Presentation Information
[8a-N403-6]Influence of the Up-Conversion Effect on the Photocatalytic Activity of NaLuF4:Yb:Ho@NaLuF4:Yb:Nd@TiO2 Core–Shell Structures under Visible Light Irradiation
〇(PC)Joanna Nadolna1,2, Routian Chen1,3, Pawel Mazierski2, Zhishun Wei4, Tomasz Grzyb5, Patrycja Szwedowska2, Prajakta Kokate1, Keshav Dani1 (1.Okinawa Inst. of Sci. and Tech. Grad. Univ., 2.Univ. of Gdansk, 3.Dalian Inst. of Chem. Phys., 4.Hubei Univ. of Tech., 5.Adam Mickiewicz Univ.)
Keywords:
photocatalysis,TiO2,lanthanides
Harnessing visible (Vis) and near-infrared (NIR) light is key for solar-driven photocatalysis. We report the design and synthesis of NaLuF4:Yb:Ho@NaLuF4:Yb:Nd@TiO2 core–shell upconversion particles (UCPs) for enhanced activity under Vis–NIR light. Structural analyses confirmed TiO2 coating; EDX/XPS showed uniform lanthanide distribution. DRS revealed Nd/Yb absorption enabling NIR-to-UV upconversion. Photoluminescence confirmed energy transfer from Yb/Nd to Ho, influenced by TiO2 interface. Photocatalytic tests (phenol degradation) showed higher activity of UCP–TiO2 vs. bare TiO2 under Vis–NIR light, due to UV upconversion and TiO2 modifications enhancing charge separation and reducing recombination. Results highlight UCP–TiO2 composites' potential for solar-driven environmental remediation and guide the design of Vis–NIR-responsive materials.