title: Synthesis of cerium oxide nanoparticles using Gloriosa superba L. leaf extract and their structural, optical and antibacterial properties.
abstract: CeO2 nanoparticles (NPs) were green synthesized using Gloriosa superba L. leaf extract. The synthesized nanoparticles retained the cubic structure, which was confirmed by X-ray diffraction studies. The oxidation states of the elements (C (1s), O (1s) and Ce (3d)) were confirmed by XPS studies. TEM images showed that the NPs possessed spherical shape and particle size of 5nm. The Ce-O stretching bands were observed at 451cm(-1) and 457cm(-1) from the FT-IR and Raman spectra respectively. The band gap of the CeO2 NPs was estimated as 3.78eV from the UV-visible spectrum. From the photoluminescence measurements, the broad emission composed of eight different bands were found. The antibacterial studies performed against a set of bacterial strains showed that Gram positive (G+) bacteria were relatively more susceptible to the NPs than Gram negative (G-) bacteria. The toxicological behavior of CeO2 NPs was found due to the synthesized NPs with uneven ridges and oxygen defects in CeO2 NPs.
authors: Department of Nanoscience and Technology, Alagappa University, Karaikudi 630 004, Tamil Nadu, India. Electronic address: sixmuga@yahoo.com.
authors: Ayyakannu
authors: A
authors: Arumugam
authors: PG and Research Department of Physics, Jamal Mohamed College, Tiruchirappalli 620 020, Tamil Nadu, India.
authors: Chandrasekaran
authors: C
authors: Karthikeyan
authors: PG and Research Department of Physics, Jamal Mohamed College, Tiruchirappalli 620 020, Tamil Nadu, India.
authors: Abdulrahman Syedahamed
authors: AS
authors: Haja Hameed
authors: Department of Nanoscience and Technology, Alagappa University, Karaikudi 630 004, Tamil Nadu, India.
authors: Kasi
authors: K
authors: Gopinath
authors: Department of Nanoscience and Technology, Alagappa University, Karaikudi 630 004, Tamil Nadu, India.
authors: Shanmugam
authors: S
authors: Gowri
authors: Department of Nanoscience and Technology, Alagappa University, Karaikudi 630 004, Tamil Nadu, India.
authors: Viswanathan
authors: V
authors: Karthika
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002563:Cerium / Q000737:chemistry*; D019668:Liliaceae / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles; D018515:Plant Leaves / Q000737:chemistry*; D013057:Spectrum Analysis; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D002563:Cerium; C030583:ceric oxide
keywords: Antibacterial activity; Cerium oxide nanoparticles; Gloriosa superba; Green synthesis; Raman spectroscopy; X-ray photoelectron spectroscopy