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Spectroscopic characterization of SnO2 gels |
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| Authors: | Sidney J L Ribeiro Celso V Santilli Sandra H Pulcinelli Fábio L Fortes Luiz F C De Oliveira |
| Institution: | (1) Instituto de Química/UNESP, P.O. Box 355, 14800-900 Araraquara, SP, Brazil;(2) Instituto de Química/USP, P.O. Box 20780, 01498-000 São Paulo, SP, Brazil |
| Abstract: | Excitation and dynamic emission spectra of Eu3+ ions were simultaneously used with FTIR and Raman spectroscopy to study the structural evolution during SnO2 sol  gel xerogel conversion. Results make evident an increase of the surroundings symmetry for the Eu3+ ions dissolved in SnO2 matrix and a decrease of the amount of hydroxo groups (Sn-OH) during drying. These phenomena were associated to the pursuit of the condensation reaction after gelation. |
| Keywords: | tin oxide hydrogel optical spectroscopy gel drying |
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