Berlin 2024 – scientific programme

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O: Fachverband Oberflächenphysik

O 33: Poster: Supported Nanoclusters and Catalysis

O 33.3: Poster

Tuesday, March 19, 2024, 18:00–20:00, Poster C

Investigation of highly efficient black titania nanotube photocatalyst by soft X-ray spectroscopy — •Hesham Hamad¹ and Giuliana Aquilanti² — ¹Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, 21934, Alexandria, Egypt — ²Elettra – Sincrotrone Trieste, s.s. 14 - km 163,5 in AREA Science Park, 34149 Basovizza, Trieste, Italy

The recent discovery of black TiO2 nanoparticles with enhancing solar absorption will trigger an explosion of interest; but black TiO2 nanoparticles remain a mystery. Here we elucidate more properties and try to understand the inner workings of black TiO2 nanotubes with hydrogenated disorders in a surface layer surrounding a crystalline core. In this work, TiO2 nanotubes (TNT) and its black hydrogenated TiO2 nanotubes (BTNT) were synthesized and investigated by characterization techniques. The merit of this project is to investigate the prepared synchrotron-based X-ray absorption fine structures (XAFS). It probed the unoccupied and occupied molecular orbitals of densities of states for O 2p and Ti 3d hybrid orbital characteristics, respectively. The reduction behavior and electronic and crystalline structure of a series of TNT and BTNT as photocatalysts will be investigated by using synchrotron-based XAFS. These techniques provide novel opportunities for tackling the structure and the dynamics of chemical and physical systems in solution.

Keywords: Black Titania; Nanotubes; Oxygen vacancy; XAFS; Soft X-ray Beamline