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Siliceous Materials for Immobilization of Photoheterotrophic Bacteria

Published online by Cambridge University Press:  13 September 2011

Mikolaj Stodolny ,
Michal Thiel ,
Marcin Wlodarczak  and
Marek Laniecki
Mikolaj Stodolny
Affiliation:
Department of Kinetics and Catalysis, Faculty of Chemistry, A. Mickiewicz University, 60-780 Poznan, Poland
Michal Thiel
Affiliation:
Department of Kinetics and Catalysis, Faculty of Chemistry, A. Mickiewicz University, 60-780 Poznan, Poland
Marcin Wlodarczak
Affiliation:
Department of Kinetics and Catalysis, Faculty of Chemistry, A. Mickiewicz University, 60-780 Poznan, Poland
Marek Laniecki
Affiliation:
Department of Kinetics and Catalysis, Faculty of Chemistry, A. Mickiewicz University, 60-780 Poznan, Poland
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Abstract

Preparation of transparent silica as potential carrier for photocatalysts and photosynthetic bacteria is presented. SiO2 was obtained by sol-gel techniques using tetraethyl orthosilicate as precursor. Glycol and glycerol were used as solvents. The increase of porosity of the studied materials was reached by application of soluble and commercial potato starch as a filler. Calcinations at 825 K for 6 hours removed all organic compounds. The rate of gelation was enhanced applying hydrochloric acid. Different materials were obtained in a series of syntheses with different concentrations of individual components. Transparency of the obtained materials varied between 50 and 97% (in range of λ 350 - 800 nm). Surface area varied between 300 and 400 m2/g and pore diameter was 5 – 18 nm. Samples were studied with SEM, nitrogen sorption at 77 K and UV-Vis spectroscopy. The obtained transparent materials with occluded TiO2 or CaTiO3 were tested in photocatalytic splitting of water.

Keywords

sol-gelSistructural
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1326: Symposium F – Renewable Fuels and Nanotechnology , 2011 , mrss11-1326-f06-02
Copyright
Copyright © Materials Research Society 2011

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References

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