Synthesis Of Iron-based Nanoparticles Research Articles

Green synthesis of iron nanoparticles using mulberry leaf extract: characterization, identification of active biomolecules, and catalytic activity.

The synthesis of iron-based nanoparticles (Fe NPs) using traditional preparation methods suffered from the disadvantages of high cost, environmental harm, and easy agglomeration. In this study, a novel eco-friendly method was proposed for the synthesis of iron nanomaterials (ML-Fe NPs): using antioxidant components extracted from mulberry leaf to reduce divalent iron (II). The preparation conditions of ML-Fe NPs were optimized by orthogonal tests. The prepared ML-Fe NPs exhibited an amorphous core-shell structure, displaying excellent dispersion and stability. During the synthesis process of ML-Fe NPs, the polyphenol molecules in mulberry leaf extract played a dominant role. A possible synthetic mechanism involving complexation, reduction, and encapsulation was proposed. Furthermore, the ML-Fe NPs were utilized to construct an ML-Fe NPs/peroxymonosulfate catalytic system for the degradation of Rhodamine B dye wastewater. The ML-Fe NPs demonstrated remarkable catalytic potential, achieving a 99% degradation efficiency for Rhodamine B within a span of 40min.

Plant-mediated synthesis of iron nanoparticles for environmental application: Mini review

Iron-based nanoparticles (INPs) are among the most intriguing novel materials due to their high magnetic properties and catalytic activities. Recent research has shifted to the development of novel clean and sustainable synthesis protocols using plant extract. This review summarizes recent advance in the synthesis of INPs using different plant sources as the reducing or capping/stabilizing agents. The associated green synthesis protocols and its limitation, characterization techniques and recommendations for future work in this area are also discussed. The present mini review may provide insight into plant-based synthesis of novel INPs for environmental remediation application.

Synthesis of iron-based nanoparticles assembled with layered double hydroxides: structural and magnetic properties study

ABSTRACT In the recent decade, magnetic compounds have attracted a great deal of interest due to their magnetic behaviour allowing them to be a good candidate for catalytic and biomedical applications. However, the problem of these materials is their aggregation during the synthesis process, and then problems related to particle size. To overcome these problems, an efficient assembly of magnetic nanoparticles with layered double hydroxides compound systems (Fe-NPs@LDH and M/Fe-NPs@LDH; M = Mn, Zn) were prepared by simple co-precipitation process. Analytical tools including TG-dTG, XRD, FTIR, SEM/EDX and BET were used to investigate the thermal, morphological, structural and textural properties of the studied materials. The magnetic properties of the composite were investigated by mean 57Fe Mossbauer spectrometry.

Synthesis of iron-based nanoparticles from ferrocene by femtosecond laser irradiation: Suppression of the particle growth in a mixture of water and hexane

Iron-based nanoparticles show unique magnetic properties, and their syntheses from metal complex solution by pulsed lasers have been widely studied; however, the aggregation of nanoparticles is unavoidable in homogeneous solution. We report the production of water-dispersible iron-based nanoparticles in a mixture of water and ferrocene n-hexane solution by femtosecond laser irradiation without using any additive agents. The mean diameter of iron-based nanoparticles (ca. 7 nm) is independent on the concentration of ferrocene and laser irradiation time. We propose that hexane microdroplets dispersed in water act as reaction vessels and reduce the opportunity of aggregation of primary nanoparticles.

Synthesis of iron-based nanoparticles and comparison of their catalytic activity for degradation of phenolic waste water in a small-scale batch reactor

In the present work, iron-based nanoparticles were synthesized by sol–gel method (iron oxide I), modified co-precipitation method (iron oxide II), reduction of FeSO4 by NaBH4 (nano zero-valent iron I, nZVI I), and reduction of FeSO4 by NaBH4 in presence of chelating ligand EDTA (nZVI II) for use as a catalyst for degradation of phenol. Particle characterization was performed for each set of samples by UV–vis spectra, X-ray diffraction, Fourier transformed infrared spectroscopy (FTIR), dynamic light scattering (DLS), and field emission scanning electron microscopy (FESEM). FESEM was performed with iron oxide II and particle size was found to be 36.5 nm. The average particle diameter obtained for nZVI was in the range of 141–150 nm. nZVI(II) has been found to be most efficient with respect to high percentage degradation of phenol in an hour under optimum operating condition at room temperature which were as follows: catalyst concentration = 0.05 g/l, pH 3, phenol:hydrogen peroxide (50%) concentration = 1:14 (stoichiometric ratio), temperature = ambient. Brunauer–Emmett–Teller (BET) surface area measurement also showed higher surface area for nano zero-valent iron (nZVI) particles than compared to other iron oxides. The initial phenol concentration was varied in the range of 50–400 mg/l. Degradation efficiency was found decreasing with increasing initial concentration of phenol. Iron oxide I and II can be successfully recovered and reused.

Synthesis of iron-based nanoparticles by green tea extract and their degradation of malachite

In this paper, green tea extract was used to synthesize iron nanoparticles (GT-Fe NPs) and degrade malachite green (MG) in aqueous solution. The results show that the damage to morphology and increase in size of GT-Fe NPs after reaction with MG were observed by SEM and EDS. XRD shows that there are few changes in the characteristic peaks of GT-Fe NPs before and after reaction. UV–vis spectroscopy shows that the absorption peak of MG decreased, while FTIR shows that the band at 1585cm−1 corresponded to the phenyl after reaction. The factors impacting on the removal efficiency of MG, including the initial solution pH, the initial concentration of MG, the dosage of GT-Fe NPs, and the reaction temperature, was also investigated. It emerged that 96% of MG was removed with a 50mg/L at 298K. Kinetics studies showed that the removal of MG fitted well to the pseudo first-order mode.

Synthesis of iron-based nanoparticles using oolong tea extract for the degradation of malachite green

Iron-based nanoparticles (OT-FeNP) were synthesized using oolong tea extracts. Their morphology, structure and size were confirmed by scanning electron microscopy (SEM), X-ray energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), UV–visible (UV–vis) and Fourier Transform Infrared spectroscopy (FTIR). Formation of FeNP results in mostly spherical particles with diameters ranging from 40 to 50nm. Degradation of malachite green (MG) using OT-FeNP demonstrated that kinetics fitted well to the pseudo first-order reaction by removing 75.5% of MG (50mg/L). This indicated that OT-FeNP has the potential to serve as a green nanomaterial for environmental remediation.