The influence of the chelating/combustion agents on the structure and magnetic properties of zinc ferrite

Slatineanu, Tamara; Diana, Eliano; Nica, Valentin; Oancea, Victor; Caltun, Ovidiu Florin; Iordan, Alexandra Raluca; Palamaru, Mircea Nicolae

doi:10.2478/s11532-012-0098-y

Cited by 14 publications

(8 citation statements)

References 17 publications

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“…Careful observation of the ZnFe 2 O 4 IR spectra shows a supplementary third absorption band at 674 cm −1 . The presence of this band is explained by the cation exchange between the tetrahedral and octahedral spinel sites which often occurs for zinc ferrite [15].…”

Section: Adsorption Experimentsmentioning

confidence: 92%

Nanosized Spinel Ferrites Synthesized by Sol‐Gel Autocombustion for Optimized Removal of Azo Dye from Aqueous Solution

Samoilă¹,

Cojocaru²,

Creţescu

et al. 2015

Journal of Nanomaterials

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Nanosized spinel ferrites MFe2O4(M = Ni, Co, and Zn) have been prepared by sol-gel autocombustion method using citric acid as a fuel agent. The materials are characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The spinel ferrites have been applied for Congo-Red (CR) dye adsorption using batch technique. Different kinetic and equilibrium models have been fitted by nonlinear regression to analyze the adsorption data. In accordance with Langmuir isotherm, the maximum adsorption capacity at 293 K is 14.06 mg/g for CoFe2O4and 17.13 mg/g for NiFe2O4. The values of mean free energy determined from Dubinin-Radushkevich isotherm are higher than 8 (kJ mol−1), indicating a chemisorption mechanism. Based on the calculated thermodynamic parameters (free energy, enthalpy, and entropy) the adsorption of CR onto ferrites is a spontaneous and endothermic process. Response surface methodology has been applied to construct the multiple regression models for prediction of the adsorption capacity and removal efficiency. The model-based optimization has been performed using genetic algorithms and desirability function approach. The single-objective optimization has yielded a maximum value of color removal efficiency of 98.995%, using NiFe2O4adsorbent. The multiobjective optimization has resulted in the improvement of both removal efficiency and adsorption capacity.

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Section: Adsorption Experimentsmentioning

confidence: 92%

Nanosized Spinel Ferrites Synthesized by Sol‐Gel Autocombustion for Optimized Removal of Azo Dye from Aqueous Solution

Samoilă¹,

Cojocaru²,

Creţescu

et al. 2015

Journal of Nanomaterials

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“…The oxidizer to fuel mixture ratio can be computed in terms of the elemental stoichiometric coefficient (Patil et al 2008). Effect of the chelating/ combustion/fuel agents on the properties of Zn ferrite was reported (Slatineanu et al 2012). Six chelating/combustion agents, viz., citric acid, glucose, tartaric acid, egg white, glycine, and urea, were used to obtain ZnFe 2 O 4 nanoparticles by a sol-gel autocombustion method.…”

Section: Powder Ferrite Nanoparticlesmentioning

confidence: 99%

Ferrites Obtained by Sol-Gel Method

Shirsath

Wang

Jadhav

et al. 2018

Handbook of Sol-Gel Science and Technology

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Ferrites are ferrimagnetic materials, a broad class of magnetic oxides with its remarkable structural, electrical, and magnetic properties making them suitable for a variety of applications. These properties strongly depend upon the method of preparation. Sol-gel method is having countless advantages over other methods to obtain the ferrite with desired nanoarchitecture. In this chapter, the effects of

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“…In the FT‐IR spectra of all products, the appearance peaks at about 3400 and 1600 cm −1 could be attributed to bending and stretching modes of H 2 O, respectively. As seen in Figure a, the peaks at 468 and 582 cm −1 are ascribed to the octahedral (Fe 3+ ‐O) and tetrahedral (Ni 2+ /Fe 3+ ‐O) frameworks of iron or nickel ions, respectively . Because of the previous investigation, FT‐IR spectra show that NiFe 2 O 4 was successfully synthesized .…”

Section: Resultsmentioning

confidence: 92%

Novel NiFe/Si/Au magnetic nanocatalyst: Biogenic synthesis, efficient and reusable catalyst with enhanced visible light photocatalytic degradation and antibacterial activity

Shirzadi‐Ahodashti

Ebrahimzadeh

Amiri

et al. 2020

Applied Organom Chemis

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The aim of this paper is to biosynthesize NiFe2O4/SiO2/Au (NiFe/Si/Au) magnetic nanocatalyst using the sonochemical method. This is the first study to synthesize this compound using this method. To obtain optimum morphology and size of products, the synthesis was performed in the presence of polyvinylpyrrolidone, maltose, glucose, and fructose as capping agents and Crataegus pentagyna leaf extract and NaBH4 as reducing agents. Vibrating‐sample magnetometer, field‐emission scanning electron microscopy, Fourier‐transform infrared, transmission electron microscopy, X‐ray diffraction, energy‐dispersive X‐ray spectroscopy, and differential reflectance spectroscopy techniques were performed to confirm the preparation of magnetic products. The as‐synthesized magnetic samples were used to enhance the photocatalytic degradation and antibacterial activity. The NiFe/Si/Au nanocatalysts exhibited an excellent photocatalytic activity by degradation of rhodamine b, methylene blue, and erythrosine as organic contaminants under ultraviolet and visible light irradiation. The degradation curves illustrate that the degradation of anionic dyes is more than that of cationic dyes. In addition, antibacterial activity of as‐prepared nanocatalyst against seven bacterial species was investigated. Because of their antibacterial effects, as‐synthesized products show a high antibacterial activity against various bacteria. Consequently, the NiFe/Si/Au nanocatalysts with high antibacterial activity and excellent potential photocatalyst activity can be used in environmental and medical sciences for wastewater treatment.

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The influence of the chelating/combustion agents on the structure and magnetic properties of zinc ferrite

Cited by 14 publications

References 17 publications

Nanosized Spinel Ferrites Synthesized by Sol‐Gel Autocombustion for Optimized Removal of Azo Dye from Aqueous Solution

Nanosized Spinel Ferrites Synthesized by Sol‐Gel Autocombustion for Optimized Removal of Azo Dye from Aqueous Solution

Ferrites Obtained by Sol-Gel Method

Novel NiFe/Si/Au magnetic nanocatalyst: Biogenic synthesis, efficient and reusable catalyst with enhanced visible light photocatalytic degradation and antibacterial activity

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