Visible Light Photo-Oxidations in the Presence of Bismuth Oxides Der Naturwissenschaftlichen Fakultät der Friedrich-Alexander-Universität Erlangen-Nürnberg zur Erlangung des Doktorgrades vorgelegt von Joachim Eberl aus Aachen Als Dissertation genehmigt von der Naturwissenschaftlichen Fakultät der Universität Erlangen-Nürnberg. Tag der mündlichen Prüfung: 18.07.2008 Vorsitzender der Promotionskommission: Prof. Dr. Eberhard Bänsch Erstberichterstatter: Prof. Dr. Horst Kisch Zweitberichterstatter: Prof. Dr. Dirk M. Guldi ACKNOWLEDGEMENT First of all I would like to thank my doctoral adviser Prof. Dr. Horst Kisch for offering me this interesting and young topic, his skilled supervision, many fruitful discussions and the generous support of my work which could be finished successfully. Many hands are needed for receiving and proving the results of the herein described investigations. I thank Susanne Hofmann for XRD measurements, Dr. Cornelia Damm for photovoltage measurements, Christina Wronna for elemental analyses, Siegfried Smolny for surface area measurements, Martin Bachmüller for mass spectroscopy, Ronny Wiefel for glass work, and Uwe Reißer for his help with electronic problems. Manfred Weller, Peter Igel and their trainees from the machine shop are acknowledged for their overall assistance with technical problems.