Synthesis and Characterization of Strontium Cerium Mixed Oxide Nanoparticles Using Plant Extract

Green synthesis of nanomaterials is an emphasis of recent developments. Herein, a facile and eco-friendly method for the synthesis of SrO–CeO2 mixed oxide NPs using ionic liquid (IL) assisted an ethanolic solution of Pedalium murex (PM) plant extract. NPs synthesized at room temperature using an ionic liquid (IL) as a mediator for the nucleation and growth process. SrO–CeO2 mixed oxide NPs system displaying nano rod like structure with 10–15 nm and high surface area that are confirmed by XRD, and SEM studies. GC-MS spectroscopy confirms the presence of N-Hexadecanoic acid (29%), 6-Octadecenoic acid, (Z) present in the plant extract that are capable to convert the corresponding metal ion precursor to SrO–CeO2 mixed oxide NPs. In FTIR the Ce–O and SrCO3 stretching bands were observed at 451 and 856 cm–1 respectively. Raman spectroscopy give stretching frequency at 457 and 159 cm–1 that proofs the presence of CeO2 and SrO present in the mixed oxide. The band gap energy of the SrO–CeO2 mixed oxide NPs was estimated as 3.17 eV from the UV-DRS spectroscopy. The anti-bacterial studies performed against a set of bacterial strains the result showed that SrO–CeO2 mixed oxide NPs more susceptible for gram negative (G–) bacteria then gram positive (G+) bacteria. A unique feature of the antioxidant behavior of NPs reduces the concentration of DPPH radical up to 89%. The toxicology behavior of SrO–CeO2 mixed oxide NPs found due to the high oxygen site vacancies, ROS formation, smallest particle size and higher surface area.