@inproceedings{d619d32ad3c240419dd2ab839332598d,
title = "WAXS and PDF-based analyses of chromium doping in nanocrystalline titania (anatase and brookite)",
abstract = "Chromium-doped (0.5-10 % Cr:Ti molar ratio) nanocrystalline titania (5-6 nm) prepared via sol-gel method was examined by synchrotron-based wide angle x-ray scattering (WAXS) for crystal structure determination. Atomic pair-distribution functions (PDF) for both raw and heattreated samples were obtained by Fourier transforms of the WAXS data. The PDF data were fitted using structural models of nanocrystalline titania that considered phase compositions, lattice parameters, atomic positions and thermal factors. The unit cell of Cr-doped nanocrystalline titania expanded 1-2 % with respect to bulk titania as a consequence of the substitution of Ti by Cr and the generation of oxygen vacancies. We observed a lattice contraction after heat-treatment that may be caused by the redistribution of Cr atoms to nanoparticle surfaces during phase transformation and particle coarsening.",
author = "Hengzhong Zhang and Benjamin Gilbert and Bin Chen and Banfield, {Julian F.}",
year = "2006",
doi = "10.1557/proc-0915-r07-02",
language = "English",
isbn = "9781558998711",
series = "Materials Research Society Symposium Proceedings",
publisher = "Materials Research Society",
pages = "237--242",
booktitle = "Nanostructured Materials and Hybrid Composites for Gas Sensors and Biomedical Applications",
address = "United States of America",
note = "Materials Research Society Symposium (MRS) 2006 (Spring), MRS 2006 Spring ; Conference date: 17-04-2006 Through 21-04-2006",
}