Synthesis and Characterization of Photocatalytic MnFe2O4 Nanoparticles

Desai, Harshal B.; Hathiya, Laxmi J.; Joshi, H. H.; Tanna, Ashish R.

doi:10.1016/j.matpr.2020.01.248

Cited by 38 publications

(22 citation statements)

References 12 publications

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“…Properties of ferrites depend on their composition and microstructure, which in turn depend on their synthesis processes. There are various chemical and physical methods [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ] to synthesize ferrite nanoparticles, such as chemical co-precipitation, sol-gel auto combustion (i.e., combustion of solution of metal salts and organic fuel forms a gel), reverse micelle, microwave hydrothermal, sonochemical, forced hydrolysis, one-step, high energy ball milling, solvothermal, and microemulsion method. Chemical co-precipitation has several advantages over others, such as (i) uniform and homogeneous nanoparticles of semi-spherical sizes, (ii) control of particle size by varying the reaction parameters such as reaction temperature and pH of the solution, (iii) composition flexibility, (iv) facile, and (v) large scale preparation technique.…”

Section: Introductionmentioning

confidence: 99%

Manganese Ferrite Nanoparticles (MnFe2O4): Size Dependence for Hyperthermia and Negative/Positive Contrast Enhancement in MRI

et al. 2020

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We synthesized manganese ferrite (MnFe2O4) nanoparticles of different sizes by varying pH during chemical co-precipitation procedure and modified their surfaces with polysaccharide chitosan (CS) to investigate characteristics of hyperthermia and magnetic resonance imaging (MRI). Structural features were analyzed by X-ray diffraction (XRD), high-resolution transmission electron microscopy (TEM), selected area diffraction (SAED) patterns, and Mössbauer spectroscopy to confirm the formation of superparamagnetic MnFe2O4 nanoparticles with a size range of 5–15 nm for pH of 9–12. The hydrodynamic sizes of nanoparticles were less than 250 nm with a polydispersity index of 0.3, whereas the zeta potentials were higher than 30 mV to ensure electrostatic repulsion for stable colloidal suspension. MRI properties at 7T demonstrated that transverse relaxation (T2) doubled as the size of CS-coated MnFe2O4 nanoparticles tripled in vitro. However, longitudinal relaxation (T1) was strongest for the smallest CS-coated MnFe2O4 nanoparticles, as revealed by in vivo positive contrast MRI angiography. Cytotoxicity assay on HeLa cells showed CS-coated MnFe2O4 nanoparticles is viable regardless of ambient pH, whereas hyperthermia studies revealed that both the maximum temperature and specific loss power obtained by alternating magnetic field exposure depended on nanoparticle size and concentration. Overall, these results reveal the exciting potential of CS-coated MnFe2O4 nanoparticles in MRI and hyperthermia studies for biomedical research.

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Section: Introductionmentioning

confidence: 99%

Manganese Ferrite Nanoparticles (MnFe2O4): Size Dependence for Hyperthermia and Negative/Positive Contrast Enhancement in MRI

et al. 2020

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“…The photodegradation of methylene blue using MnFe2O4 nanoparticles showed an identical trend, where the addition of H2O2 increased the effectiveness of removal to a specific concentration. Subsequently, the effectiveness remained constant [12]. The most remarkable effectiveness was observed with 2.0 mM H2O2 addition.…”

Section: Photocatalytic Degradation Of Congo Red Dyementioning

confidence: 86%

“…NiFe2O4 nanoparticles, with the help of visible light irradiation, instigate electrons to move to CB, leaving electron holes in VB [37]. Subsequently, a reaction with water occurs, producing hydroxyl radicals that degrade the dye into intermediate compounds with shorter carbon chains and simpler compounds [8,12]. H2O2 plays a role in multiplying the number of hydroxyl radicals, thus accelerating the degradation process.…”

Section: Effect Of Visible Light Irradiationmentioning

confidence: 99%

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Preparation of NiFe2O4 Nanoparticles by Solution Combustion Method as Photocatalyst of Congo red

Hariani

Said

Rachmat

et al. 2021

Bull. Chem. React. Eng. Catal.

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NiFe2O4 nanoparticles had been successfully synthesized by solution combustion method using urea fuel (organic precursor). The synthesized NiFe2O4 were characterized by X-ray diffraction (XRD), Scanning electron microscopy-Electron Dispersive X-ray Spectroscopy (SEM-EDs), Transmission Electron Microscopy (TEM), Fourier Transform Infra-Red (FTIR), Vibrating Sample Magnetometer (VSM), UV-Vis Diffuse Reflectance Spectroscopy (UV-Vis DRS), and Point of Zero Charge (pHpzc). NiFe2O4 nanoparticles irradiated with visible light were employed to degrade Congo red dye with the following variable: solution pH (3–8), H2O2 concentration (0.5–3 mM), and Congo red concentration (100–600 mg/L). XRD analysis results showed that the NiFe2O4 nanoparticles had a cubic spinel structure. The particle sizes are in the range of 10–40 nm. The magnetic properties of NiFe2O4 nanoparticles determined using VSM showed a magnetization saturation value of 47.32 emu/g. UV-Vis DRS analysis indicated that NiFe2O4 nanoparticles had an optical band gap of 1.97 eV. The success of synthesis was also proven by the EDS analysis results, which showed that the synthesized NiFe2O4 nanoparticles composed of Ni, Fe, and O elements. The removal efficiency of Congo red dye was 96.80% at the following optimum conditions: solution pH of 5.0, H2O2 concentration of 2 mM, Congo red dye concentration of 100 mg/L, and contact time of 60 min. The study of the photodegradation kinetics follows a pseudo-first order reaction with a rate constant value of 0.0853 min−1. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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“…Amulys et al, [7] synthesized nanostructured spinel MnFe2O4 with different grain sizes ranging from 16 to 24 nm and studied their photocatalytic activities. H. B. Desai et al, [8] reported MnFe2O4 with an auto combustion process of 40 nm grain size for photocatalytic applications. S. V. Bhandare, et al, [9] prepared MnFe2O4 nanoparticles by sol gel combustion synthesis and analyzed their magnetic properties for different annealing temperature.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of microstructural, magnetic properties and surface/near-surface chemical state analysis of Mn-CuFe2O4 nanoparticle

Balamurugan²

2021

Int. Res. J. multidiscip. Technovation

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Nanocrystalline Mn substituted CuFe2O4 nanoparticles (MCFNPs) were synthesized using urea and egg white. The effects of heat treatment on crystal structure and magnetic properties have been studied using X-ray diffractometer (XRD) and Vibrating Sample Magnetometer (VSM). The single-phase cubic spinel structure of as synthesized MCFNPs was recognized from XRD profile. There are some impurity peaks in the annealed samples, which are the decomposition of the ferrites at higher annealing temperatures to the α-Fe2O3 phase. The crystallite size and Lattice parameter of the samples increases with annealing temperature. The crystallite sizes of the MCFNPs were found in the range ~10 to 55 nm. The morphology and particle size of the sample (annealed at 900 ℃) have been recorded through SEM and TEM. The secondary non-magnetic impurity phase influences the magnetic nature of the samples. The saturation magnetization (Ms) decreases at a temperature of 600 ℃ due to the presence of non-magnetic α-Fe2O3 phase. The surface / near-surface chemical states of the 900 °C annealed MCFNPs were analyzed using XPS within a range of 0-1000eV binding energies.

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Synthesis and Characterization of Photocatalytic MnFe2O4 Nanoparticles

Cited by 38 publications

References 12 publications

Manganese Ferrite Nanoparticles (MnFe2O4): Size Dependence for Hyperthermia and Negative/Positive Contrast Enhancement in MRI

Manganese Ferrite Nanoparticles (MnFe2O4): Size Dependence for Hyperthermia and Negative/Positive Contrast Enhancement in MRI

Preparation of NiFe2O4 Nanoparticles by Solution Combustion Method as Photocatalyst of Congo red

Evaluation of microstructural, magnetic properties and surface/near-surface chemical state analysis of Mn-CuFe2O4 nanoparticle

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