Synthesis and characterization of magnetic mesoporous Fe3O4@mSiO2–DODGA nanoparticles for adsorption of 16 rare earth elements

Li, Jingrui; Gong, Aijun; Li, Fukai; Qiu, Lina; Zhang, Weiwei; Gao, Ge; Liu, Yu; Li, Jian‐Di

doi:10.1039/c8ra07762b

Cited by 38 publications

(4 citation statements)

References 46 publications

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“…Then, the lowest slope of two straight lines corresponds to the adsorption equilibrium at the third stage, manifesting that the remaining unoccupied active sites are regarded to be negligible. 38,39 Moreover, Table S2 reveals that the predicted Q e2 values of the PSO kinetic model are 42.55 for IIP-AM and 47.39 mg/g for IIP-MAA, which are closer to the real experimental data. In the case of the PFO kinetic model, the predicted Q e1 values of IIP-AM are higher than that of IIP-MAA, which is opposite to the real experimental results.…”

Section: ■ Introductionsupporting

confidence: 59%

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Enhanced Selective Adsorption of Lanthanum(III) by Dual-Site Polymeric Ion-Imprinted Nanoparticles from Aqueous Media

Zhang

Liu

Guo

et al. 2023

ACS Appl. Polym. Mater.

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Selective recognition and separation of rare-earth elements (REEs) is considered a real challenge for the RE industry. In this work, two dual-site ion-imprinted polymers (IIP-AM and IIP-MAA) were synthesized via a radical copolymerization method for the removal of La(III) from aqueous solutions. The structures of samples were characterized and confirmed with various kinds of techniques, including IR, X-ray diffraction, field emission scanning electron microscopy, Brunauer–Emmett–Teller, thermogravimetry analysis, and X-ray photoelectron spectroscopy (XPS). Adsorption studies reveal that the pseudo-second-order kinetic model and the Langmuir isotherm model were well-fitted with the adsorption of La(III), showing high adsorption capacities of 45.65 and 50.05 mg/g for IIP-AM and IIP-MAA, respectively, after 120 min at pH = 5.5 and 25 °C. Impressively, the fabricated IIPs possess remarkable selectivity between La(III) and other REEs, as well as excellent reusability after five successive adsorption–regeneration cycles with less than 9% reduction of capacities. The adsorption mechanism indicates that the surface complexation and electrostatic attraction contribute to the adsorption of La(III) based on the characterization analysis of XPS, elemental mapping, and energy-dispersive spectrometry, as well as density functional theory calculations. Accordingly, these samples with tailored ion-imprinted cavities and abundant active O sites entirely exhibit the potentials for the selective recovery of REEs from aqueous solutions.

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Section: ■ Introductionsupporting

confidence: 59%

“…At the second stage, ID of La(III) plays the dominate role. Then, the lowest slope of two straight lines corresponds to the adsorption equilibrium at the third stage, manifesting that the remaining unoccupied active sites are regarded to be negligible. , …”

Section: Resultsmentioning

confidence: 99%

Enhanced Selective Adsorption of Lanthanum(III) by Dual-Site Polymeric Ion-Imprinted Nanoparticles from Aqueous Media

Zhang

Liu

Guo

et al. 2023

ACS Appl. Polym. Mater.

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“…The use of core-shell magnetic mesoporous silica nanoparticles (MMSNs) has grown a lot over the last decade. Many different applications have been described, such as their use as theranostic agents for magnetic resonance imaging and drug delivery, for cancer applications [1][2][3], sensor agents for sensitive detections [4,5], or extracting agents for the removal of heavy metal ions [6][7][8], rare earth elements [9] or actinides [10]. Another recent study highlights the potential ability of MMSNs to remove iron from biological media [11].…”

Section: Introductionmentioning

confidence: 99%

Upscale Synthesis of Magnetic Mesoporous Silica Nanoparticles and Application to Metal Ion Separation: Nanosafety Evaluation

Ménard,

Ali,

Vardanyan

et al. 2023

Nanomaterials

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The synthesis of core–shell magnetic mesoporous nanoparticles (MMSNs) through a phase transfer process is usually performed at the 100–250 mg scale. At the gram scale, nanoparticles without cores or with multicore systems are observed. Iron oxide core nanoparticles (IO) were synthesized through a thermal decomposition procedure of α-FeO(OH) in oleic acid. A phase transfer from chloroform to water was then performed in order to wrap the IO nanoparticles with a mesoporous silica shell through the sol–gel procedure. MMSNs were then functionalized with DTPA (diethylenetriaminepentacetic acid) and used for the separation of metal ions. Their toxicity was evaluated. The phase transfer procedure was crucial to obtaining MMSNs on a large scale. Three synthesis parameters were rigorously controlled: temperature, time and glassware. The homogeneous dispersion of MMSNs on the gram scale was successfully obtained. After functionalization with DTPA, the MMSN-DTPAs were shown to have a strong affinity for Ni ions. Furthermore, toxicity was evaluated in cells, zebrafish and seahorse cell metabolic assays, and the nanoparticles were found to be nontoxic. We developed a method of preparing MMSNs at the gram scale. After functionalization with DTPA, the nanoparticles were efficient in metal ion removal and separation; furthermore, no toxicity was noticed up to 125 µg mL−1 in zebrafish.

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“…The surface of mesoporous Fe 3 O 4 particles was modified with a diglycolamide ligand. 31 Liu et al worked with magnetic bio-adsorbent Fe 3 O 4 -C 18 -chitosan-DETA (FCCD) composite to test the adsorption capacity of Dy 3+ , Nd 3+ , and Er 3+ . 32 Miraoui et al studied the sorption capacities of Nd 3+ on magnetic nanoparticles grafted by poly(aminoethylene N-methyl 1-formic acid, 1-phosphonic acid) (PAEMFP).…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Capability of Magnetic Nanoparticles to Recover Neodymium Ions from Aqueous Solution

Ambrož

Ban

Luxbacher

2022

ACSi

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Magnetic nanoparticles (MNPs) have received increasing attention for various applications due to their fast synthesis, versatile functionalization, and recyclability by the application of a magnetic field. The high surface-to-volume ratio of MNP dispersions has suggested their use as an adsorbent for the removal of heavy metal ions. We investigated the applicability of MNPs composed of a maghemite core surrounded by a silica shell functionalized with aminopropylsilane, γ-Fe2O3-NH4OH@SiO2(APTMS), for the removal of neodymium ions (Nd3+) from aqueous solution. The MNPs were characterized for their size, composition, surface functionality and charge. Despite of the promising properties of MNPs, their removal from the aqueous dispersion with an external magnet was not sufficient to reliably quantify the adsorption of Nd3+ by UV-Vis spectroscopy.

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Synthesis and characterization of magnetic mesoporous Fe₃O₄@mSiO₂–DODGA nanoparticles for adsorption of 16 rare earth elements

Abstract: The high selectivity magnetic mesoporous Fe3O4@mSiO2–DODGA nanomaterials were prepared for adsorption of 16 rare earth elements.

Cited by 38 publications

References 46 publications

Enhanced Selective Adsorption of Lanthanum(III) by Dual-Site Polymeric Ion-Imprinted Nanoparticles from Aqueous Media

Enhanced Selective Adsorption of Lanthanum(III) by Dual-Site Polymeric Ion-Imprinted Nanoparticles from Aqueous Media

Upscale Synthesis of Magnetic Mesoporous Silica Nanoparticles and Application to Metal Ion Separation: Nanosafety Evaluation

Assessment of the Capability of Magnetic Nanoparticles to Recover Neodymium Ions from Aqueous Solution

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