AI Article Synopsis
- CeO2 nanoparticles were synthesized using a green method with Gloriosa superba L. leaf extract, resulting in nanoparticles with a cubic structure confirmed by X-ray diffraction.
- The nanoparticles were characterized as spherical with a size of 5nm, and various spectroscopic techniques confirmed their chemical composition and properties, including a band gap of 3.78eV.
- Antibacterial tests showed that the nanoparticles were more effective against Gram-positive bacteria compared to Gram-negative bacteria, and their toxicological behavior was linked to the uneven ridges and oxygen defects present in the nanoparticles.
Article 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.
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| http://dx.doi.org/10.1016/j.msec.2015.01.042 | DOI Listing |
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