Dresden 2017 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 39: Thin Film Applications

DS 39.10: Vortrag

Donnerstag, 23. März 2017, 12:00–12:15, CHE 91

A Novel Approach to Monitor Surface Driven Photocatalysis Reactions at Titania-Organic Dye Interfaces — •Cenk Aktas, Muhammad Zubair Ghori, Mohammed Emami, Alexander Wahl, Oleksandr Polonskyi, Thomas Strunskus, and Franz Faupel — Institute for Materials Science, Chair for Multicomponent Materials, Faculty of Engineering, Christian-Albrechts-University of Kiel, Kaiserstraße 2, D-24143 Kiel, Germany

Titania is one of semi-conductor oxides which has been extensively studied in the past due to its high photocatalytic activity. On the other hand there is still a lack of knowledge in understanding mechanism of titania photocatalysis. Basically the degradation of an organic dye is monitored by time in terms of its optical absorption to analyse the photocatalytic activity. Most of these analyses are carried out in wet environment and there is relatively less study on characterisation of photocatalytic activity in gas or solid phase. While former gives an indirect measure, later may provide details of the surface reactions taking place directly at the titania-organic layer interface. This work covers a novel analytic approach to investigate details of the photocatalytic reaction at the titania surface using a dry test medium (organic dye in the form of a thin film). A comparative study between the wet and dry analysis approaches is also provided to understand the overall mechanism involved in the photocatalysis.