Molecular nanoparticles of cerium dioxide: structure-directing effect of halide ions

2020 ◽  
Vol 56 (40) ◽  
pp. 5382-5385
Author(s):  
Bradley Russell-Webster ◽  
Khalil A. Abboud ◽  
George Christou
Keyword(s):  
Cerium Dioxide ◽  
Halide Ions ◽  
Directing Effect ◽  
Molecular Nanoparticles

The use of halide ions in the synthesis of Ce/O clusters diverts the reaction to two halide-containing products: Cl− gives a new Ce20 nuclearity with both a high 1 : 1 Ce3+ : Ce4+ ratio and a high percentage of (100) facet coverage, whereas F− gives a known Ce6 nuclearity.

Expansion of the Family of Molecular Nanoparticles of Cerium Dioxide and Their Catalytic Scavenging of Hydroxyl Radicals

2021 ◽  
Vol 60 (3) ◽  
pp. 1641-1653
Author(s):  
Kylie J. Mitchell ◽  
Justin L. Goodsell ◽  
Bradley Russell-Webster ◽  
Umar T. Twahir ◽  
Alexander Angerhofer ◽  
...  
Keyword(s):  
Hydroxyl Radicals ◽  
Cerium Dioxide ◽  
The Family ◽  
Molecular Nanoparticles

Truly Monodisperse ‘Molecular Nanoparticles’ of Cerium Dioxide of 2.4 nm dimensions: A {Ce100O167} Cluster

2021 ◽  
Author(s):  
George Christou ◽  
Bradley Russell-Webster ◽  
Javi Lopez-Nieto ◽  
Khalil A. Abboud
Keyword(s):  
Cerium Dioxide ◽  
Molecular Nanoparticles

ACUTE TOXICITY OF CERIUM DIOXIDE NANOPARTICLES

2019 ◽  
pp. 56-62
Author(s):  
N. V. Khodykina ◽  
L. P. Tochilkina ◽  
O. N. Novikova ◽  
M. S. Sroslov ◽  
A. Ya. Pocheptsov ◽  
...  
Keyword(s):  
Toxic Effect ◽  
Cerium Dioxide ◽  
Intraperitoneal Administration ◽  
Body Weight Loss ◽  
The Body ◽  
Prooxidant Effect ◽  
High Exposure ◽  
Abdominal Organs ◽  
Metabolic Imbalance ◽  
Hematological Changes

The resorptive effects of 0.01 M cerium nanodioxide sol upon single intraperitoneal administration to rats have been studied. The acute exposure to nanoparticles was found to have a dose-dependent general toxic effect on the body (weight loss, inflammatory changes in the abdominal organs, modification of individual behavior, hematological changes, metabolic imbalance), which develops on the background of POL activation. The prooxidant effect of cerium dioxide nanoparticles is demonstratively manifested at relatively high exposure levels (80–8 mg / kg). The threshold dose for the general toxic effect (Limch integr) is equal to 0.8 mg / kg.

Decomposition of hydrogen peroxide on cerium dioxide-nickel oxide two-component catalysts and the effect of ionizing radiation on them

1984 ◽  
Vol 49 (1) ◽  
pp. 14-24 ◽  
Author(s):  
Viliam Múčka
Keyword(s):  
Heat Treatment ◽  
Hydrogen Peroxide ◽  
Ionizing Radiation ◽  
Nickel Oxide ◽  
Cerium Dioxide ◽  
Catalytic Properties ◽  
Specific Activity ◽  
Ion Pairs ◽  
Composition Region ◽  
Two Component

Some physical and catalytic properties of cerium dioxide-nickel oxide two-component catalysts have been studied over the entire composition region, employing the decomposition of hydrogen peroxide in aqueous solution as a model catalytic process. The two oxides have been found to affect each other, particularly for NiO contents of 9.1 and 96.7 mol%; the mutual influencing, the nature of which in the conditions applied remains unaffected by heat treatment of the sample or by its exposition to ionizing radiation, is manifested by the nonmonotonic dependences of the oxidation power and of the specific activity of the catalysts on their composition. This can be interpreted in terms of the concept of bivalent catalytic centres, assuming that for nickel oxide the centres consist of Ni2+-Ni3+ ion pairs, for cerium dioxide they consist of Ce3+-Ce4+ ion pairs, and that in the region of the mutual influencing , Ni2+-Ce4+ ion pairs play a major role. Within the scope of this concept, the increase in the oxidation power of all the catalysts in question and a simultaneously decrease in the specific activity of the pure nickeloxide exposed to ionizing radiation can be explained in terms of the ionization effect.

Luminescent-optical properties of cerium dioxide nanoparticles annealed in a reducing atmosphere

2019 ◽  
Author(s):  
A. V. Myshkina ◽  
I. N. Bazhukova ◽  
V. A. Pustovarov ◽  
S. Yu. Sokovnin
Keyword(s):  
Optical Properties ◽  
Cerium Dioxide ◽  
Reducing Atmosphere

Structure-directing study of 1-methylimidazolium-based dication with tetramethylene as spacer length in the synthesis of microporous silicoaluminophosphates

2021 ◽  
Author(s):  
Thayara Kellen Tavares ◽  
Gabrielli Almeida ◽  
Yuri Variani ◽  
Katia Bernardo-Gusmão ◽  
Paloma Vinaches ◽  
...  
Keyword(s):  
Structure Directing Agent ◽  
Spacer Length ◽  
Organic Structure ◽  
Directing Effect

In this work we study the structure-directing effect of 1-methylimidazolium-based dications with four methylene units as spacer length (4BI), as Organic Structure-Directing Agent (OSDA) in the synthesis of silicoaluminophosphate (SAPO)...

Synthesis, structural and optical characteristics of vanadium doped cerium dioxide layers

Materialia ◽  
2021 ◽  
pp. 101143
Author(s):  
A. El-Habib ◽  
M. Addou ◽  
A. Aouni ◽  
M. Diani ◽  
J. Zimou ◽  
...  
Keyword(s):  
Cerium Dioxide ◽  
Optical Characteristics

Investigation of the effect of cerium dioxide nanoparticles on the radiosensitivity of various cell types

2020 ◽  
Author(s):  
M. V. Ulitko ◽  
A. S. Naumova ◽  
T. R. Sultanova ◽  
R. A. Vazirov ◽  
E. N. Agdantseva ◽  
...  
Keyword(s):  
Cerium Dioxide ◽  
Cell Types
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