Calcination effect on structural, morphological and magnetic properties of nano-sized CoFe2O4 developed by a simple co-precipitation technique

Basak, Munmun; Rahman, Lutfor; Ahmed, Md. Farid; Biswas, Bristy; Sharmin, Nahid

doi:10.1016/j.matchemphys.2021.124442

Cited by 49 publications

(14 citation statements)

References 67 publications

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“…Figure 2 displays the FTIR spectra of UiO-66, CoFe 2 O 4, and CoFe 2 O 4 @UiO-66 composite. All samples showed a broad band at 3,200–3,500 cm −1 related to the O–H stretching vibration of absorbed water molecules ( Ding et al, 2017 ; Basak et al, 2021 ). For UiO-66, typical bands can be identified at 1,585 and 1,396 cm −1 , corresponding to O–C–O asymmetric and symmetric vibrations of the -COOH group of the BDC ligand, respectively ( Liu et al, 2018 ).…”

Section: Resultsmentioning

confidence: 99%

In-situ construction of Zr-based metal-organic framework core-shell heterostructure for photocatalytic degradation of organic pollutants

et al. 2023

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Photocatalysis is an eco-friendly promising approach to the degradation of textile dyes. The majority of reported studies involved remediation of dyes with an initial concentration ≤50 mg/L, which was away from the existing values in textile wastewater. Herein, a simple solvothermal route was utilized to synthesize CoFe2O4@UiO-66 core-shell heterojunction photocatalyst for the first time. The photocatalytic performance of the as-synthesized catalysts was assessed through the photodegradation of methylene blue (MB) and methyl orange (MO) dyes at an initial concentration (100 mg/L). Under simulated solar irradiation, improved photocatalytic performance was accomplished by as-obtained CoFe2O4@UiO-66 heterojunction compared to bare UiO-66 and CoFe2O4. The overall removal efficiency of dyes (100 mg/L) over CoFe2O4@UiO-66 (50 mg/L) reached >60% within 180 min. The optical and photoelectrochemical measurements showed an enhanced visible light absorption capacity as well as effective interfacial charge separation and transfer over CoFe2O4@UiO-66, emphasizing the successful construction of heterojunction. The degradation mechanism was further explored, which revealed the contribution of holes (h+), superoxide (•O2−), and hydroxyl (•OH) radicals in the degradation process, however, h+ were the predominant reactive species. This work might open up new insights for designing MOF-based core-shell heterostructured photocatalysts for the remediation of industrial organic pollutants.

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Section: Resultsmentioning

confidence: 99%

In-situ construction of Zr-based metal-organic framework core-shell heterostructure for photocatalytic degradation of organic pollutants

et al. 2023

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“…There are various published methods to fabricate MNPs including sol–gel (1–3), microemulsion (4,5), thermal decomposition (6–8), and coprecipitation (9–13). In this work, we selected coprecipitation and reduction–precipitation, which allowed the synthesis in one pot under low temperatures and using a nontoxic solvent, water.…”

Section: Resultsmentioning

confidence: 99%

“…Lignin has been employed in nanocomposites and proved to increase the biodegradability and biocompatibility of nanostructures (7,8). Lignin has a variety of structures depending on the biomass source and pulping process, but in general, they are formed by a complex polyaromatic structure (9). Lignin capped nanomaterials, in special AgNPs, have shown controlled ion release, reducing toxicity toward human cells, while keeping effective antibacterial activities (7,10).…”

Section: Introductionmentioning

confidence: 99%

Exploring the Antibacterial Properties of Lignin‐coated Magnetic Nanoparticles Synthesized in a One‐pot Process^†

Silva

Scaiano

2022

Photochem & Photobiology

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Given the current grave problems with antibiotic resistance, the discovery of novel, unconventional antibacterial drugs is not just important but also urgent. In this contribution, we report on the synthesis and testing of several composite nanomaterials that may find applications as therapeutic drugs or surface disinfectants. These materials are based on magnetic nanostructures coated with lignin, for example, lignin@FeCo. The magnetic properties of these nanocomposites facilitate removal or localization, whereas the lignin shell provides biocompatibility. These nanomaterials are mild antibacterials in the absence of light, but when illuminated become powerful antibacterial agents with typically ≥6 log units of bacterial reduction in 1-5 min of irradiation. These materials are strongly absorbing, including in the very useful NIR biological window, which we illustrate using 810 nm LED irradiation. We also show that in the short time required for antibacterial action, thermal changes are very small (≤5°C). Further, biocompatibility tests using fibroblasts show very limited cell damage and no enhanced adverse effect during 810 nm NIR illumination. As a surface coating for the active material, lignin provides a "trojan horse" strategy to facilitate the antibacterial action.

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“…Kumar et al 21 reported that the magnetocrystalline anisotropy increased with increasing crystal size. Basak et al 30 reported that saturation magnetization and magnetocrystalline anisotropy increased with increasing coercivity.…”

Section: Calcination Temperatures (mentioning

confidence: 99%

Characterization and magnetic properties of CoFe₂O₄ nanoparticles synthesized by the co‐precipitation method

Bayça

2023

Int J Applied Ceramic Tech

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In this study, the characterization and magnetic properties of CoFe2O4 nanoparticles synthesized by co‐precipitation method were investigated. The calcined products obtained were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X‐ray (EDAX), Fourier transformed infrared (FTIR) spectroscopy, and vibrating sample magnetometer. Crystallite size and phase composition were analyzed by X‐ray diffraction. Crystallite size and phase composition were analyzed by X‐ray diffraction. The average crystallite size of CoFe2O4 nanoparticles increased in the range of 15.85–32.14 nm with an increase in temperature from 500 to 700°C. It was observed that spherical CoFe2O4 nanoparticles were produced. Synthesis of CoFe2O4 nanoparticles was confirmed using XRD, SEM‐EDAX, and FTIR analyses. The effect of crystallite size, calcination temperature, and lattice parameter on saturation magnetization, remanent magnetization, coercivity, and magnetocrystalline anisotropy were investigated by vibrating sample magnetometer. As the crystallite size value increased, magnetocrystalline anisotropy also increased.

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Calcination effect on structural, morphological and magnetic properties of nano-sized CoFe2O4 developed by a simple co-precipitation technique

Cited by 49 publications

References 67 publications

In-situ construction of Zr-based metal-organic framework core-shell heterostructure for photocatalytic degradation of organic pollutants

In-situ construction of Zr-based metal-organic framework core-shell heterostructure for photocatalytic degradation of organic pollutants

Exploring the Antibacterial Properties of Lignin‐coated Magnetic Nanoparticles Synthesized in a One‐pot Process^†

Characterization and magnetic properties of CoFe₂O₄ nanoparticles synthesized by the co‐precipitation method

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Calcination effect on structural, morphological and magnetic properties of nano-sized CoFe2O4 developed by a simple co-precipitation technique

Cited by 49 publications

References 67 publications

In-situ construction of Zr-based metal-organic framework core-shell heterostructure for photocatalytic degradation of organic pollutants

In-situ construction of Zr-based metal-organic framework core-shell heterostructure for photocatalytic degradation of organic pollutants

Exploring the Antibacterial Properties of Lignin‐coated Magnetic Nanoparticles Synthesized in a One‐pot Process†

Characterization and magnetic properties of CoFe2O4 nanoparticles synthesized by the co‐precipitation method

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Product

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Exploring the Antibacterial Properties of Lignin‐coated Magnetic Nanoparticles Synthesized in a One‐pot Process^†

Characterization and magnetic properties of CoFe₂O₄ nanoparticles synthesized by the co‐precipitation method