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O: Fachverband Oberflächenphysik

O 81: Heterogeneous Catalysis III

O 81.1: Vortrag

Donnerstag, 20. März 2025, 10:30–10:45, H6

Cu Oxide Nanoparticles for Virus Inactivation — •Daniel Silvan Dolling^1,2, Miguel Blanco Garcia^1,2, Mona Kohantorabi¹, Mohammad Ebrahim Haji Naghi Tehrani^1,2, Jan-Christian Schober^1,2, Ming-Chao Kao^1,2, Jagrati Dwivedi¹, Arno Jeromin¹, Thomas F. Keller¹, Olof Gutowski³, Dimitry V. Novikov³, Andreas Stierle^1,2, and Heshmat Noei¹ — ¹Centre for X-ray and Nano Science CXNS, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany — ²Fachbereich Physik, Universität Hamburg, Jungiusstraße 11, 20355 Hamburg, Germany — ³Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany

TiO₂ is known to inactivate SARS-CoV-2 photocatalytically under UV light. Recently, it has been shown that Cu oxide on Titania shifts the photoactivty into the visible light region. The specific oxidation state of Cu is paramount for the photocatalyst efficiency. Here, we use single crystalline TiO₂ to investigate the effects of growth conditions of Cu nanoparticles (NPs). To this cause, we employ X-ray diffraction (XRD) and scanning electron microscopy (SEM), revealing a temperature-dependent morphology. Subsequently, we analyze the short- and long-term oxidation behavior with X-ray photoelectron spectroscopy (XPS) and scanning Auger microscopy (SAM). Finally, we investigate the interaction of the NPs with asparagine amino acid using reflection-absorption infrared spectroscopy (IRRAS) and grazing-incidence small-angle scattering (GISAXS).

Keywords: TiO2; Photocatalysis; Oxidation; Nanoparticle; Growth