Synthesis, characterization and solubility of mixed zirconium-cerium molybdate precipitates

Jakab-Costenoble, Sandrine; Rumaux, Ingrid; Odore, Elodie; Picart, Sébastien

doi:10.1080/00223131.2018.1492468

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…01-081-1155, indicating the monoclinic phase of cerium molybdate with the P21/c space group. The monoclinic phase of synthesized cerium molybdate was found to be in agreement with the studies reported by Brazdil et al, Jakab-Costenoble et al, and Sena et al [31][32][33]. However, two low-intensity peaks that appeared at 48.01° and 56.75° due to the tetragonal phase were indexed to the (220) and (303) planes, respectively [20].…”

Section: Xrd Analysissupporting

confidence: 89%

Sb-Doped Cerium Molybdate: An Emerging Material as Dielectric and Photocatalyst for the Removal of Diclofenac Potassium from Aqueous Media

Javaid,

Imran,

Kanwal

et al. 2023

Molecules

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This work reports the influence of antimony substitution in a cerium molybdate lattice for improved dielectric and photocatalytic properties. For this purpose, a series of Ce2−xSbx(MoO4)3 (x = 0.00, 0.01, 0.03, 0.05, 0.07, and 0.09) were synthesized through a co-precipitation route. The as-synthesized materials were characterized for their optical properties, functional groups, chemical oxidation states, structural phases, surface properties, and dielectric characteristics using UV–Vis spectroscopy (UV–Vis), Fourier transform infrared (FTIR) and Raman spectroscopies, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analysis, and impedance spectroscopy, respectively. UV–Vis study showed a prominent red shift of absorption maxima and a continuous decrease in band gap (3.35 eV to 2.79 eV) by increasing the dopant concentration. The presence of Ce–O and Mo–O–Mo bonds, detected via FTIR and Raman spectroscopies, are confirmed, indicating the successful synthesis of the desired material. The monoclinic phase was dominant in all materials, and the crystallite size was decreased from 40.29 nm to 29.09 nm by increasing the Sb content. A significant increase in the dielectric constant (ε′ = 2.856 × 108, 20 Hz) and a decrease in the loss tan (tanδ = 1.647, 20 Hz) were exhibited as functions of the increasing Sb concentration. Furthermore, the photocatalytic efficiency of pristine cerium molybdate was also increased by 1.24 times against diclofenac potassium by incorporating Sb (x = 0.09) in the cerium molybdate. The photocatalytic efficiency of 85.8% was achieved within 180 min of UV light exposure at optimized conditions. The photocatalytic reaction followed pseudo-first-order kinetics with an apparent rate constant of 0.0105 min−1, and the photocatalyst was recyclable with good photocatalytic activity even after five successive runs. Overall, the as-synthesized Sb-doped cerium molybdate material has proven to be a promising candidate for charge storage devices and a sustainable photocatalyst for wastewater treatment.

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Section: Xrd Analysissupporting

confidence: 89%

Sb-Doped Cerium Molybdate: An Emerging Material as Dielectric and Photocatalyst for the Removal of Diclofenac Potassium from Aqueous Media

Javaid,

Imran,

Kanwal

et al. 2023

Molecules

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“…The raffinate solution of the PUREX process contains the slight residual uranium and plutonium, minor actinides, and long-lived fission products, concentrating more than 95 % of the radioactivity in spent nuclear fuel [5][6][7][8][9]. The raffinate solution is called as high-level liquid waste (HLLW) [10,11]. In general, solid formation in liquid solution as HLLW occurs when the ionic concentration is increased beyond the solubility or the undissolved material is formed by a chemical reaction.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, zirconium molybdate hydrate (Zr(OH) 2 Mo 2 O 7 (H 2 O) 2 , ZMH), seems to be preferentially formed under solution conditions normally encountered in process operations. This reaction between the fission products molybdenum and zirconium happens in hot nitric acid solution . Kubota and Fukase found that tellurium coprecipitates with ZMH.…”

Section: Introductionmentioning

confidence: 99%

Effect of Anti‐Encrustation Additives on Zirconium Molybdate Hydrate

et al. 2020

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Anti-encrustation additives were mainly investigated in nitric acid solution with zirconium (Zr), molybdenum (Mo), and tellurium (Te) to prevent the encrustation of zirconium molybdate hydrate (ZMH). The ZMH generated by reaction crystallization of Mo and Zr as main fission products has a high adhesion property in spent nuclear fuel reprocessing. In addition, it is reported that Te, which is also one of the fission products, precipitates together with ZMH. Encrustation of precipitates containing Te was effectively prevented by adding molybdenum trioxide (MoO 3 ) crystals as an anti-encrustation reagent. The encrustation amount was found to be larger than that under the condition of only Zr and Mo without Te. Consequently, it was suggested that the high adhesion property of Te affected the encrustation amount of ZMH.

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Active and stable ceria-zirconia supported molybdenum oxide catalysts for cyclooctene epoxidation: Effect of the preparation procedure

et al. 2020

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Synthesis, characterization and solubility of mixed zirconium-cerium molybdate precipitates

Cited by 5 publications

References 25 publications

Sb-Doped Cerium Molybdate: An Emerging Material as Dielectric and Photocatalyst for the Removal of Diclofenac Potassium from Aqueous Media

Sb-Doped Cerium Molybdate: An Emerging Material as Dielectric and Photocatalyst for the Removal of Diclofenac Potassium from Aqueous Media

Effect of Anti‐Encrustation Additives on Zirconium Molybdate Hydrate

Active and stable ceria-zirconia supported molybdenum oxide catalysts for cyclooctene epoxidation: Effect of the preparation procedure

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