Speciation on the reaction of uranium and zirconium oxides treated under oxidizing and reducing atmospheres

Metal Oxide Nanostructures Chemistry

10.1093/oso/9780190928117.001.0001 ◽

2019 ◽

Author(s):

Jean-Pierre Jolivet

Keyword(s):

Particle Growth ◽

General View ◽

Ceramic Powders ◽

Metal Hydroxides ◽

Synthesis Conditions ◽

Zirconium Oxides ◽

Oxide Nanostructures ◽

Metal Oxide Nanostructures ◽

Ordered Aggregation ◽

Size And Morphology

This much-anticipated new edition of Jolivet's work builds on the edition published in 2000. It is entirely updated, restructured and increased in content. The book focuses on the formation by techniques of green chemistry of oxide nanoparticles having a technological interest. Jolivet introduces the most recent concepts and modelings such as dynamics of particle growth, ordered aggregation, ionic and electronic interfacial transfers. A general view of the metal hydroxides, oxy-hydroxides and oxides through the periodic table is given, highlighting the influence of the synthesis conditions on crystalline structure, size and morphology of nanoparticles. The formation of aluminum, iron, titanium, manganese and zirconium oxides are specifically studied. These nanomaterials have a special interest in many technological fields such as ceramic powders, catalysis and photocatalysis, colored pigments, polymers, cosmetics and also in some biological or environmental phenomena.

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Vibrational Spectroscopic and X-Ray Diffraction Studies of Cerium Zirconium Oxides with Ce/Zr Composition Ratio=1 Prepared by Reduction and Successive Oxidation of t′-(Ce0.5Zr0.5)O2 Phase

Journal of Solid State Chemistry ◽

10.1006/jssc.1999.8420 ◽

1999 ◽

Vol 147 (2) ◽

pp. 573-583 ◽

Cited By ~ 85

Author(s):

Takahisa Omata ◽

Haruo Kishimoto ◽

Shinya Otsuka-Yao-Matsuo ◽

Norikazu Ohtori ◽

Norimasa Umesaki

Keyword(s):

X Ray Diffraction ◽

X Ray ◽

Composition Ratio ◽

Zirconium Oxides

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Ion Beam Reactive Sputter-Deposition of Silicon and Zirconium Oxides.

MRS Proceedings ◽

10.1557/proc-396-563 ◽

1995 ◽

Vol 396 ◽

Author(s):

S.D. Pringle ◽

R. Valizadeh ◽

J.S. Colligon ◽

C.A. Faunce ◽

H. Kheyrandish

Keyword(s):

Partial Pressure ◽

Ion Beam ◽

Partial Pressure Of Oxygen ◽

Cross Sectional ◽

Silica Films ◽

Zirconium Oxides ◽

Reactive Sputter Deposition ◽

Silicon Carbon ◽

Argon Ion ◽

Zirconia Films

AbstractOxides of silicon and zirconium have been deposited onto silicon, carbon and aluminium substrates by reactive sputtering using a 1 keV argon ion beam and a controlled partial pressure of oxygen. Using RBS, film composition was determined for a given partial pressure of oxygen and different Si or Zr deposition rates. There is evidence of retained argon in the film which is primarily due to argon ions reflected from the sputtered target. Cross-sectional TEM was used to examine the film microstructure and morphology. Both silica films and sub-stoichiometric zirconia films were found to be amorphous,whereas stoichiometric zirconia films were found to be polycrystalline with grain sizes in the range 10-20nm. A model has been developed to predict the composition of deposited films.

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Sustainable and homogeneous arc ablation behaviors of zirconium cathodes improved by in-situ formation of zirconium oxides

Journal of Physics D Applied Physics ◽

10.1088/1361-6463/abed08 ◽

2021 ◽

Author(s):

Weimian Guan ◽

Hao Lv ◽

Jie Yuan ◽

Dejiang Chen ◽

Tao Zhu ◽

...

Keyword(s):

Zirconium Oxides ◽

In Situ Formation

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Oxide-Clay Mineral as Photoactive Material for Dye Discoloration

Minerals ◽

10.3390/min10020132 ◽

2020 ◽

Vol 10 (2) ◽

pp. 132

Author(s):

Maicon O. Miranda ◽

Bartolomeu Cruz Viana ◽

Luzia Maria Honório ◽

Pollyana Trigueiro ◽

Maria Gardênnia Fonseca ◽

...

Keyword(s):

Electron Microscopy ◽

Photocatalytic Activity ◽

Clay Mineral ◽

Uv Light ◽

High Photocatalytic Activity ◽

X Ray Diffraction ◽

Sem Images ◽

Zirconium Oxides ◽

Transmission Electron ◽

Palygorskite Clay

Titanium and zirconium oxides (TiO2 and ZrO2, respectively) were obtained from alkoxides hydrolyses, and then deposited into palygorskite clay mineral (Pal) to obtain new materials for photocatalytic applications. The obtained materials were characterized by structural, morphological, and textural techniques. X-ray diffraction (XRD) results confirmed the characteristic peaks of oxides and clay transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images of the modified palygorskite with both oxides showed that the clay was successfully modified by the proposed method. The increase in the specific surface area of the clay occurred when TiO2 and ZrO2 were deposited on the surface. The photocatalytic activity of these materials was investigated using the Remazol Blue anion dye under UV light. The evaluated systems presented high photocatalytic activity, reaching approximately 98% of dye discoloration under light. Thus, TiO2–Pal and ZrO2–TiO2–Pal are promising clay mineral-based photocatalysts.

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