-Vis, and photoluminescence spectroscopy were used to investigate the composition, the size, and optical properties of the Si/Ti core–shell colloids. The presence of hetero-bonded silicate structure (Si–O–Ti) was indicated by FTIR spectroscopy. The size of Si/TIP system ranged from 55 to 120 nm and Si/TIA system ranged from 220 to 250 nm. The TEM data indicated that the size of colloids can be controlled by the TIP or TIA content. The Si/Ti system exhibited strong absorption in the UV-range, yet had excellent optical transmittance in the visible range. The Si/Ti systems exhibited a photoluminescence emission at 329 nm.

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Correspondence to Mark D. Soucek.

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An erratum to this article can be found at http://dx.doi.org/10.1007/s12633-010-9048-5

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Zhou, L., Heinz, H., Soucek, M.D. et al. UV-Absorption and Silica/Titania Colloids Using a Core–Shell Approach. Silicon 2, 95–104 (2010). https://doi.org/10.1007/s12633-009-9030-2

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  • DOI: https://doi.org/10.1007/s12633-009-9030-2

Keywords

  • Silica
  • Colliod
  • Sol–Gel
  • Photoluminescence