Preparation of superparamagnetic MnxFe1−xO nanoparticles from low-index-facet cubes to high-index-facet concave structures and their catalytic performance in aqueous solution

Lee, Pei-Ying; Teng, His Sheng; Yeh, Chen Sheng

doi:10.1039/c3nr01865b

Cited by 19 publications

(31 citation statements)

References 25 publications

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“…The synthesis of magnetic plasmonic nanostructures with non-platonic geometries is a growing area of interest within this field, as these novel structures have a large surface area, strong NIR (Near Infrared) absorbance, plasmonic hot spots and interesting interactions with cells and cell components [30][31][32]. For example, an Fe 3 O 4 inner core was coated by a smooth layer of gold which then acted as a basis for the growth of the gold spikes to produce star-like Fe 3 O 4 @Au magneto-plasmonic supraparticles ( Figure 4) [33].…”

Section: Synthesis Of Magnetic-plasmonic Nanoparticles Without Intermmentioning

confidence: 99%

Multimodal Magnetic-Plasmonic Nanoparticles for Biomedical Applications

2018

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Magnetic plasmonic nanomaterials are of great interest in the field of biomedicine due to their vast number of potential applications, for example, in molecular imaging, photothermal therapy, magnetic hyperthermia and as drug delivery vehicles. The multimodal nature of these nanoparticles means that they are potentially ideal theranostic agents-i.e., they can be used both as therapeutic and diagnostic tools. This review details progress in the field of magnetic-plasmonic nanomaterials over the past ten years, focusing on significant developments that have been made and outlining the future work that still needs to be done in this fast emerging area. The review describes the main synthetic approaches to each type of magnetic plasmonic nanomaterial and the potential biomedical applications of these hybrid nanomaterials.

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Section: Synthesis Of Magnetic-plasmonic Nanoparticles Without Intermmentioning

confidence: 99%

Multimodal Magnetic-Plasmonic Nanoparticles for Biomedical Applications

2018

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“…In the present work, the catalytic activity of magnesium chromite for the oxidation of Xylenol Orange (XO) dye molecule was examined. The use of semiconducting oxide materials, for the controlled photo catalytic degradation of harmful dye molecules released as effluents from textile industries is emerging as a lucrative way to solve environmental issues . Therefore, degradation of Rhodamine 6G (Rh‐6G) under UV–Visible irradiation using the synthesized MgCr 2 O 4 has been studied.…”

Section: Introductionmentioning

confidence: 99%

“…The use of semiconducting oxide materials, for the controlled photo catalytic degradation of harmful dye molecules released as effluents from textile industries is emerging as a lucrative way to solve environmental issues. 19,20 Therefore, degradation of Rhodamine 6G (Rh-6G) under UV-Visible irradiation using the synthesized MgCr 2 O 4 has been studied. It is noteworthy that trivalent chromium (present in MgCr 2 O 4 ) is less carcinogenic than its hexavalent form.…”

Section: Introductionmentioning

confidence: 99%

Rapid Synthesis of Mesoporous, Nano‐Sized MgCr₂O₄ and Its Catalytic Properties

Tripathi¹,

Nagarajan

2015

J. Am. Ceram. Soc.

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Monophasic MgCr2O4 has been synthesized by calcining the gel formed by the addition of epoxide to an ethanolic solution containing MgCl2·6H2O and CrCl3·6H2O. The sample has been characterized by a variety of analytical techniques including powder X‐ray diffraction (PXRD), FT‐IR, Raman, UV–Visible spectroscopy, transmission electron microscopy, and magnetic measurements at room temperature. Calcining the xerogel at 500°C and 700°C for 2 h yielded MgCr2O4 (yield of almost 61% by weight). BET surface area of 33.95 m2/g with an average pore diameter of 28.45 nm was obtained for the sample after calcination at 700°C. Square facets of the cubic spinel structure were observed in TEM images with an average crystallite diameter of 18 nm. HR‐TEM experiments and SAED measurements confirmed the spinel structure and negated the presence of other phases. The presence of MO4 tetrahedral and MO6 octahedral units in MgCr2O4 has also been evidenced from FTIR and Raman spectra. The sample showed paramagnetic behavior at room temperature with μeff of 3.54 B.M suggesting the presence of Cr in III oxidation state. Its use as an efficient catalyst for the oxidative degradation of Xylenol Orange (XO) and the photo degradation of Rhodamine‐6G (Rh‐6G) dyes have been demonstrated as these dye molecules are environmental pollutants.

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“…Several shapes of Mn x Fe 1-x O nanoparticles were prepared by thermal decomposition method, such as nanospheres, 26 concave shape nanoparticles, 27 nanocubes, 28,29 and hexagonal shape nanoparticles. 30 The advantage of Mn x Fe 1-x O is its resistance to oxidation in air compared to MnO and FeO, which makes it a good candidate for magnetic contrast agent.…”

Section: Introductionmentioning

confidence: 99%

Selective Magnetic Evolution of Mn_xFe_1–xO Nanoplates

2015

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Iron–manganese oxide (Mn x Fe1–x O) nanoplates were prepared by the thermal decomposition method. Irregular development of crystalline phases was observed with the increase of annealing temperature. Magnetic properties are in accordance with their respective crystalline phases, and the selective magnetic evolution from their rich magnetism of Mn x Fe1–x O and MnFe2O4 is achieved by controlling the annealing conditions. Rock-salt structure of Mn x Fe1–x O (space group Fm3̅m) is observed in as-synthesized nanoplates, while MnFe2O4 and Mn x Fe1–x O with significant magnetic interactions between them are observed at 380 °C. In nanoplates annealed at 450 °C, soft ferrites of Mn0.48Fe2.52O4 with Mn x Fe1–x O are observed. It is assumed that the differential and early development of crystalline phase of Mn x Fe1–x O and the inhomogeneous cation mixing between Mn and Fe cause this rather extraordinary magnetic development. In particular, the prone nature of divalent metal oxides to cation vacancy and the prolonged annealing time of 15 h which enables ordering are also thought to contribute to these irregularities.

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Preparation of superparamagnetic MnxFe1−xO nanoparticles from low-index-facet cubes to high-index-facet concave structures and their catalytic performance in aqueous solution

Cited by 19 publications

References 25 publications

Multimodal Magnetic-Plasmonic Nanoparticles for Biomedical Applications

Multimodal Magnetic-Plasmonic Nanoparticles for Biomedical Applications

Rapid Synthesis of Mesoporous, Nano‐Sized MgCr₂O₄ and Its Catalytic Properties

Selective Magnetic Evolution of Mn_xFe_1–xO Nanoplates

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Preparation of superparamagnetic MnxFe1−xO nanoparticles from low-index-facet cubes to high-index-facet concave structures and their catalytic performance in aqueous solution

Cited by 19 publications

References 25 publications

Multimodal Magnetic-Plasmonic Nanoparticles for Biomedical Applications

Multimodal Magnetic-Plasmonic Nanoparticles for Biomedical Applications

Rapid Synthesis of Mesoporous, Nano‐Sized MgCr2O4 and Its Catalytic Properties

Selective Magnetic Evolution of MnxFe1–xO Nanoplates

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Product

Resources

About

Rapid Synthesis of Mesoporous, Nano‐Sized MgCr₂O₄ and Its Catalytic Properties

Selective Magnetic Evolution of Mn_xFe_1–xO Nanoplates