Abstract
Nano-scaled spherical silica particles were directly coated with titania nanoparticles by means of heterocoagulation. Silica was prepared by the Stöber method, titania by a hydrolysis-condensation reaction of tetrapropyl-orthotitanate under acidic conditions. The photocatalytic activity of the coated spheres was investigated by a smog chamber technique, designed for the simulation of tropospheric photodegradation of hydrocarbons adsorbed on aerosol surfaces. In the chamber different solar spectra and irradiation intensities can be simulated and therefore the degradation can be monitored under different conditions. The degradation itself is dominated by OH radicals. Besides the monitoring, the reaction kinetics of particular hydrocarbon degradations was determined in the smog chamber. The steady-state concentration of OH radicals is higher in the presence of titania, and furthermore a heterogeneous photodegradation on the titania surface occurs.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Carp O, Huisman CL, Reller A (2004) Prog Solid State Chem 32:33
Anpo M, Dohshi S, Kitano M, Hu Y, Takeuchi M, Matsuoko M (2005) Annu Rev Mater Res 35:1
Berns B, Jentoft FC, Schlögl R (1999) Appl Catal B 20:155
Hermann JM, Guillard C, Disdier J, Lehaut C, Malato S, Blanco J (2002) Appl Catal B 35:281
Araña J, Herrera Melián JA, Doña Rodriguez JM, González Diaz O, Viera A, Pérez Peña J, Marrero Sosa PM, Espino Jiménez V (2002) Catal Today 76:279
Dalton JS, Janes PA, Jones NG, Nicholson JA, Hallam KR, Allen GC (2002) Environ Pollut 120:415
Tennakone K, Wijayantha KGU (2005) Appl Catal B 57:9
Strini A, Cassese S, Schiavi L (2005) Appl Catal B 61:94
Zhang XT, Sato O, Taguchi M, Einaga Y, Murakami T, Fujishima A (2005) Chem Mater 17:696
Caruso F (2004) Colloids and Colloid Assemblies. Wiley, Weinheim
Schmid G (2004) Nanoparticles. Wiley, Weinheim
Caruso F (2001) Adv Mater 13:11
Hsu WP, Yu R, Matijevic E (1994) J Colloid Interface Sci 156:56
Holgado M, Cintas A, Ibisate M, Serna CJ, Lopez C, Meseguer F (2000) J Colloid Interface Sci 229:6
Stöber W, Fink A, Bohn E (1968) J Colloid Interface Sci 26:62
Wilhelm P, Stephan D (2006) J Colloid Interface Sci 293:88
Bartlett JR, Woolfrey JL (1995) J Aust Ceram Soc 31:35
Bartlett JR, Woolfrey JL (1997) Ceram Trans 81:3
Dukhin AS, Goetz PJ (2002) Ultrasound for Characterizing Colloids. Elsevier, Amsterdam
Behnke W, Nolting F, Zetzsch C (1987) J Aerosol Sci 18:65
Behnke W, Holländer W, Koch W, Nolting F, Zetzsch C (1988) Atmos Environ 22:1113
Möller F (1973) Einführung in die Meteorologie Band 2. Wissenschaftsverlag, Mannheim
Winkler J (2003) Titandioxid. Vincentz Network, Hannover
Sun J, Gao L, Zhang Q (2003) J Am Ceram Soc 86:1677
Iler RK (1979) The Chemistry of Silica. Wiley, New York
Chen GC, Kuo CY, Lu SY (2005) J Am Ceram Soc 88:277
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 2006 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Wilhelm, P., Stephan, D., Zetzsch, C. (2006). Titania Coated Silica Nano-spheres as Catalyst in the Photodegradation of Hydrocarbons. In: Richtering, W. (eds) Smart Colloidal Materials. Progress in Colloid and Polymer Science, vol 133. Springer, Berlin, Heidelberg . https://doi.org/10.1007/3-540-32702-9_23
Download citation
DOI: https://doi.org/10.1007/3-540-32702-9_23
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-32701-1
Online ISBN: 978-3-540-32702-8
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)