Photocatalytic reduction of uranium(VI) by magnetic ZnFe2O4 under visible light

Liang, Pengliang; Yuan, Liyong; Deng, Hao; Wang, Xucong; Wang, Lin; Li, Zi‐Jie; Luo, Shi-Zhong; Shi, Wenjing

doi:10.1016/j.apcatb.2020.118688

Cited by 210 publications

(44 citation statements)

References 62 publications

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“…Different cation distribution will result in different magnetic properties due to the different superexchange interaction of A-O-B and B-O-B [9]. Spinel ZnFe 2 O 4 (ZFO) ferrite is widely studied as a kind of potential catalytic or anodic material [10][11][12][13]. Theoretically, ZFO is a typical normal spinel ferrite with a cation distribution in lattice sites as the following:…”

Section: Introductionmentioning

confidence: 99%

A comparative study of spinel ZnFe2O4 ferrites obtained via a hydrothermal and a ceramic route: Structural and magnetic properties

Zhu

Cao

et al. 2021

Ceramics International

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The spinel ZnFe 2 O 4 specimens were obtained via a hydrothermal and a ceramic method, respectively, and their structural and magnetic properties were comparatively studied. It was found that all the specimens exhibited a single-phase and mixed spinel structure. The magnetism of specimens synthesized via the hydrothermal method is obviously greater than that of specimen prepared via the ceramic method. This can be ascribed to the occupancy of Fe ions resulted from the loss of Zn during the hydrothermal process.

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Section: Introductionmentioning

confidence: 99%

A comparative study of spinel ZnFe2O4 ferrites obtained via a hydrothermal and a ceramic route: Structural and magnetic properties

Zhu

Cao

et al. 2021

Ceramics International

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“…More recently, a photocatalytic reaction revealed great potential for the sorption of uranyl ions from aqueous solutions (Liang et al, 2020). A magnetic support (ZnFe 2 O 4 ) was developed, for converting U(VI) into U(IV) under visible-light irradiation.…”

Section: Introductionmentioning

confidence: 99%

A new route for manufacturing poly(aminophosphonic)-functionalized poly(glycidyl methacrylate)-magnetic nanocomposite - Application to uranium sorption from ore leachate

Galhoum

Eisa

Elsayed

et al. 2020

Environmental Pollution

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A high-energy ball milling of magnetite nanoparticles with amino-phosphonic functionalized poly(glycidyl methacrylate) polymer is used for manufacturing a highly efficient magnetic sorbent for U(VI) sorption from aqueous solutions. The Uranyl ions were adsorbed through the binding with amine and phosphonic groups as confirmed by Fourier Transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses. The maximum sorption capacity (up to 270 mg U g À1) occurred at pH ¼ 3e4; Langmuir isotherm well describes the sorption process. Small-size particles allow achieving fast uptake (within z90 min of contact); and the kinetic profiles are modeled by the pseudo-second order rate equation. Uranium is successfully desorbed from loaded sorbent using 0.25 M NaHCO 3 solution: Sorbent can be recycled with minimal decrease in sorption and desorption efficiency for at least 6 cycles. The sorbent is efficiently used for U(VI) recovery from the acidic leachates of U-bearing ores (after precipitation pre-treatment). Sorption capacity approaches 190 mg U g À1 despite the presence of high concentrations of Fe and Si: the sorbent has a marked preference for U(VI) (confirmed by distribution ratios and selectivity coefficients).

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“…Figure 3 showed the IR spectrum of ZnFe2O4@dimethylglyoxime hybrid catalysts in the range of 400-4400 cm −1 . The absorption at 415 cm −1 is related to the stretching vibration of Zn-O, and the appearing absorption in the range of 520-550 cm −1 is related to the stretching vibration of Fe-O 12 . The absorption bands at 1122 and 1050 cm −1 is attributed to symmetrical and asymmetrical stretching vibration of N-O bond, respectively.…”

Section: Characterization Of Catalystmentioning

confidence: 98%

ZnFe2O4@dimethylglyoxime: Preparation and Catalyst Application in the Synthesis of 2-Amino-tetrahydro-4H-chromene-3-carbonitrile Derivatives

Dogari

Hassanzadeh‐Afruzi

Maleki

2020

The 24th International Electronic Conference on Synthetic Organic Chemistry

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Hybrid materials constructed from two or more constituents provide new features and distinctive application which is not found in the single-part material. Spinel ferrites with general formula of AB2O4, where A and B represent a divalent metal ion such as Zn(II), Ni(II), Cu(II) and Fe(III) ions, appeared as efficient catalysts for the synthesis of organic compound. These magnetic nanoparticles have both the Lewis acid and the Lewis base sites in their structure. In present study, the ZnFe2O4 was prepared and modified with dimethylglyoxime to obtain magnetic ZnFe2O4@dimethylglyoxime hybrid catalyst. Dimethylglyoxime is a dibasic acid substance which has been used as a chelating agent for divalent metal ions due to containing two nitrogen atoms and hydroxyl groups. Surface modification of zinc ferrite with this dibasic acid substance produced bifunctional hybrid catalyst with increased catalytic active sites. In next step, prepared catalyst was applied in the synthesis of 2-amino-tetrahydro-4H-chromene-3-carbonitrile derivatives by condensation of, aromatic aldehydes, malononitrile and dimedone in ethanol at room temperature. The present procedure offers some advantages such as simple procedure, mild reaction condition, short reaction times and retrievable catalyst.

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Photocatalytic reduction of uranium(VI) by magnetic ZnFe2O4 under visible light

Cited by 210 publications

References 62 publications

A comparative study of spinel ZnFe2O4 ferrites obtained via a hydrothermal and a ceramic route: Structural and magnetic properties

A comparative study of spinel ZnFe2O4 ferrites obtained via a hydrothermal and a ceramic route: Structural and magnetic properties

A new route for manufacturing poly(aminophosphonic)-functionalized poly(glycidyl methacrylate)-magnetic nanocomposite - Application to uranium sorption from ore leachate

ZnFe2O4@dimethylglyoxime: Preparation and Catalyst Application in the Synthesis of 2-Amino-tetrahydro-4H-chromene-3-carbonitrile Derivatives

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