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Laser kinetic spectroscopy of the interfacial charge transfer between membrane cell walls of E. coli and TiO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
28560 44080 2006 7 PDF Available
Title
Laser kinetic spectroscopy of the interfacial charge transfer between membrane cell walls of E. coli and TiO2
Abstract

This laser kinetics features of the electron decay of TiO2 in the presence of the Escherichia coli (E. coli) phosphatidyl-ethanolcholine (PE) and lipo-polysaccharides (LPS) cell wall components were are reported in this study. The interaction of the biomolecules with the photogenerated charge carriers was determined and the reaction rates were measured. The effect of the variation of ionic strength of the colloidal TiO2 on the electron decay was determined in the presence of PE and E. coli. The ionic strength seems to affect the equilibrium absorption of the biomolecules on TiO2. The e− decay was measured for TiO2 samples having different sizes, charge and isoelectric points (IEP) by laser spectroscopy for different types of TiO2. TiO2 Degussa P-25 mediated the E. coli abatement most effectively compares to other TiO2 samples. The structural features of different TiO2 samples were related to the degradation of E. coli and also related to the fast kinetics results.

Keywords
Photocatalysis; TiO2; E. coli; Bacteria; Interface
First Page Preview
Laser kinetic spectroscopy of the interfacial charge transfer between membrane cell walls of E. coli and TiO2
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 181, Issues 2–3, 31 July 2006, Pages 401–407
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering