High performance magnetically recoverable Fe3O4 nanocatalysts: fast microwave synthesis and photo-fenton catalysis under visible-light

Zanchettin, Gabriela; Falk, Gilberto da Silva; González, Sergio Yesid Gómez; Hotza, Dachamir

doi:10.1016/j.cep.2021.108438

Cited by 29 publications

(15 citation statements)

References 40 publications

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“…According to the literature, the microwave-assisted solvothermal synthesis of magnetite particles could be divided into two stages. The first is called the nucleation of primary crystals and the second is called the nanoparticles aggregation [ 27 , 61 ]. In the synthesis mixture, sodium acetate acts as a weak base, helping the EG to reduce iron ions, and, in the presence of the trace amount of water, it can be hydrolyzed and release OH − ions.…”

Section: Resultsmentioning

confidence: 99%

“…This route could be further divided according to the synthesis procedure: hydrothermal [ 16 ], solvothermal [ 12 , 17 ], thermal decomposition [ 18 ], microwave-assisted [ 19 , 20 ], sol-gel [ 21 , 22 ], coprecipitation [ 23 ] and others [ 4 ]. In addition to this, the combination of two methods could be used: microwave-assisted solvothermal [ 24 , 25 , 26 , 27 , 28 , 29 ] or hydrothermal [ 20 , 30 ] methods or microwave assisted thermal decomposition methods [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is an energy-saving method as well. The microwave-assisted solvothermal method provides the possibility to reduce the synthesis time efficiently [ 26 , 27 ]. In addition, the modification of nanoparticles by coating with 3-(trimethoxysilyl)-1-propanethiol (TMSPT) and the subsequent modification by coating with 2-amino-5-mercapto-1,3,4-thiadiazole (AMP) to increase the stability of the nanoparticles are possible through this technique [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the whole process, including the synthesis of the nanoparticles, the coating with TMSPT and the modification with AMP, was accomplished during a short period of time (30 min) [ 26 ]. Furthermore, the semicrystalline Fe 3 O 4 nanoparticles with an average diameter of 15 nm generated by the microwave-assisted solvothermal process were demonstrated to be active in the photocatalytic degradation of azo dye methyl orange and tetracycline under visible light radiation [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

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Microwave-Assisted Solvothermal Synthesis of Nanocrystallite-Derived Magnetite Spheres

et al. 2022

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The synthesis of magnetic particles triggers the interest of many scientists due to their relevant properties and wide range of applications in the catalysis, nanomedicine, biosensing and magnetic separation fields. A fast synthesis of iron oxide magnetic particles using an eco-friendly and facile microwave-assisted solvothermal method is presented in this study. Submicron Fe3O4 spheres were prepared using FeCl3 as an iron source, ethylene glycol as a solvent and reductor and sodium acetate as a precipitating and nucleating agent. The influence of the presence of polyethylene glycol as an additional reductor and heat absorbent was also evaluated. We reduce the synthesis time to 1 min by increasing the reaction temperature using the microwave-assisted solvothermal synthesis method under pressure or by adding PEG at lower temperatures. The obtained magnetite spheres are 200–300 nm in size and are composed of 10–30 nm sized crystallites. The synthesized particles were investigated using the XRD, TGA, pulsed-field magnetometry, Raman and FTIR methods. It was determined that adding PEG results in spheres with mixed magnetite and maghemite compositions, and the synthesis time increases the size of the crystallites. The presented results provide insights into the microwave-assisted solvothermal synthesis method and ensure a fast route to obtaining spherical magnetic particles composed of different sized nanocrystallites.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microwave-Assisted Solvothermal Synthesis of Nanocrystallite-Derived Magnetite Spheres

et al. 2022

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“…The microwave solvothermal approach reported by Zanchettin, G. et al (2021) to manufacture Fe 3 O 4 nanoparticles was efficient, yielding magnetite nanoparticles in a short reaction time with only two reactants and one iron precursor. Magnetic nanoparticles with low shape and size variation, high yield, and crystallinity were created.…”

Section: Photodegradation Performancementioning

confidence: 99%

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

et al. 2021

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The rapid urbanization and industrialization is causing worldwide water pollution, calling for advanced cleaning methods. For instance, pollutant adsorption on magnetic oxides is efficient and very practical due to the easy separation from solutions by an magnetic field. Here we review the synthesis and performance of magnetic oxides such as iron oxides, spinel ferrites, and perovskite oxides for water remediation. We present structural, optical, and magnetic properties. Magnetic oxides are also promising photocatalysts for the degradation of organic pollutants. Antimicrobial activities and adsorption of heavy metals and radionucleides are also discussed.

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Green Nanocellulose/PEI‐Grafted Magnetic Nanoparticles for Effective Removal of Heavy Metal Ions

Sathasivam,

Kang Brian,

Andersen

et al. 2023

Chemistry An Asian Journal

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In response to the pressing issue of water pollution caused by heavy metal ions, there is a growing demand for green adsorbents that can effectively remove these contaminants while being easy to separate and regenerate. A novel magnetic composite was synthesized by bonding amino‐functionalized Fe3O4−SiO2 magnetic particles (MNP‐NH2) to polyethyleneimine (PEI)‐grafted cellulose nanofibers (CNF). The modification of CNF with PEI through a peptidic coupling reaction resulted in the uniform dispersion and strong attachment of MNP‐NH2 particles (286.7 nm) onto the PEI‐CNF surface. This composite exhibited exceptional adsorption capabilities for heavy metals, achieving 16.73 mg/g for Pb, 16.12 mg/g for Cu, and 12.53 mg/g for Co. These remarkable adsorption capacities are attributed to the complex interactions between the metal ions and the amino, carboxyl, and hydroxyl groups on the surface of PEI‐CNF‐MNP. The introduction of PEI significantly enhanced the adsorption capacities, and the adsorption sequence (Pb(II)>Cu(II)>Co(II)) can be explained by differences in ionic radius and surface complexation strength. Langmuir isotherm and pseudo‐second‐order kinetic models described the adsorption process, while Na2EDTA was proved effective for desorption with high recovery rates. This magnetic composite holds promise for treating heavy metal‐contaminated wastewater due to its impressive performance.

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High performance magnetically recoverable Fe3O4 nanocatalysts: fast microwave synthesis and photo-fenton catalysis under visible-light

Cited by 29 publications

References 40 publications

Microwave-Assisted Solvothermal Synthesis of Nanocrystallite-Derived Magnetite Spheres

Microwave-Assisted Solvothermal Synthesis of Nanocrystallite-Derived Magnetite Spheres

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

Green Nanocellulose/PEI‐Grafted Magnetic Nanoparticles for Effective Removal of Heavy Metal Ions

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