Preparation, characterization, magnetic property, and Mössbauer spectra of the β-FeOOH nanoparticles modified by nonionic surfactant

Yang, Yuxiang; Liu, M.L.; Zhu, Hong; Chen, Y.R.; Mu, Guangyu; Liu, X.N.; Jia, Yu

doi:10.1016/j.jmmm.2008.05.038

Cited by 23 publications

(11 citation statements)

References 9 publications

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“…A maximum blocking temperature of 14 K was observed in the ZFC curve. 63 − 65 A slight inflection point was observed at about 45 K on the FC curve (inset, Figure 10 a) which indicates the antiferromagnetic ordering temperature, T N . 66 − 68 The value of T N for β-FeOOH nanorods is lower than the bulk (270–299 K) and is usually attributed to the finite size and surface properties of materials.…”

Section: Resultsmentioning

confidence: 99%

“…At the nanoscale, the size, shape, and synthetic procedure of nanomaterials can affect the ordering temperature. 65 , 69 The ZFC magnetization versus temperature curve ( Figure 10 b) of Fe 3 O 4 shows a change in magnetization at 120 K, which is called a Verwey transition. 70 This is due to the structural change from cubic to monoclinic phase that occurs around 120 K and which is characteristic of stoichiometrically pure magnetite nanorods.…”

Section: Resultsmentioning

confidence: 99%

“…The β-FeOOH nanoneedles are antiferromagnetic as demonstrated by the magnetic susceptibility (χ) versus temperature ( T ) curve typical of antiferromagnets shown in Figure a. A maximum blocking temperature of 14 K was observed in the ZFC curve. − A slight inflection point was observed at about 45 K on the FC curve (inset, Figure a) which indicates the antiferromagnetic ordering temperature, T N . − The value of T N for β-FeOOH nanorods is lower than the bulk (270–299 K) and is usually attributed to the finite size and surface properties of materials. At the nanoscale, the size, shape, and synthetic procedure of nanomaterials can affect the ordering temperature. , The ZFC magnetization versus temperature curve (Figure b) of Fe 3 O 4 shows a change in magnetization at 120 K, which is called a Verwey transition .…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of Magnetite Nanorods from the Reduction of Iron Oxy-Hydroxide with Hydrazine

et al. 2020

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Nanowires and nanorods of magnetite (Fe 3 O 4 ) are of interest due to their varied biological applications but most importantly for their use as magnetic resonance imaging contrast agents. One-dimensional (1D) structures of magnetite, however, are more challenging to synthesize because the surface energy favors the formation of isotropic structures. Synthetic protocols can be dichotomous, producing either the 1D structure or the magnetite phase but not both. Here, superparamagnetic Fe 3 O 4 nanorods were prepared in solution by the reduction of iron oxy-hydroxide (β-FeOOH) nanoneedles with hydrazine (N 2 H 4 ). The amount of hydrazine and the reaction time affected the phase and morphology of the resulting iron oxide nanoparticles. One-dimensional nanostructures of Fe 3 O 4 could be produced consistently from various aspect ratios of β-FeOOH nanoneedles, although the length of the template was not retained. Fe 3 O 4 nanorods were characterized by transmission electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, and SQUID magnetometry.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Synthesis of Magnetite Nanorods from the Reduction of Iron Oxy-Hydroxide with Hydrazine

et al. 2020

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“…Synthesizing methods include size reduction (top down approach), chemical coprecipitation, sol-gel method, hydrothermal synthesis microemulsion, laser evaporation techniques, laser evaporation techniques (bottom up approach), and biomineralization processes [61,65]. Ubiquitously used magnetic materials involve iron, cobalt, nickel, and its oxides (magnetite, maghemite, chromium dioxide, and cobalt ferrite) [66]. Several studies have been conducted to assess the suitability of using magnetic nanoparticles in F − removal [67][68][69].…”

Section: Magnetic Nanoparticlesmentioning

confidence: 99%

Fluoride in Drinking Water and Nanotechnological Approaches for Eliminating Excess Fluoride

Premathilaka

Liyanagedera

2019

Journal of Nanotechnology

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Arising awareness of health hazards due to long-term exposure of fluoride has led researchers to seek for more innovative strategies to eliminate excess fluoride in drinking water. Fluoride-bearing chemicals in both natural and anthropogenic sources contaminate drinking water, which mainly cause for human fluoride ingestion. Hence, developing sustainable approaches toward alleviation is essential. Among many emerging techniques of defluoridation, nanotechnological approaches stand out owing to its high efficiency, and hence, as in many areas, nanotechnology for excess fluoride removal in water is gaining ground compared to other conventional adsorbents and process. The present review focuses on some of the advanced and recent nanoadsorbents including their strengths and shortcomings (e.g., CNT, LDH, graphene-based nanomaterials, and magnetic nanomaterials) and other processes involving nanotechnology while discussing basic aspects of hydrochemistry of fluoride and geological conditions leading for water fluoride contamination. Considering all the findings in survey, it is evident that developing more sustainable techniques is essential rather than conducting batch-type experiments solely.

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“…Since the catalyst surface is acidic, the adsorption capability of DOX onto catalyst increases and so • OH radicals attack the adsorbed DOX molecules more and the process efficiency increases. H 2 O 2 is an electron scavenger which accepts photogenerated electrons from the conduction band and prevents the electron-hole recombination to generate hydroxyl radicals ( • OH) [14]. The photo-catalytic degradation of DOX was performed at different concentrations of hydrogen peroxide and in the presence of an optimized amount of other laboratory factors.…”

Section: Photocatalytic Degradation Investigation Of Doxmentioning

confidence: 99%

Preparation, Characterization, and Evaluation of the Photocatalytic Effect of α-Fe<sub>2</sub>O<sub>3</sub>/SAPO-34 in the Elimination Process of the Anti-Cancer Drug Doxorubicin from Aqueous Solution

Bigtan¹,

Mahanpoor²

2017

Studia UBB Chemia

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ABSTRACT. In this investigation, α-Fe2O3/SAPO-34 nano-structure were synthesized and characterized by XRD, SEM and FT-IR techniques. Morphologically, the shape of α-Fe2O3/SAPO-34 nanoparticles is close to spherical nanoparticles with an average particle size of 93 nm determined by Debye-Scherrer equation. The photocatalytic activity of α-Fe2O3/SAPO-34 nano-structure was investigated through the degradation of doxorubicin, an anti-cancer drug using a batch reactor under UV-C irradiation and H2O2 as oxidant. The effect of various factors including drug concentration, catalyst dosage, pH and H2O2 concentration on the degradation yield were investigated. The results showed that optimum conditions were: Initial concentration of DOX = 20 ppm, pH = 8, amount of α-Fe2O3/SAPO-34 = 150 mg/L, and H2O2 concentration 4 mol/L.

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Preparation, characterization, magnetic property, and Mössbauer spectra of the β-FeOOH nanoparticles modified by nonionic surfactant

Cited by 23 publications

References 9 publications

Synthesis of Magnetite Nanorods from the Reduction of Iron Oxy-Hydroxide with Hydrazine

Synthesis of Magnetite Nanorods from the Reduction of Iron Oxy-Hydroxide with Hydrazine

Fluoride in Drinking Water and Nanotechnological Approaches for Eliminating Excess Fluoride

Preparation, Characterization, and Evaluation of the Photocatalytic Effect of α-Fe<sub>2</sub>O<sub>3</sub>/SAPO-34 in the Elimination Process of the Anti-Cancer Drug Doxorubicin from Aqueous Solution

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