Effect of Hydrolysis Time on Grain Size and Properties of Cerium Oxide Nanoparticles Synthesized by Hydrolysis Assisted Co-Precipitation Method

2014 ◽  
Vol 6 (1) ◽  
pp. 94-98
Author(s):  
Ramasamy Srinivasan ◽  
Arumugam Chandra Bose
Keyword(s):  
Grain Size ◽  
Cerium Oxide ◽  
Precipitation Method ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Hydrolysis Time ◽  
Co Precipitation

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.

One-step synthesis and characterizations of cerium oxide nanoparticles in an ambient temperature via Co-precipitation method

2018 ◽  
Author(s):  
Malatesh S. Pujar ◽  
Shirajahammad M. Hunagund ◽  
Vani R. Desai ◽  
Shivaprasadgouda Patil ◽  
Ashok H. Sidarai
Keyword(s):  
Ambient Temperature ◽  
Cerium Oxide ◽  
Precipitation Method ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
One Step ◽  
Co Precipitation

Aqueous co-precipitation of Pd-doped cerium oxide nanoparticles: chemistry, structure, and particle growth

2011 ◽  
Vol 47 (1) ◽  
pp. 299-307 ◽  
Author(s):  
Hongying Liang ◽  
Joan M. Raitano ◽  
Guanghui He ◽  
Austin J. Akey ◽  
Irving P. Herman ◽  
...  
Keyword(s):  
Cerium Oxide ◽  
Particle Growth ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Co Precipitation

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.

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.

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