Magnetic and Catalytic Properties of Cu x Fe1−x Fe2O4 Nanoparticles

Amir, Muhammad; Sertkol, M.; Baykal, A.; Sözeri, H.

doi:10.1007/s10948-015-3050-5

Cited by 22 publications

(4 citation statements)

References 27 publications

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“…On the other hand, in Figure 2 a, lattice distortion of GION increased with the content of the Gd element in ION, which could be explained that the larger size of the Gd atom occupied the site of the Fe atom. [ 33,34 ] X-ray photoelectron spectroscopy (XPS) analysis confi rmed the presence of Fe and Gd, O, C, and N in the GION (Figure 2 b). Further analysis of the Fe2p peaks in the XPS spectrum of GION showed the Fe2p1/2 and Fe2p3/2 peaks at 711.4 and 724.6 eV (Figure 2 c), respectively, thus confi rming the presence of Fe(III).…”

Section: Synthesis and Characterization Of Gionmentioning

confidence: 86%

Gadolinium‐Doped Iron Oxide Nanoprobe as Multifunctional Bioimaging Agent and Drug Delivery System

Zhang

et al. 2015

Adv Funct Materials

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In this study, a high-performance T 1 -T 2 dual-model contrast agent by gadolinium-doped iron oxide nanoparticle (GION) is developed. Following its development, the application of this agent in vivo by combining doxorubicin (DOX) and folic acid (FA) (FA-GION-DOX) for targeted drug delivery to monitor cancer treatment is explored. GION showed transverse and longitudinal relaxivities up to 182.7 × 10 −3 and 7.87 × 10

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Section: Synthesis and Characterization Of Gionmentioning

confidence: 86%

Gadolinium‐Doped Iron Oxide Nanoprobe as Multifunctional Bioimaging Agent and Drug Delivery System

Zhang

et al. 2015

Adv Funct Materials

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“…From the VSM measurements, saturation magnetization (M s ), remanent magnetization (M r ), and coercivity (H c ) values are evaluated and reported in Table 3. LaMg x Fe 1−x O 3−δ nanocrystalline shows a considerable saturation magnetization (M s ) at room temperature and the M s values decreased with the increase Mg content [14][15][16][17]. It may be because the magnetic nature of Fe 3+ (5 μB) ions was replaced by the nonmagnetic nature of [43].…”

Section: Vsm Measurementsmentioning

confidence: 99%

“…The substitution of nonmagnetic Mg 2+ ion in LaFeO 3−δ changes their physicochemical and magnetic properties. The magnetic properties of ferrites are affected by composition as well as the type of substitution, cation distribution, and method of preparation [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Properties and Humidity-Sensing Studies of Magnetically Recoverable LaMg x Fe1−x O 3−δ Perovskites Nano-photocatalysts by Sol-Gel Route

Teresita¹,

Manikandan

Josephine³

et al. 2016

J Supercond Nov Magn

115

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Nanostructured perovskite mixed metal oxides, LaMg x Fe 1−x O 3−δ (x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0), were synthesized successfully by a simple sol-gel route. The formation of single-phase perovskite oxides structure was confirmed by powder X-ray diffraction (XRD) analysis. The average crystallite size of the samples was evaluated using Sherrer's formula. The presence of functional groups and metal oxide bonds was confirmed by Fourier transform infrared (FT-IR) analysis. Brunauer-Emmett-Teller (BET) surface adsorption studies showed better surface area of the compositions, which was further, evidenced by scanning electron microscopy (SEM) analysis. Room temperature vibrating sample magnetometer (VSM) analysis was confirmed that the superparamagnetic nature and the magnetization values decreased with increase in Mg-dopant. The samples were subjected to dc electrical conductivity studies at room temperature. The dc resistance measurements as a function of relative humidity (RH) at 5, 31, 51, 79, and 98 % were carried out on sintered discs at 25 • C under static conditions, which sensitivity factor S f (R 5% / R 95% ) A. Manikandan were calculated for LaMg x Fe 1−x O 3−δ . The temperaturedependent conductance was also carried out in the range of 100-300 • C as suggested, and the activation energy was determined. Sample LaMgFe-4 (x = 0.6) possessed the highest humidity-sensing factor (12,926.03 ± 387), while LaFeO 3 (x = 0) possessed the lowest sensitivity factor (41.66 ± 3). The response and recovery characteristics were studied for LaMgFe-4, which exhibited a very good narrow hysteresis loop. The photocatalytic degradation (PCD) of methylene blue (MB) dye was investigated under UVvisible light and the sample LaMgFe-4 showed better PCD efficiency than other samples, due to the smaller particle size and higher surface area.

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“…This NC can be synthesized with different structures by various methods such as sol-gel, polyol, solvothermal, hydrothermal, co-precipitation and ball milling [35][36][37][38]. Though advantageous, these strategies have drawbacks like energy overriding, higher temperature requirement and complicated apparatus.…”

Section: Introductionmentioning

confidence: 99%

MnFe2O4/ZrO2 nanocomposite as an efficient magnetically separable photocatalyst with good response to sunlight: preparation, characterization and catalytic mechanism

Meena¹,

Anantharaju

Vidya³

et al. 2020

SN Appl. Sci.

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Magnetically separable novel nano-MnFe 2 O 4 /ZrO 2 nanocomposite (NC) and MnFe 2 O 4 (MFO) samples were synthesized by an efficient solution combustion methodology. The structure, morphology and optical properties were characterized through powder X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy and UV-Vis spectroscopy. The photocatalytic activity of MnFe 2 O 4 /ZrO 2 nanocomposite was analysed for decolourization efficiency of methylene blue (MB) and textile dye wastewater under natural sunlight irradiation. The results demonstrated that the decolourization response of the MnFe 2 O 4 /ZrO 2 nanocomposite was 95% for MB and 59% for textile dye wastewater in 90 min. The photocatalytic performance of MnFe 2 O 4 /ZrO 2 was almost 1.4 times as high as pure MnFe 2 O 4 was ascribed to the synergic effect and interfacial interaction across MnFe 2 O 4 nanoparticle (NP) and ZrO 2 that leads to separation of electron-hole pairs efficiently and broadened light absorption of the composite (2.42 eV) compared to MnFe 2 O 4 (2.15 eV). The effective optimized parameters such as solution pH of 7, nanocomposite dosage of 60 mg and initial dye concentration of 20 ppm were studied on photocatalytic performance for the removal of MB dye. The magnetically separable MnFe 2 O 4 / ZrO 2 nanocomposite proved to be highly active and a stable catalyst in five successive photodecolourization cycles for an aqueous solution of MB dye under sunlight irradiation. Furthermore, the possible sunlight photocatalytic mechanism of the MnFe 2 O 4 /ZrO 2 nanocomposite was proposed. Due to its enhancement in photocatalytic activity, this NC has great potential towards the environmental remediation for practical photocatalytic application towards wastewater treatment.

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Magnetic and Catalytic Properties of Cu x Fe1−x Fe2O4 Nanoparticles

Cited by 22 publications

References 27 publications

Gadolinium‐Doped Iron Oxide Nanoprobe as Multifunctional Bioimaging Agent and Drug Delivery System

Gadolinium‐Doped Iron Oxide Nanoprobe as Multifunctional Bioimaging Agent and Drug Delivery System

Electromagnetic Properties and Humidity-Sensing Studies of Magnetically Recoverable LaMg x Fe1−x O 3−δ Perovskites Nano-photocatalysts by Sol-Gel Route

MnFe2O4/ZrO2 nanocomposite as an efficient magnetically separable photocatalyst with good response to sunlight: preparation, characterization and catalytic mechanism

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