scholarly journals Development of Anti-Aging and Anticorrosive Nanoceria Dispersed Alkyd Coating for Decorative and Industrial Purposes

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 610 ◽  
Author(s):  
Ezgi Kızılkonca ◽  
F. Bedia Erim
Keyword(s):  
Cerium Oxide ◽  
Electrochemical Impedance ◽  
Salt Spray ◽  
Mechanical Tests ◽  
Standard Test ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Oxide Particles ◽  
The Impact ◽  
Alkyd Coatings

This study focuses on nano cerium oxide particles as alternative additives in solvent-based alkyd coatings in order to improve anticorrosive and anti-aging properties. The paint samples were formulated with cerium oxide micro and nanoparticles, and the coating quality characteristics were compared with coating formulated with commercial anticorrosive and UV-aging agents. Formulations were prepared with 3 wt % commercial anticorrosive agent as reference material (RP), 3 wt % cerium oxide microparticles (CER1), 3 wt % and 1% cerium oxide nanoparticles (CER2 and CER3), respectively. The basket milling technique with zirconium balls was used for the preparations of coatings and characterizations were performed by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and contact angle measurements. Improvement in the anticorrosive properties was proven with electrochemical impedance spectroscopy (EIS) and accelerated salt spray tests based on ISO 4628 Evaluation of Degradation of Coatings. Furthermore, physical and mechanical tests were run according to standard test methods for coatings and reported. Results showed that cerium oxide particles provide anticorrosive, UV defender, and self-cleaning effects, besides excellent physical resistance to alkyd coatings. The impact of cerium oxide nanoparticles was found to be stronger than those of the microparticles.

The impact of cerium oxide nanoparticles on tomato (Solanum lycopersicum L.) and its implications for food safety

Metallomics ◽  
2012 ◽  
Vol 4 (10) ◽  
pp. 1105 ◽  
Author(s):  
Qiang Wang ◽  
Xingmao Ma ◽  
Wen Zhang ◽  
Haochun Pei ◽  
Yongsheng Chen
Keyword(s):  
Food Safety ◽  
Solanum Lycopersicum ◽  
Cerium Oxide ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Solanum Lycopersicum L ◽  
The Impact

scholarly journals Cerium Oxide Nanoparticles Affect Heavy Metals Uptake by Pea in a Divergent Way than Their Ionic and Bulk Counterparts

2019 ◽  
Vol 230 (10) ◽  
Author(s):  
Elżbieta Skiba ◽  
Wojciech M. Wolf
Keyword(s):  
Plant Growth ◽  
Cerium Oxide ◽  
Metal Uptake ◽  
Cerium Nitrate ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
The Impact ◽  
Heavy Metals Uptake ◽  
Level Analysis ◽  
Cerium Compounds

Abstract The impact of cerium oxide nanoparticles, bulk cerium oxide and ionic cerium nitrate on the plant development as well as the uptake and further translocation of Cu, Mn, Zn and Fe by sugar pea (Pisum sativum L.) was investigated. Plants were cultivated in the laboratory pot experiments using the modified Hoagland solutions supplemented with cerium compounds at the 200 mg L−1 Ce level. Analysis of variance proved that cerium oxide nanoparticles significantly decreased Cu, Mn, Zn and Fe concentrations in roots and above ground parts of the pea plants. The latter ions are presumably transported via symplastic pathways and may compete with nanoparticles for similar carriers. The lowest impact on the plant growth and the metal uptake was observed under the bulk CeO2 treatment. On the contrary, strongest interactions were observed for supplementation with ionic cerium nitrate. The highly beneficial effect of cerium oxide nanoparticles on the plant growth was not supported by this study. The latter conclusion is of particular relevance when environmental impact of cerium compounds on the waste management, municipal urban low emissions and food production is to be concerned.

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.

scholarly journals Recent insights into the impact, fate and transport of cerium oxide nanoparticles in the plant-soil continuum

2021 ◽  
Vol 221 ◽  
pp. 112403
Author(s):  
Ved Prakash ◽  
Jose Peralta-Videa ◽  
Durgesh Kumar Tripathi ◽  
Xingmao Ma ◽  
Shivesh Sharma
Keyword(s):  
Cerium Oxide ◽  
Fate And Transport ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Plant Soil ◽  
The Impact

Rational Synthesis Concept for Cerium Oxide Nanoparticles: On the Impact of Particle Size on the Oxygen Storage Capacity

2020 ◽  
Vol 124 (16) ◽  
pp. 8736-8748 ◽  
Author(s):  
Elifkübra Özkan ◽  
Pascal Cop ◽  
Felix Benfer ◽  
Alexander Hofmann ◽  
Martin Votsmeier ◽  
...  
Keyword(s):  
Particle Size ◽  
Cerium Oxide ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
The Impact

scholarly journals Toxicity of cerium oxide nanoparticles to the earthworm Eisenia fetida: subtle effects

2014 ◽  
Vol 11 (3) ◽  
pp. 268 ◽  
Author(s):  
Elma Lahive ◽  
Kerstin Jurkschat ◽  
Benjamin J. Shaw ◽  
Richard D. Handy ◽  
David J. Spurgeon ◽  
...  
Keyword(s):  
Toxic Effect ◽  
Cerium Oxide ◽  
Eisenia Fetida ◽  
Standard Test ◽  
The Body ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Histological Changes ◽  
Survival And Reproduction ◽  
Cerium Salt

Environmental context This study investigates the toxicity of cerium oxide nanoparticles to earthworms, key organisms in soil ecosystems. Cerium oxide did not affect survival or reproduction of the earthworms but did exert histological changes. We conclude that current soil guidelines, based simply on metal toxicity, appear to adequately protect against cerium exposure risk, at least for earthworms. Abstract The toxicity of cerium oxide (CeO2) nanoparticles (NPs) in soils is largely unknown. This study aimed to investigate the toxicity of three different CeO2 NPs to the earthworm, Eisenia fetida, for effects on survival (at day 28) and reproduction (at day 56), as well as bioaccumulation and histopathological effects. Eisenia fetida were exposed in standard Lufa 2.2 soil to three CeO2 NPs of different size ranges (5–80nm), one larger particle (300nm) and a cerium salt (ammonium cerium nitrate) over an exposure range from 41–10000mgCekg–1. Survival and reproduction were not affected by the four CeO2 particles, even at the highest exposure concentration tested. Alternatively, 10000mgCekg–1 cerium salt affected survival and reproduction; Median lethal concentration (LC50) and effective concentration (EC50) values were 317.8 and 294.6mgCekg–1. Despite a lack of toxic effect from the different forms of CeO2 particles, there was a dose-dependent increase in cerium in the organisms at all exposure concentrations, and for all material types. Earthworms exposed to CeO2 particles had higher concentrations of total cerium compared to those exposed to ionic cerium, but without exhibiting the same toxic effect. Histological observations in earthworms exposed to the particulate forms of CeO2 did, however, show cuticle loss from the body wall and some loss of gut epithelium integrity. The data suggest that that CeO2 NPs do not affect survival or reproduction in E. fetida over the standard test period. However, there were histological changes that could indicate possible deleterious effects over longer-term exposures.

scholarly journals Cerium Oxide Nanoparticles Protect against Oxidant Injury and Interfere with Oxidative Mediated Kinase Signaling in Human-Derived Hepatocytes

2019 ◽  
Vol 20 (23) ◽  
pp. 5959 ◽  
Author(s):  
Silvia Carvajal ◽  
Meritxell Perramón ◽  
Gregori Casals ◽  
Denise Oró ◽  
Jordi Ribera ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Cell Viability ◽  
Cerium Oxide ◽  
Antioxidant Properties ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Oxidant Injury ◽  
Ros Scavenging ◽  
Alcoholic Fatty Liver ◽  
The Impact

Cerium oxide nanoparticles (CeO2NPs) possess powerful antioxidant properties, thus emerging as a potential therapeutic tool in non-alcoholic fatty liver disease (NAFLD) progression, which is characterized by a high presence of reactive oxygen species (ROS). The aim of this study was to elucidate whether CeO2NPs can prevent or attenuate oxidant injury in the hepatic human cell line HepG2 and to investigate the mechanisms involved in this phenomenon. The effect of CeO2NPs on cell viability and ROS scavenging was determined, the differential expression of pro-inflammatory and oxidative stress-related genes was analyzed, and a proteomic analysis was performed to assess the impact of CeO2NPs on cell phosphorylation in human hepatic cells under oxidative stress conditions. CeO2NPs did not modify HepG2 cell viability in basal conditions but reduced H2O2- and lipopolysaccharide (LPS)-induced cell death and prevented H2O2-induced overexpression of MPO, PTGS1 and iNOS. Phosphoproteomic analysis showed that CeO2NPs reverted the H2O2-mediated increase in the phosphorylation of peptides related to cellular proliferation, stress response, and gene transcription regulation, and interfered with H2O2 effects on mTOR, MAPK/ERK, CK2A1 and PKACA signaling pathways. In conclusion, CeO2NPs protect HepG2 cells from cell-induced oxidative damage, reducing ROS generation and inflammatory gene expression as well as regulation of kinase-driven cell survival pathways.

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