Structural and electromagnetic studies of Ni0.7Zn0.3Ho2xFe2−2xO4 ferrites

Ghafoor, Abdul; Khan, Muhammad Azhar; Islam, M.U.; Gilani, Zaheer Abbas; Manzoor, Alina; Khan, Hasan M.; Ali, Irshad; Warsi, Muhammad Farooq

doi:10.1016/j.ceramint.2016.06.054

Cited by 40 publications

(16 citation statements)

References 27 publications

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“…A huge number of NPs, (Ag, Au, Zn, etc.) have been synthesized by inorganic methods of physical chemistry techniques, which are having much importance in different applications, such as sensors, electronic and optical devises, catalysts, environmental remediation, antimicrobial and anticancer therapy ,,. Green NPs, play a vital role in devising alternative and more efficient strategies for the treatment of many ailments .…”

Section: Introductionmentioning

confidence: 99%

Biocompatible Tin Oxide Nanoparticles: Synthesis, Antibacterial, Anticandidal and Cytotoxic Activities

et al. 2019

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Biocompatible SnO 2 NPs, were synthesized by simple and facile ultrasonic technique, and further studied for antibacterial, anticandidal and invitro cytotoxic activity. The obtained size of synthesized SnO 2 NPs, was 5-30 nm and characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The evaluation of antibacterial and anticandidal activity of the SnO 2 NPs, was done by determining the minimum inhibitory concentration (MIC), and minimum bactericidal/fungicidal concentration (MBC/MFC), against Escherichia coli and Candida albicans, respectively. The MIC of 0.5 mg/ml and MBC of > 1 mg/ml for E. coli, while as the MIC of 8 mg/ml and MFC > 16 mg/ml for C. albicans, was obtained. Maximum activity for both, bacteria and Candida was achieved, however, to the best of our knowledge, this is the first report of anticandidal activity exhibited by SnO 2 NPs. Treatment of synthesized SnO 2 NPs against the colorectal (HCT-116) cancer cell line, decreased the cell survivability in a dose-dependent manner, as lower dose showed decrease of 73.00%, whereas, higher dosage caused a significant 31.34% decrease in the cell viability. The obtained results confirmed, that the prepared SnO 2 NPs can be the future broad-spectrum antibacterial, anticandidal and anticancer agent, and can be further explored for application in the biomedical field.promising potential for use in the pharmaceutical and biomedical applications. Supporting information summaryThe experimental section includes the detailed procedure for synthesis, characterization, antibacterial, anticandidal and cytotoxic activities of Tin Oxide NPs (SnO 2 NPs), which can be find in supporting information.

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Section: Introductionmentioning

confidence: 99%

Biocompatible Tin Oxide Nanoparticles: Synthesis, Antibacterial, Anticandidal and Cytotoxic Activities

et al. 2019

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“…However, upon further increasing the Ho 3+ doping level, the M s value of the specimens gradually decreases because the incorporation of Ho 3+ on the B sites reaches saturation, as demonstrated by the XRD results in Section IIIA. Meanwhile, the replacement of Fe 3+ ions on the B sites by Ho 3+ drives a small portion of Ni 2+ and Fe 3+ ions to migrate to the A sites (also see the XPS results presented in Figure ) . Consequently, the magnetic moment on the A sites is enhanced.…”

Section: Resultsmentioning

confidence: 89%

“…The peak at approximately 855 eV with a satellite peak at approximately 861 eV is attributed to Ni 2+ ions in the specimens. 24,25 Interestingly, after the doping of Sm 3+ and/or Ho 3+ ions, which preferably occupy the octahedral B sites, 22,23 a peak shift appears in the spectra, which is clearly observed from the fitted three peaks (see the strong and sharp peak centered at 854.7-855.0 eV, the weak broad peak at 856.2-856.5 eV, and its satellite peak). These results indicate that although Ni 2+ ions are preferably located in the B sites of the ferrites, some of the dopants might migrate from the B sites to the A sites or exist in other forms of nickel oxides.…”

Section: Compositional and Structural Propertiesmentioning

confidence: 99%

“…This behavior causes the volatilization of Zn 2+ , finally leading to the generation of pores during sintering. Consequently, the movement of grain boundaries is impeded, 23 and the porosity increases. As seen in Table 1, compared to those of the undoped ferrite, both the apparent and relative densities of the specimens decrease after the doping of Sm 3+ ions and gradually decrease as the addition amount of Ho 3+ increases.…”

Section: Compositional and Structural Propertiesmentioning

confidence: 99%

“…Figure 1). 23 Consequently, the magnetic moment on the A sites is enhanced. This competition finally leads to a decrease in the M s values of the samples.…”

Section: Magnetic Performancementioning

confidence: 99%

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Microstructure, magnetism, and high‐frequency performance of polycrystalline Ni_0.5Zn_0.5Sm_0.025Ho_xFe_1.975−_xO₄ ferrites

Yang

Liu

et al. 2019

J Am Ceram Soc

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Novel polycrystalline Ni0.5Zn0.5Sm0.025HoxFe1.975−xO4 (x = 0‐0.06) ferrites were fabricated by a traditional solid‐state reaction sintering method. The codoping effects of Sm and Ho on the microstructure, magnetism, and high‐frequency performance of Ni–Zn ferrites were investigated. The substitution of Sm3+ and Ho3+ ions led to an apparent increase in the lattice constants. However, further increasing the addition of both dopants introduced SmFeO3 or HoFeO3 foreign phases at the boundaries of the polycrystalline grains. As the content of Ho3+ ions increased, the relative density and average grain size of the specimens decreased accordingly. Moreover, the substitution of Sm3+ clearly decreased the saturation magnetization and complex permeability, which further decreased with the doping of Ho3+. The evolution of the Curie temperature showed an opposite trend, reaching the highest temperature of 278°C when x = 0.03. Similarly, the coercivity and resonance frequencies also displayed opposite trends compared to those of the saturation magnetization and complex permeability. The codoping of Sm3+ and Ho3+ more effectively lowered the magnetic and dielectric loss tangent of the specimens compared with the undoped or single dopant modified ferrites.

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Structural, dielectric and electric modulus analysis of praseodymium-substituted SrPrxFe12-X O19 nanoparticles synthesized via micro-emulsion

et al. 2023

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Structural and electromagnetic studies of Ni0.7Zn0.3Ho2xFe2−2xO4 ferrites

Cited by 40 publications

References 27 publications

Biocompatible Tin Oxide Nanoparticles: Synthesis, Antibacterial, Anticandidal and Cytotoxic Activities

Biocompatible Tin Oxide Nanoparticles: Synthesis, Antibacterial, Anticandidal and Cytotoxic Activities

Microstructure, magnetism, and high‐frequency performance of polycrystalline Ni_0.5Zn_0.5Sm_0.025Ho_xFe_1.975−_xO₄ ferrites

Structural, dielectric and electric modulus analysis of praseodymium-substituted SrPrxFe12-X O19 nanoparticles synthesized via micro-emulsion

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Structural and electromagnetic studies of Ni0.7Zn0.3Ho2xFe2−2xO4 ferrites

Cited by 40 publications

References 27 publications

Biocompatible Tin Oxide Nanoparticles: Synthesis, Antibacterial, Anticandidal and Cytotoxic Activities

Biocompatible Tin Oxide Nanoparticles: Synthesis, Antibacterial, Anticandidal and Cytotoxic Activities

Microstructure, magnetism, and high‐frequency performance of polycrystalline Ni0.5Zn0.5Sm0.025HoxFe1.975−xO4 ferrites

Structural, dielectric and electric modulus analysis of praseodymium-substituted SrPrxFe12-X O19 nanoparticles synthesized via micro-emulsion

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Microstructure, magnetism, and high‐frequency performance of polycrystalline Ni_0.5Zn_0.5Sm_0.025Ho_xFe_1.975−_xO₄ ferrites