Synthesis of nickel zinc iron nanoparticles by coprecipitation technique

Velmurugan, K.; Venkatachalapathy, Vellaiyappan Sangli Karuppanan; Sendhilnathan, S.

doi:10.1590/s1516-14392010000300005

Cited by 73 publications

(22 citation statements)

References 33 publications

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“…. From the FTIR spectrum for N1, the bare magnetic nanoparticles exhibit peaks between 3500 and 3350 cm −1 , due to –OH stretch band corresponding to the hydroxyl group attached to the surface of the ferrite nanoparticles and retained in the samples prepared by coprecipitation . The band appearing at 1550–1450 cm −1 and 960–875 cm −1 is attributed to the in‐plane and out‐plane –OH bonds, respectively .…”

Section: Resultsmentioning

confidence: 99%

Tuneable thermoresponsive hybrid magnetic nanoparticles: preparation, characterization and drug release characteristics

Kumar

Saikia²,

Kaur

et al. 2016

J. Chem. Technol. Biotechnol.

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BACKGROUND: Thermoresponsive hybrid Ni 0.5 Zn 0.5 Fe 2 O 4 magnetic hydrogel particles based on PEG-g-poly(NIPAM-co-AMPS) were synthesized by soap-free emulsion polymerization of N-isopropylacrylamide (NIPAM) and 2-acrylamido-2-methylpropane sulphonic acid (AMPS) via a free radical mechanism using polyethylene glycol (PEG) as macro-initiator in the presence of N,N'-Methylenebisacrylamide (MBA) as crosslinking agent. The thermoresponsive pure copolymers and hybrid particles were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM) and dynamic light scattering (DLS). Furthermore, the hybrid magnetic particles were used to study the drug release characteristics of theophylline (TPH) as model drug at pH 7.4 and temperature 37 ∘ C. RESULTS:The sizes of the particles were found to be 121 nm to 245 nm at 50 ∘ C and 580 nm to 694 nm at 25 ∘ C depending on the amount of AMPS present in the hybrid particles. The volume phase transition temperature (VPTT) of the hybrid particles was tuned above body temperature from 33 ∘ C to 41 ∘ C. The hybrid magnetic particles with incorporation of AMPS in polymer chains showed high TPH loading capacity compared with that of PEG-g-PNIPAM. The entrapment efficiency of TPH was increasing with increase of AMPS concentration. The releasing capacity of TPH was decreased with increase in AMPS concentration and observed to have sustained drug release profile without initial burst release. CONCLUSIONS: The prepared hybrid particles were both temperature sensitive as well as superparamagnetic, and thus found to be a suitable candidate for applications in targeted drug delivery system. Drug loading capacity and efficiencyThe entrapment efficiency and loading capacity of the TPH for PN0, PN2 and PN4 were calculated using Equation (1) and found to be 88.2%, 89.7% and 92.07% and when calculated using

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Section: Resultsmentioning

confidence: 99%

Tuneable thermoresponsive hybrid magnetic nanoparticles: preparation, characterization and drug release characteristics

Kumar

Saikia²,

Kaur

et al. 2016

J. Chem. Technol. Biotechnol.

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“…It can be further corroborated that, when Zn (nonmagnetic ion) is substituted by magnetic ions such as Ni, the magnetic properties change substantially. [35][36][37] The site occupancy of the dopant depends on the preferential site it occupies in the spinel ferrite. If a dopant ion goes to the tetrahedral site, it may not appreciably affect the local environment of (Fe 3+ ); however, when the dopant ion has preference for the octahedral site, (Fe 3+ ) ions are forced to move to the tetrahedral site and major changes are observed in the local environment of (Fe 3+ ) ions.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Cationic Distribution in Zn1−x Ni x Fe2O4 (x = 0.0 to 1.0) by Employing X-ray Absorption Fine Structure Spectroscopy

Akhtar

2015

Journal of Elec Materi

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In the present study, x-ray absorption fine structure (XAFS) spectroscopy has been employed to investigate the cationic distribution in Zn 1Àx Ni x Fe 2 O 4 (x = 0.0 to 1.0) spinel ferrites. The phase purity and lattice parameters of freshly synthesized Zn 1Àx Ni x Fe 2 O 4 were verified by laboratory x-ray diffraction analysis. It is observed that lattice parameters decrease with increase in the Ni concentration, while the system retains cubic symmetry in Fd3m space group. To investigate the local structural environment and cationic distribution, XAFS data were collected at room temperature for the Fe, Zn, and Ni K-edges in Zn 1Àx Ni x Fe 2 O 4 , using the x-ray absorption facilities of the Elettra synchrotron source, Trieste, Italy. In the case of Fe, pre-edge features provide valuable information regarding the octahedral or tetrahedral site occupancy, while Zn and Ni edges do not show any appreciable change in the near-edge region. From extended x-ray absorption fine structure (EXAFS) spectroscopy, it is observed that all Zn and Ni atoms occupy tetrahedral and octahedral sites, respectively, whereas Fe atoms occupy octahedral sites in ZnFe 2 O 4 but for the other compositions are present at both octahedral and tetrahedral sites. The occupancy of Fe at octahedral sites decreases with increasing Ni concentration in Zn 1Àx Ni x Fe 2 O 4 . These results demonstrate that the local environment of Zn does not show significant variations as the changes at second nearest neighbors are due to Fe and Ni, which have similar scattering factors. However, variations in the Ni surroundings are due to the change of Fe and Zn ratio at A sites, having a relatively larger difference in scattering factor. However, the changes observed in the EXAFS spectra of Fe are a consequence of variation in the occupancy of Fe at tetrahedral and octahedral sites.

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“…The smaller size and uniform distribution of sand is necessary for the effectiveness of synthesis. Thus, it can the increasing the utilizing of ironsands [2] in Lampung Tengah. Magnetit Fe3O4 in nano scale can be widely used in industrial raw material especially in electronic material which its demand is increasing lately.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Mineral Content of Lampung Tengah Ironsands

Puspitarum

safitri

Ardiyanti

et al. 2019

JSAT

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Characteristics and Mineral Content of Lampung Tengah Ironsands. This study is carried out to investigate the characteristics and mineral content of ironsands from Bekri, Lampung Tengah Regency by using precipitation method. The research was conducted in Physics Laboratory of Institut Teknologi Sumatera from June to September 2018. Mineral content of sand is analayzed with X-Ray Diffractometer. The extraction was varied in temperature and stirring time. The temperature is varied in 80oC, 120oC, dan 160oC and yields different size; 33.76 nm, 11.84 nm and 11.14 nm. Meanwhile, the extraction is varied for 2 hours, 4 hours and 6 hours stirring and yields particle with 43.12 nm, 11.14 nm and 11.32 size. Mineral content of ironsands in Lampung Tengah are dominated by Ilmenite and Potassium Chloride.

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Synthesis of nickel zinc iron nanoparticles by coprecipitation technique

Cited by 73 publications

References 33 publications

Tuneable thermoresponsive hybrid magnetic nanoparticles: preparation, characterization and drug release characteristics

Tuneable thermoresponsive hybrid magnetic nanoparticles: preparation, characterization and drug release characteristics

Investigation of Cationic Distribution in Zn1−x Ni x Fe2O4 (x = 0.0 to 1.0) by Employing X-ray Absorption Fine Structure Spectroscopy

Characteristics and Mineral Content of Lampung Tengah Ironsands

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