scholarly journals Highly antimicrobial activity of cerium oxide nanoparticles synthesized using Moringa oleifera leaf extract by a rapid green precipitation method

2021 ◽  
Author(s):  
Gusliani Eka Putri ◽  
Yetria Rilda ◽  
Syukri Syukri ◽  
Arniati Labanni ◽  
Syukri Arief
Keyword(s):  
Antimicrobial Activity ◽  
Cerium Oxide ◽  
Leaf Extract ◽  
Moringa Oleifera ◽  
Precipitation Method ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles

scholarly journals Revealing the Effect of Synthesis Conditions on the Structural, Optical, and Antibacterial Properties of Cerium Oxide Nanoparticles

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2596
Author(s):  
Nicusor Fifere ◽  
Anton Airinei ◽  
Marius Dobromir ◽  
Liviu Sacarescu ◽  
Simona I. Dunca
Keyword(s):  
Cerium Oxide ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Antibacterial Properties ◽  
Morphological Characteristics ◽  
Precipitation Method ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
X Ray ◽  
Gap Energy

Cerium oxide nanoparticles were prepared by a precipitation method using Ce(IV) sulphate as precursor dispersed in glycerol with varying synthesis parameters such as temperature or precipitating agent. The structural and morphological characteristics of the obtained nanoparticles were investigated by X-ray diffraction, transmission electron microscopy, and diffuse reflectance spectroscopy. The crystallite size of the nanoparticles varied between 13 and 17 nm. The presence of Ce3+ and Ce4+ was proved by XPS data in the CeO2 samples and the conservation of the fluorite structure was evinced by X-ray diffractograms with a contraction of the lattice parameter, regardless of the size of the nanoparticle. From diffuse reflectance spectra, two band gap energy values for the direct transition were observed. Depending on the synthesis condition, the red shift of gap energy and the blue shift of Urbach energy with increasing content of Ce3+ were ascertained. The antibacterial tests revealed that the cerium oxide nanoparticles show good antimicrobial activity towards the common pathogens Escherichia coli and Staphylococcus aureus.

Cerium Oxide Nanoparticles Catalyst for the Oxidation of Methanol

2019 ◽  
Vol 35 (5) ◽  
pp. 1539-1545
Author(s):  
Hossein Bayahia
Keyword(s):  
Cerium Oxide ◽  
Methanol Conversion ◽  
Precipitation Method ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxidation Of Methanol ◽  
Co Precipitation ◽  
Cerium Oxide Catalyst

This study outlines the synthesis of cerium oxide nanoparticles, their characterization and their activity in the oxidation of methanol. A simple and easy co-precipitation method was used for the preparation of cerium oxide, without any added surfactants. The physicochemical properties of the sample were studied using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). The morphology and size of the catalyst was studied using SEM. EDX confirms the element content of the synthesized cerium oxide. The structure of CeO2 was confirmed using XRD. Thus, the reported CeO2 was an active catalyst for methanol oxidation to form formaldehyde at a temperature range of 523–753K in the gas phase. At 753K, the cerium oxide catalyst gave 53% formaldehyde selectivity, 57% methanol conversion and 31% formaldehyde yields.

Synthesis of Cerium Oxide Nanoparticles by the Precipitation Method

2009 ◽  
Vol 610-613 ◽  
pp. 233-238 ◽  
Author(s):  
Qiu Li Zhang ◽  
Zhi Mao Yang ◽  
Bing Jun Ding
Keyword(s):  
Cerium Oxide ◽  
Experimental Results ◽  
Cerium Nitrate ◽  
Raw Material ◽  
Precipitation Method ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Reactant Concentration ◽  
Oxide Particles

Cerium oxide nanoparticles with sphere-like in shape were synthesized by precipitation method, using cerium nitrate as raw material and ammonium acid carbonate as precipitation agent. Effects of reactant concentration, supersonic wave and dispersant agent on properties of the cerium oxide particles were investigated. Experimental results showed that the dispersant agent played important roles on the size of resulting particles. Besides, supersonic wave prevented the precipitate from agglomerateing partially.

Synthesis of cerium oxide nanoparticles using Gloriosa superba L. leaf extract and their structural, optical and antibacterial properties

2015 ◽  
Vol 49 ◽  
pp. 408-415 ◽  
Author(s):  
Ayyakannu Arumugam ◽  
Chandrasekaran Karthikeyan ◽  
Abdulrahman Syedahamed Haja Hameed ◽  
Kasi Gopinath ◽  
Shanmugam Gowri ◽  
...  
Keyword(s):  
Cerium Oxide ◽  
Leaf Extract ◽  
Antibacterial Properties ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Gloriosa Superba

scholarly journals The Anti-oxidant and Anti-inflammatory Properties of Cerium Oxide Nanoparticles Synthesized Using Origanum majorana L. Leaf Extract

2019 ◽  
Vol 4 (3) ◽  
pp. 108-112
Author(s):  
Ali Es-haghi ◽  
Saynaz Aseyd Nezhad
Keyword(s):  
Free Radicals ◽  
Cerium Oxide ◽  
Leaf Extract ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Gene Expressions ◽  
Frap Assay ◽  
Anti Oxidant ◽  
Anti Inflammatory ◽  
Origanum Majorana

Introduction: Free radicals have singlet electron in their outer layer rendering them high reactivity against biomolecules (i.e., DNA, carbohydrates, proteins, and lipids). Oxidative stress is created when the production of free radicals exceeds their removal by antioxidant systems and is involved in the pathogenesis of several diseases such as diabetes, arthritis, inflammatory conditions, and various cancers. Regarding the therapeutic potential of nanoparticles (NPs) in human diseases, the purpose of this study was to synthesize cerium oxide NPs using Origanum majorana leaf extract. Methods: Cerium oxide nanoparticles (CeO2 -NPs) were synthesized using aqueous leaf extract of O. majorana. The sizes of NPs were characterized by a particle size analyzer. The antioxidant properties of the CeO2 -NPs were determined by Ferric-reducing antioxidant power (FRAP) assay. The anti-inflammatory effects of the NPs were also determined by measuring gene expressions of IL-1β and IL-10 using real-time polymerase chain reaction (PCR). Results: The CeO2 -NPs were successfully synthesized using O. majorana leaf extract. The results of FRAP assay showed that the anti-oxidant activities of CeO2 -NPs at concentrations of 50, 100, and 400 μg/mL were 75%, 77.1%, and 94.5%, respectively. Moreover, interleukin 10 (IL-10) gene expressions increased by 4.6 folds while the expression of IL-1β gene decreased by 0.75-fold in HUVECs. Conclusion: The CeO2 -NPs synthesized using the aqueous extract of O. majorana demonstrated antioxidant and anti-inflammatory properties. Therefore, these NPs can be used as potential therapeutic agents in medicine.

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