JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 62 No 1 (2017): Journal of the Chilean Chemical Society
Original Research Papers

INCLUSION OF [H3PW12O40] AND [H4SiW12O40] INTO A SILICA GEL MATRIX VIA “SOL-GEL” METHODOLOGY

Matías Reyes López
Universidad Andres Bello, Centro de Nanociencias Aplicadas (CENAP)
Alejandro Pizarro Luna
Universidad Andres Bello, Centro de Nanociencias Aplicadas (CENAP)
Ignasi Mata
Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB
Elies Molins
Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus UAB
Desmond Macleod Carey
Universidad Autonoma de Chile, Facultad de Ingeniería, Inorganic Chemistry and Molecular Materials Center
Published June 5, 2017
Keywords
  • Silica Gel,
  • Polyoxometalates,
  • Aerogel,
  • Lyogel,
  • Keggin
How to Cite
Reyes López, M., Pizarro Luna, A., Mata, I., Molins, E., & Macleod Carey, D. (2017). INCLUSION OF [H3PW12O40] AND [H4SiW12O40] INTO A SILICA GEL MATRIX VIA “SOL-GEL” METHODOLOGY. Journal of the Chilean Chemical Society, 62(1). Retrieved from https://jcchems.com/index.php/JCCHEMS/article/view/140

Abstract

Here we report the inclusion of two Keggin Polyoxometalates (POMs), [H3PW12O40] and [H4SiW12O40], into silica gels by integrating them during the preparation of the SiO2 matrix via “sol-gel” methods. Aerogels were produced by supercritical drying of the wet gels impregnated with the POMs, and lyogels were obtained by means of a lyophilization process. These materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transformed infrared (FT-IR) spectroscopy and thermoanalytical techniques (TGA-DSC). We found that a large fraction of POMs are lost during the aging time, and solvent exchange for lyophilization. However the thermal stability of the bare matrix is modified by the inclusion of POMs. Some aggregates with a high content of POMs were found via SEM-EDX. 

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