Synthesis and characterization of maghemite iron oxide (γ-Fe2O3) nanofibers: novel semiconductor with magnetic feature

Barakat, Nasser A.M.

doi:10.1007/s10853-012-6543-7

Cited by 36 publications

(12 citation statements)

References 46 publications

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“…The XRD spectra of three kinds of the magnetic particles were showed in Fig [19][20][21][22][23]. In order to confirm further the production of LTLV, it was also tested by RS method.…”

Section: Phase Composition Of the Magnetic Particlesmentioning

confidence: 99%

Effects of γ-Fe2O3 on γ-Fe2O3/Fe3O4 composite magnetic fluid by low-temperature low-vacuum oxidation method

et al. 2016

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“…The XRD spectra of three kinds of the magnetic particles were showed in Fig [19][20][21][22][23]. In order to confirm further the production of LTLV, it was also tested by RS method.…”

Section: Phase Composition Of the Magnetic Particlesmentioning

confidence: 99%

Effects of γ-Fe2O3 on γ-Fe2O3/Fe3O4 composite magnetic fluid by low-temperature low-vacuum oxidation method

et al. 2016

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“…Magnetite can be semi-conductive in certain conditions with a small bandgap of the order of 0.1 eV [ 110 , 111 , 112 ]. In addition, the semiconducting property of maghemite detected in carbon steel samples exposed to each of the fruit juices is well known [ 113 , 114 ]. Surface oxides present on corroding metal surfaces are known to influence corrosion processes particularly when they are semiconducting [ 115 ].…”

Section: Resultsmentioning

confidence: 99%

Comparative Gravimetric Studies on Carbon Steel Corrosion in Selected Fruit Juices and Acidic Chloride Media (HCl) at Different pH

Ofoegbu

2021

Materials

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Food contamination due to metal corrosion and the consequent leakage of metals into foods is a problem. Understanding the mechanism(s) of metal corrosion in food media is vital to evaluating, mitigating, and predicting contamination levels. Fruit juices have been employed as model corrosive media to study the corrosion behaviour of metallic material in food media. Carbon steel corrosion in fresh juices of tomato, orange, pineapple, and lemon, as well as dilute hydrochloric acid solutions at varied pH, was studied using scanning electron microscopy, gravimetric and spectrophotometric techniques, and comparisons made between the corrosivity of these juices and mineral acids of comparable pH. The corrosion of carbon steel in fruit juices and HCl solutions manifests as a combination of uniform and pitting corrosion. Gravimetric data acquired after one hour of immersion at ambient temperature (22 °C) indicated corrosion rates of 0.86 mm yr−1 in tomato juice (pH ≈ 4.24), 1.81 mm yr−1 in pineapple juice (pH ≈ 3.94), 1.52 mm yr−1 in orange juice (pH ≈ 3.58), and 2.89 mm yr−1 in lemon juice (pH ≈ 2.22), compared to 2.19 mm yr−1 in 10−2 M HCl (pH ≈ 2.04), 0.38 mm yr−1 in 10−3 M HCl (pH ≈ 2.95), 0.17 mm yr−1 in 10−4 M HCl (pH ≈ 3.95), and 0.04 mm yr−1 in 10−5 M HCl (pH ≈ 4.98). The correlation of gravimetrically acquired corrosion data with post-exposure spectrophotometric analysis of fruit juices enabled de-convolution of iron contamination rates from carbon steel corrosion rates in fruit juices. Elemental iron contamination after 50 h of exposure to steel samples was much less than the values predicted from corrosion data (≈40%, 4.02%, 8.37%, and 9.55% for tomato, pineapple, orange, and lemon juices, respectively, relative to expected values from corrosion (weight loss) data). Tomato juice (pH ≈ 4.24) was the least corrosive to carbon steel compared to orange juice (pH ≈ 3.58) and pineapple juice (pH ≈ 3.94). The results confirm that though the fruit juices are acidic, they are generally much less corrosive to carbon steel compared to hydrochloric acid solutions of comparable pH. Differences in the corrosion behaviour of carbon steel in the juices and in the different mineral acid solutions are attributed to differences in the compositions and pH of the test media, the nature of the corrosion products formed, and their dissolution kinetics in the respective media. The observation of corrosion products (iron oxide/hydroxide) in some of the fruit juices (tomato, pineapple, and lemon juices) in the form of apparently hollow microspheres indicates the feasibility of using fruit juices and related wastes as “green solutions” for the room-temperature and hydrothermal synthesis of metal oxide/hydroxide particles.

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“…Sodium borohydride was then added to the mats to reduce the ferric ions to IONPs. Another example of post‐treatment nanocomposite fabrication is the work of Barakat who prepared nanofibers from a solution of PVA and Iron(II) acetate (FeAc) . The nanofiber mats were dried for 24 h before undergoing calcination at 700°C for 5 h in an argon atmosphere to form IONPs.…”

Section: Nanoparticle‐nanofiber Composite Fabricationmentioning

confidence: 99%

The fabrication of iron oxide nanoparticle‐nanofiber composites by electrospinning and their applications in tissue engineering

Mortimer

Wright

2017

Biotechnology Journal

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This paper reviews the use of iron oxide nanoparticle-nanofiber composites in tissue engineering with a focus on the electrospinning technique. Electrospinning is an established method of scaffold fabrication offering a number of key advantages which include its facile nature, with electrospun materials offering a high surface area to volume ratio, potential for the release of drugs and antimicrobials, controllable fiber diameters and high porosity and permeability. A number of different techniques for the preparation of iron oxide nanoparticles including their functionalization are discussed along with their applications in the biomedical field. The review then focusses on the fabrication of nanoparticle-nanofiber composite scaffolds formed using electrospinning. The advantages and disadvantages of current fabrication techniques are discussed including the fabrication of nanofibers using pre-synthesized nanoparticles and post-treatment synthesized nanoparticles. We demonstrate that emerging in-situ synthesis techniques show promise by offering a reduced number of steps and simpler procedures for the production of magnetic scaffolds. These scaffolds have a number of applications in tissue engineering, allowing for improved bone and tissue repair.

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Synthesis and characterization of maghemite iron oxide (γ-Fe2O3) nanofibers: novel semiconductor with magnetic feature

Cited by 36 publications

References 46 publications

Effects of γ-Fe2O3 on γ-Fe2O3/Fe3O4 composite magnetic fluid by low-temperature low-vacuum oxidation method

Effects of γ-Fe2O3 on γ-Fe2O3/Fe3O4 composite magnetic fluid by low-temperature low-vacuum oxidation method

Comparative Gravimetric Studies on Carbon Steel Corrosion in Selected Fruit Juices and Acidic Chloride Media (HCl) at Different pH

The fabrication of iron oxide nanoparticle‐nanofiber composites by electrospinning and their applications in tissue engineering

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