Akademik Veri Yönetim Sistemi
ChemistrySelect, cilt.10, sa.32, 2025 (SCI-Expanded)
Lanthanum hydroxide and oxide nanowires have been successfully synthesized using hydrothermal technique. This study systematically investigates the effects of hydrothermal aging temperature, time, and different alkaline sources (NH3, Na2CO3, NaOH, KOH) on the morphology and crystallinity of La(OH)3 and La2O3 nanowires. To our knowledge, this is the first comparative study examining the impact of these four alkaline sources in a controlled hydrothermal environment. The as-prepared samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), and N2 adsorption–desorption (BET) measurements. The results indicate that increasing hydrothermal temperature and time leads to thinner and longer La(OH)3 nanowires, with diameters as small as 40 nm and lengths extending up to 3 µm. The average crystallite size increased from 11.6 nm to 18.9 nm with higher temperature and prolonged aging, while the BET surface area decreased from 35.4 to 17.2 m2/g. Ammonia-based synthesis resulted in the highest surface area (25.8 m2/g) and total pore volume (0.083 cm3/g), whereas sodium carbonate yielded the lowest values (10.3 m2/g, 0.035 cm3/g). These findings emphasize the importance of optimizing hydrothermal conditions and selecting suitable alkaline sources to achieve the desired nanowire morphology and properties.