XANES and XEOL studies of Eu-doped calcium tungstate in silica synthesized by sol-gel method

doi:10.1088/1742-6596/190/1/012078

XANES and XEOL studies of Eu-doped calcium tungstate in silica synthesized by sol-gel method

J Y Peter Ko et al 2009 J. Phys.: Conf. Ser. 190 012078 (4pp) doi: 10.1088/1742-6596/190/1/012078

PDF (456 KB) | References

J Y Peter Ko¹, Yongfeng Hu², Lidia Armelao³ and Tsun-Kong Sham^1,4
¹ The Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
² Canadian Light Source Inc., The University of Saskatchewan, 101 Perimeter Road, Saskatoon, SK S7N 0X4, Canada
³ Department of Chemistry, University of Padova, via Marzolo 1, 35131 Padova, Italy
⁴ To whom any correspondence should be addressed
E-mail: tsham@uwo.ca

Abstract. Europium-doped calcium tungstate (CaWO₄:Eu) was synthesized by a modified Pechini method. X-ray absorption near-edge structure (XANES) and X-ray excited optical luminescence (XEOL) was employed to probe the chemical and luminescence properties of CaWO₄:Eu. XANES results demonstrate that the chemical environment around calcium in the doped CaWO₄ is similar to that of undoped CaWO₄. On the other hand, chemical environment around oxygen is very different. Moreover, the results suggest that contributions to luminescence in the sample are from both silica (from silica matrix) and CaWO₄. Using XEOL, luminescence pathways and efficiency associated with the system can be identified.

Post to CiteUlike |

Post to Connotea |

Post to Bibsonomy

XANES and XEOL studies of Eu-doped calcium tungstate in silica synthesized by sol-gel method

Find related articles

Article options

Authors & Referees