Biosynthesis of JC-La2CoO4 magnetic nanoparticles explored in catalytic and SMMs properties.

We have reported the synthesis of JC-La₂CoO₄ magnetic nanoparticles from Jatropha Curcas L. leaf extract in aqueous medium and potential application study in catalytic & Single Molecule Magnets (SMMs). Several techniques were used to investigate the structural, morphological, and elemental composition, particle size, optical properties, catalytic and magnetic properties by XRD, FTIR, SEM, EDAX, XPS, UV–visible and squid magnetic measurement. It was found that the crystallite sizes and grain sizes of JC-La₂CoO₄ NPs were 11.3 ± 1 and 24.1 ± 1 nm respectively and surface morphology of the nanoparticles looks spherical shape with good surface area. The band gap of JC-La₂CoO₄ was found to be 4.95 eV indicates good semiconductor in nature. XPS studies shows that La and Co present in + 3 and + 2 oxidation state respectively and suggest the composition formula is La₂CoO₄ with satisfied all the valency of metal ions. The photocatalytic efficiency of La₂CoO₄ shows good result against methylene blue (MB) compared to other dyes like MO, NO, RhB in presence of sunlight with rate constant 56.73 × 10^–3 min^-1 and completely degraded within 115 mints. The importance of JC-La₂CoO₄ has magnetic properties with antiferromagnetic coupling and SMMs properties with nature. [ABSTRACT FROM AUTHOR]