preprint · Research Square (Research Square)
Abstract A simple technique was used to fabricate pure La 2 O 3 nanorods with a hexagonal structure using lanthanum (III) nitrate hexahydrate (La(NO 3 ) 3 .6H 2 O) and ammonia (NH 4 OH). The La 2 O 3 nanoparticles were characterized using XRD, TGA, Raman, SEM, FTIR, PL spectroscopy, and Mott-Schottky. XRD analysis showed the production of La(OH) 3 nanorods under appropriate conditions, which were then successfully converted into La 2 O 2 CO 3 and finally into La 2 O 3 nanorods by annealing. TGA revealed that the total weight loss was caused by water evaporation and the dissolution of the minimal quantity of moisture present in the manufactured La 2 O 3 NPs observed from the environment. The presence of functional groups was verified through FTIR analysis. Additionally, SEM revealed changes in morphology. PL findings displayed three emission peaks at 390, 520, and 698nm due to interband transitions and defects in the samples. Mott–Schottky analysis demonstrated that the flatband potential and acceptor density varied with annealing temperature, ranging from 1 to 1.2 V and 2 × 10 18 to 1.4×10 19 cm -3 , respectively. Furthermore, annealing at 1000 ° C resulted in the lowest resistance to charge transfer (Rct).
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DOI: 10.21203/rs.3.rs-3783038/v1
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