P-049

Monika Baublytė

monika.baublyte@chgf.stud.vu.lt

Maria Luisa Saladino,  Enrico Paradisi , Cristina Leonelli , Cecilia Mortalo , Francesco Armetta, Ramūnas Skaudžius

Department of Inorganic Chemistry, Vilnius University, Lithuania

Formation and Morphology Control of GdPO4:Eu Nanoparticles via In Situ Hydrothermal Synthesis in Wood-Derived Organic Media

This study explores the in situ hydrothermal synthesis of europium-doped gadolinium phosphate (GdPO4:Eu) nanoparticles within a wood matrix, utilizing degradation products of lignin, hemicellulose, and cellulose as an organic-rich environment for nanoparticle growth. By systematically varying precursor concentrations, we investigated their impact on crystal structure and particle morphology. X-ray diffraction (XRD) analysis revealed enhanced crystallinity and crystallite size with increasing precursor levels. Transmission Electron Microscopy (TEM) showed consistent formation of three distinct morphologies: nanosticks, agglomerated nanoparticles, and single nanocrystals. Nuclear Magnetic Resonance (NMR) spectroscopy of residual solutions demonstrated the presence of formic and acetic acids and suggested complex interactions between paramagnetic Gd³⁺ ions and organic compounds. These findings suggest that organic byproducts and synthesis conditions together influence nanoparticle morphology. The work offers insight into sustainable routes for multifunctional nanomaterials using wood as a reactive template.