Structural and Magnetic Properties of Ni Nanoferrites Doped With Rare Earth and Transition Metals

Yehia, M.; Ismail, S. M.; Ata‐Allah, S.S.; Labib, Sh.; Mohamed, Mai

doi:10.1016/b978-0-12-813904-2.00011-5

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…The crystallite size of the NiFe2O4 and the CoFe2O4 NPs were calculated to be 39.4 nm and 16.5 nm, respectively, and the lattice constants are found to be 8.32 Ǻ and 8.34 Ǻ, respectively, where the lattice parameter of the samples is almost independent of the preparation method and crystallite size [70].…”

Section: Resultsmentioning

confidence: 98%

Synthesis and physical properties of spinel ferrites/MWCNTs hybrids nanocomposites for energy storage and photocatalytic applications

Hezam

Rajeh

Nur

et al. 2020

Physica B: Condensed Matter

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Section: Resultsmentioning

confidence: 98%

Synthesis and physical properties of spinel ferrites/MWCNTs hybrids nanocomposites for energy storage and photocatalytic applications

Hezam

Rajeh

Nur

et al. 2020

Physica B: Condensed Matter

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“…The structure of NiFe2O4 deviated from an inverse spinel structure to a mixed spinel structure due to this cations redistribution or change in the coordination of the tetrahedral and octahedral sites. This deviation from the basic inverse spinel structure resulted in large magnetocrystalline anisotropy [12]. The Ni 2+ and Fe 3+ cations are aligned ferromagnetically in tetrahedral and octahedral lattices while are coupled antiferromagnetically between tetrahedral and octahedral sites [7].…”

Section: Resultsmentioning

confidence: 99%

Neutron Diffraction Study of Multiferroic 0.6NiFe2O4/0.4BaTiO3 Composite

Sukirman

Sarwanto

Ahda

et al. 2020

MST

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Neutron diffraction study on the 0.6NiFe2O4/0.4BaTiO3 multiferroic composite has been carried out. The 0.6NiFe2O4/0.4BaTiO3 multiferroic composites have been synthesized by solid reaction method. In this study, 20 g of BaTiO3 (BTO) and 20 g of NiFe2O4 (NFO) compounds were prepared from the powder raw materials of BaO3 and TiO2 for BTO, and NiO and Fe2O3 for NFO. Furthermore, both BTO and NFO were each crushed for 5 hours using High Energy Milling (HEM). Then the BTO and NFO were calcined in the furnace at 950 °C/5 hours and 900 °C/5 hours, respectively. Both NFO and BTO precursors were manually mixed with a weight percent ratio of NFO:BTO was 100:0, 60:40, and 0:100, hereinafter referred to NFO, NFO/BTO, and BTO, respectively. Then the three samples were pressed into pellets. The pellets were then sintered at 1150 °C/5 hours with a heating rate of about 44.8 °C/min. Once cooled to room temperature within the furnace it was obtained NFO, BTO, and NFO/BTO multiferroic composite. The magnetic properties of the material were observed with the aid of the Vibrating Sample Magnetometer (VSM) instrument. The nuclear structure of BTO, and the magnetic structure of NFO, and NFO/BTO multiferroic composite were determined by neutron diffraction technique using the high resolution powder neutron diffractometer. The cations arrangement of NFO was obtained by whole pattern fitting with the Rietveld method based on neutron diffraction data using FullProf software. The cations arrangement was obtained by refining the occupancy of individual cation at tetrahedral and octahedral sites. The results of the analysis show that both NFO and 0.6NFO/0.4BTO samples have a mixed spinel structure, it means that there are cations of Ni 2+ and Fe 3+ on A-site and B-site. In NFO sample, the cations distribution among the A-site and B-site of NiFe2O4 is [Ni0.002Fe0.852][Ni0.006Fe0.862]2O4. The cations distribution among the A-site and B-site of NiFe2O4 in 0.6NFO/0.4BTO samples is [Ni0.0250Fe0.8975] [Ni0.012Fe0.950]2O4. So, the effect of adding BTO as a composite is to increase Ni 2+ occupancy by 12.5 times on A-site and 2 times on B-site. The magnetic moment of multiferroic 0.6NFO/0.4BTO composite is 2.4(5) µB same as one of NFO. The BTO content in the composite has caused tensile strains induced into the NFO lattice, and at the same time, tensile strains of NFO caused the compressive strain on the c lattice of BTO even though the unit cell volume of BTO is also increasing from 64.100(5) to 64.374(6) Å 3 .

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“…Từ Hình 5 ta thấy, khi ở trong bóng tối, vật liệu NiFe2O4 có khả năng hấp phụ một lượng tetracycline nhất định. Việc hấp phụ tetracycline trên bề mặt vật liệu nói chung và NiFe2O4 nói riêng là một quá trình phức tạp, bao gồm nhiều tương tác khác nhau, trong đó, lực Van der Waals là một trong những nhân tố đóng vai trò quan trọng nhất [12]. Các electron chuyển động bên trong cấu trúc của NiFe2O4 và TC tạo ra lưỡng cực tạm thời, từ đó giúp cho NiFe2O4 có thể bắt giữ tetracycline bằng lực hút Van der Waals.…”

Section: đáNh Giá Hoạt Tính Quang Xúc Tácunclassified

Synthesis of NiFe2O4 Photocatalyst to Apply for Treatment of Residual Tetracycline in Aqueous Environment with Addition of H2O2

Duc,

Hang,

Van

et al. 2024

NST

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In the study, NiFe2O4 was successfully synthesized by hydrothermal method for treatment of residual tetracycline (TC) in aqueous environment. The study also investigated effects of H2O2 as electron an acceptor to enhance TC photocatalytic degradation of the synthesized NiFe2O4. The properties of synthesized materials were determined by scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis absoprtion spectroscopy (UV-VIS) and vibrating sample magnetometer (VSM) systems. The obtained results indicated that the synthesized NiFe2O4 were nano-particles with average size of approximately 50 nm. The synthesized NiFe2O4 also exhibited high visible light absorption and magnetic ability. The TC removal results indicated that the NiFe2O4 adsorbed certain amount of tetracycline under dark condition. Under visible light, the NiFe2O4 further degraded significant tetracycline amount. Finally, the study investigated that H2O2 effectively acted as electron acceptor for hydroxyl radical production to degrade tetracycline.

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Structural and Magnetic Properties of Ni Nanoferrites Doped With Rare Earth and Transition Metals

Cited by 3 publications

References 23 publications

Synthesis and physical properties of spinel ferrites/MWCNTs hybrids nanocomposites for energy storage and photocatalytic applications

Synthesis and physical properties of spinel ferrites/MWCNTs hybrids nanocomposites for energy storage and photocatalytic applications

Neutron Diffraction Study of Multiferroic 0.6NiFe2O4/0.4BaTiO3 Composite

Synthesis of NiFe2O4 Photocatalyst to Apply for Treatment of Residual Tetracycline in Aqueous Environment with Addition of H2O2

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