Investigation of vanadium–sodium silicate glasses using XANES spectroscopy |
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| Authors: | M Faiz A Mekki BS Mun Z Hussain |
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| Institution: | 1. Surface Science Laboratory, Physics Department, KFUPM, Dhahran, Saudi Arabia;2. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA |
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| Abstract: | X-ray absorption near edge structure spectroscopy has been used to investigate the electronic and atomic structure of (V2O5)x(Na2O)0.30(SiO2)0.70−x (x < 0.1) glasses obtained by melt-quench technique. The results show no sign of metallic clustering of V atoms, but mixed oxidation states (+4 and +5) of V and strong V3d–O2p hybridization in the glasses. Detailed analysis has revealed that the glass samples contain about 15% V4+ and 85% V5+ and the ligand-field splitting is about 1.6 eV. |
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| Keywords: | XANES Vanadium&ndash sodium silicate glasses V L2 3 edges O K edge |
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