Topochemical fluorination and defluorination as a method to develop novel photocatalysts with tailored optical properties
Topochemical fluorination and defluorination as a method to develop novel photocatalysts with tailored optical properties
Institute for Materials Science, Chemical Material Synthesis
shama.perween@imw.uni-stuttgart.de
Dr. Shama Perween is currently working as a researcher funded by DFG (Eigene Stelle) within the research group of Prof. Dr. Oliver Clemens. She is developing an indate-based Ruddlesden-Popper (RP) type materials (Figure 1 (a)), LnAEInO4 (Ln = lanthanides, Y; Alkaline Earth = Ca, Sr, Ba), via chemical approaches with different synthesis methods (sol-gel, hydrothermal, nebulised spray pyrolysis, solid-state) in order to achieve phase pure compounds with high surfaces and distinguished morphologies suitable for the photocatalytic applications (Figure 1 (b)). The main objective of her project is to study systematic changes on topochemical- fluorination/defluorination of developed RP phase pure materials as a vehicle to tune the optical bandgap of the materials and to develop understanding of the respective structural and optical changes. The obtained oxides, oxyfluorides, and reductively defluorinated oxyfluorides will be investigated to be used for the solar energy harvesting such as water-splitting for H2 generation as well as dye-degradation.
