Abstract
Nanoparticles of cerium oxide CeO2 are important nanomaterials with remarkable properties for use in both industrial and non-industrial fields. In a general way, doping of oxide nanometric with transition metals improves the properties of nanoparticles. In this study, nickel- doped cerium oxide nanoparticles were synthesized from Stevia rebaudiana extract. Both doped and non-doped nanoparticles were characterized by X-ray diffraction, Field Emission Scanning Electron Microscopy, Energy Dispersive X-ray, Raman spectroscopy, and Vibrating-Sample Magnetometry analysis. According to X-ray diffraction, Raman and Energy Dispersive X-ray crystalline and single phase of CeO2 and Ni doped CeO2 nanoparticles exhibiting fluorite structure with F2g mode were synthesized. Field Emission Scanning Electron Microscopy shows that CeO2 and Ni doped nanoparticles have spherical shape and sizes ranging of 8 to 10 nm. Ni doping of CeO2 results in an increasing of magnetic properties. The enhancement of ultraviolet protector character via Ni doping of CeO2 is also discussed.
Highlights
Nowadays, research and development of products in the nanotechnology field has been steadily increased, in specific due to innovative and beneficial properties of materials at the nanoscale.nanotechnology as a flexible tool can be applied in electrical devices, construction of composite materials, catalysts and antibacterial coatings [1]
All synthesized powders are nanometric in size, being the
S. rebaudiana extract acts as a capping and stabilizing agent for the synthesis of nanoparticles, because of the compounds such terpenoids, tannins in synthesis its leaves.ofHence, cerium
Summary
Research and development of products in the nanotechnology field has been steadily increased, in specific due to innovative and beneficial properties of materials at the nanoscale. Nanotechnology as a flexible tool can be applied in electrical devices, construction of composite materials, catalysts and antibacterial coatings [1]. Molecules 2019, 24, 4424 surface-to-volume ratios [2]. Nanoparticles provide a higher surface area-to-volume ratio through reduction of their particle size, which increases their efficacy in biological media. Cerium oxide nanoparticles can be utilized in sensors, catalysts, sunscreens, ultraviolet physical absorbers and sun cells [3,4], because of their high thermal stability, wide band-gap and rapid changing of oxidation states between Ce (III) and Ce (IV) [3]
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