Morpho-textural and fluorescence studies on Sio2 and SiO2@Ce3+

Elena-Mirela Picioruș, Cătălin Ianăși, Roxana Nicola, Paula Sfîrloagă, Paula Svera, Ana-Maria Putz, "Coriolan Dragulescu" Institute of Chemistry, 24 Mihai Viteazu Bvd., 300223, Timisoara, Romania", ""Coriolan Dragulescu" Institute of Chemistry, 24 Mihai Viteazu Bvd., 300223, Timisoara, Romania", ""Coriolan Dragulescu" Institute of Chemistry, 24 Mihai Viteazu Bvd., 300223, Timisoara, Romania", "National Institute for Research and Development in Electrochemistry and Condensed Matter, 144 Prof. Dr. Aurel Paunescu Podeanu Str., Timisoara, Romania", "National Institute for Research and Development in Electrochemistry and Condensed Matter, 144 Prof. Dr. Aurel Paunescu Podeanu Str., Timisoara, Romania", ""Coriolan Dragulescu" Institute of Chemistry, 24 Mihai Viteazu Bvd., 300223, Timisoara, Romania"
2020 Studia Universitatis Babe?-Bolyai Chemia  
Spherical silica xerogels were synthesized by Stöber route using tetra-ethyl-orthosilicate (TEOS) in order to obtain good properties for opto-electronic and catalytic applications. The reactants mole ratio was n TEOS: H2O: ETOH: NH3 (where n = 0.098 ÷ 0.26: 0.45: 0.789: 0.06). To study these properties, we know from literature, that nanoparticles under 100 nm show unique electrical, mechanical and optical properties. We have choosen the optimum sample, with the smaller surface area and
more » ... e area and particles size of 91 nm. To improve the optical properties, this sample was further doped with 0.1% Ce 3+ . The obtained xerogel was thermally treated at 300, 600 and 900 o C. The changes in properties were put in evidence by morpho-textural (N2 adsorptiondesorption isotherms and SEM images) and optical measurements (FT-IR, Fluorescence and Raman spectra's).
doi:10.24193/subbchem.2020.1.15 fatcat:fjk6qpikljh3pbfkwaeujesrsq