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In-situ nitrogen doping and boron modification of nanocrystalline titania powders by chemical vapour synthesis

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Author(s): Imteyaz Ahmad Md. | Subramshu S Bhattacharya | Horst Hahn

Journal: Processing and Application of Ceramics
ISSN 1820-6131

Volume: 3;
Issue: 3;
Start page: 113;
Date: 2009;
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Keywords: Chemical vapour synthesis | Doping | Titania

ABSTRACT
During the chemical vapour synthesis (CVS) of nanocrystalline titania doping and/or modification can be directly carried out in-situ by using an additional precursor. In this study, nitrogen doped nanocrystalline titania powders and boron modified nanocrystalline titania powders were synthesised by CVS. The resultant powders were characterised by X-ray diffraction (XRD) and UV-vis spectroscopy. In both cases, a red shift in the band gap of titania was seen. Electron paramagnetic resonance spectroscopy (EPR) showed the presence of nitrogen in the titania lattice. Solid state nuclear magnetic resonance (NMR) spectroscopy showed that boron in titania was present in BO4 coordination with the oxygen atoms.

Tango Jona
Tangokurs Rapperswil-Jona

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