نتایج جستجو برای: cerium oxide nanocrystals

تعداد نتایج: 188099  

2004
Zheng Wang Mann Sakbodin Scott West Maria Flytzani-Stephanopoulos

Hot reformate gas produced by reforming of heavy fuels, such as JP-8, must be desulfurized prior to its use in a solid oxide fuel cell (SOFC). This requires development of sorbent materials with high sulfur absorption efficiency and capacity at the SOFC operating temperature (650-800 C) to avoid heat exchanger penalties. Sorbent performance stability in cyclic operation of sulfidation and regen...

Journal: :Journal of the Ceramic Association, Japan 1966

ژورنال: مواد پرانرژی 2015

Mixed spinel nanocrystals have captured the attention of scientist in the field for their catalytic activity in decomposition of hydrogen peroxide. In this study nanocatalysts MnFe2O4, Co3O4, Pb3O4, Co0.5Zn0.5Fe2O4 and Co0.5Mn0.5Fe2O4 were synthesized by co-precipitation method. The synthetic samples were characterized by XRD patterns, SEM images and IR spectroscopy. The size of the nanoparticl...

Journal: :Nanotechnology reviews 2022

Abstract Cerium oxide nanoparticles have unique catalytic and oxygen storage capacity properties. In this work, the morphology size of cerium were experimentally theoretically investigated. For synthesis nanoparticles, laser ablation method was used. The analysis morphological characteristics performed using transmission electron microscopy. Using molecular dynamics, we reveal limiting dimensio...

2007
Weihua Guan Shibing Long Ming Liu Zhigang Li Yuan Hu Qi Liu

Metal–oxide–semiconductor capacitor structure with metal nanocrystals embedded in the gate oxide for the application of nonvolatile memory (NVM) is fabricated. Optimal process parameters are investigated and Au nanocrystals are adopted in this paper. High-frequency capacitance versus voltage (C–V ) and conductance versus voltage (G–V ) measurements demonstrate the memory effect of the structure...

Journal: :The Science of the total environment 2015
Anita Jemec Petar Djinović Ilja Gasan Osojnik Crnivec Albin Pintar

The effect of nanomaterials on biota under realistic environmental conditions is an important question. However, there is still a lack of knowledge on how different illumination conditions alter the toxicity of some photocatalytic nanomaterials. We have investigated how environmentally relevant UV-A exposure (intensity 8.50 ± 0.61 W/m(2), exposure dose 9.0J/cm(2)) affected the toxicity of ceriu...

Journal: :Chemical communications 2007
Hyon Bin Na In Su Lee Heonjin Seo Yong Il Park Jung Hee Lee Sang-Wook Kim Taeghwan Hyeon

We report the simple synthesis of poly(ethylene glycol)(PEG)-derivatized phosphine oxide ligands for water-dispersible metal oxide nanocrystals.

Journal: :Dalton transactions 2014
Mohammad Mahdi Najafpour Mahnaz Abasi Tatsuya Tomo Suleyman I Allakhverdiev

For the first time, we considered Mn oxide/C60 composites as water-oxidizing catalysts. The composites were synthesized by easy and simple procedures, and characterized by some methods. The water-oxidizing activities of these composites were also measured in the presence of cerium(iv) ammonium nitrate. We found that the nanolayered Mn oxide/C60 composites show promising activity toward water ox...

2015
Lavinia Fiorani Maurizio Passacantando Sandro Santucci Stefano Di Marco Silvia Bisti Rita Maccarone Thomas Langmann

The first target of any therapy for retinal neurodegeneration is to slow down the progression of the disease and to maintain visual function. Cerium oxide or ceria nanoparticles reduce oxidative stress, which is known to play a pivotal role in neurodegeneration. Our aim was to investigate whether cerium oxide nanoparticles were able to mitigate neurodegeneration including microglial activation ...

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