Photocatalytic activity of suspension sprayed ZnO-TiO2 coatings under ultraviolet and visible light irradiation

Wednesday, May 24, 2023: 4:10 PM
303A (Quebec City Convention Centre)
Dr. Anja Meyer , Fraunhofer Institute for Ceramic Technologies and Systems, IKTS, Dresden, Germany
Dr. Filofteia-Laura Toma , Fraunhofer Institute for Materials and Beam Technology, IWS, Dresden, Germany
Mr. Oliver Kunze , Technische Universität Dresden, Dresden, Germany, Fraunhofer Institute for Materials and Beam Technology, IWS, Dresden, Germany
Ms. Pratidhwani Biswal , Technische Universität Dresden, Dresden, Germany
Dr. Annegret Potthoff , Fraunhofer Institute for Ceramic Technologies and Systems, IKTS, Dresden, Germany
Prof. Christoph Leyens , Technische Universität Dresden, Dresden, Germany, Fraunhofer Institute for Materials and Beam Technology, IWS, Dresden, Germany
Due to their outstanding electrical and photocatalytic properties, thermally sprayed Zn2TiO4 coatings are of interest for various industrial applications. The expensive price of the Zn2TiO4 feedstock material prevents the coating from bringing it into the market. Suspension spraying is a cost-effective method to produce coatings in the binary ZnO-TiO2 system. Instead of using a costly blended Zn2TiO4 powder, aqueous suspensions containing fine dispersed ZnO and TiO2 particles, respectively are mixed at tailored composition and sprayed using the SHVOF-spraying process. Dense coatings with homogeneous distribution of elements are obtained. The coatings composition is analyzed via XRD and XRF measurements. UV-Vis spectroscopy measurements and photocatalytic tests of Rhodamin B degradation under UV and visible light radiation have been performed. The high potential to use appropriate binary suspension feedstock from ZnO and TiO2 to obtain Zn2TiO4-coatings with good microstructural and photocatalytic properties is presented.
See more of: Renewable Energies and Storage
See more of: Thermal Spray Applications