Strain-induced phase-structure of Fe2O3 nanoparticles

Zhou, Hang; Yuan, Cailei; An, Zhiwei; Xu, Keng; Yu, Ting; Luo, Xingfang

doi:10.1016/j.jallcom.2018.01.286

Cited by 7 publications

(4 citation statements)

References 26 publications

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“…Three peaks located at 216.3, 281.8, and 598.2 cm −1 are observed, which are assigned to the A 1g , E g , and E g modes of α-Fe 2 O 3 , respectively. 35,36 Furthermore, the first-order Raman modes (A 1g ) and second-order Raman scattering (2LA(M)) of MoS 2 , which are located at 393.1 and 478.0 cm −1 , respectively, are also observed. On the other hand, two broad characteristic peaks at around 1300 and 1560 cm −1 are observed, which can be ascribed to the D and G bands of carbon, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 87%

“…Figure S7 shows the Raman spectra of Fe 2 O 3 @MoS 2 /C. Three peaks located at 216.3, 281.8, and 598.2 cm –1 are observed, which are assigned to the A 1g , E g , and E g modes of α-Fe 2 O 3 , respectively. , Furthermore, the first-order Raman modes (A 1g ) and second-order Raman scattering (2LA(M)) of MoS 2 , which are located at 393.1 and 478.0 cm –1 , respectively, are also observed. On the other hand, two broad characteristic peaks at around 1300 and 1560 cm –1 are observed, which can be ascribed to the D and G bands of carbon, respectively. ,, The contents of Fe 2 O 3 , MoS 2 , and C in the Fe 2 O 3 @MoS 2 /C composite were determined by thermogravimetric analysis (TGA) and inductively coupled plasma (ICP) spectroscopy.…”

Section: Resultsmentioning

confidence: 97%

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Hierarchical Fe₂O₃@MoS₂/C Nanorods as Anode Materials for Sodium Ion Batteries with High Cycle Stability

Cui

Tan

Liu

et al. 2021

ACS Appl. Energy Mater.

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Constructing multicomponent hybrid materials is a common and effective method to achieve high-performance anode materials for sodium ion batteries (SIBs). In this work, hierarchical nanorods composed of ultrathin MoS2/C nanosheets and hollow Fe2O3 nanorods as SIB anode materials are designed and reported. Through a simple and two-step hydrothermal method, ultrathin MoS2/C nanosheets are grown on hollow Fe2O3 nanorods to realize the Fe2O3@MoS2/C configuration. Benefiting from the synergic effects of Fe2O3 nanorods and ultrathin MoS2/C nanosheets, which can shorten the diffusion path of electrons/Na+ ions and enhance the electrical conductivity of the hybrids, the volume change of the electrode is avoided during the sodiation/desodiation process. Furthermore, MoS2/C nanosheets can offer more Na+ storage active sites, which lead to high sodium storage capacity. Accordingly, when the Fe2O3@MoS2/C composite is assessed as an SIB anode material, it delivers an excellent electrochemical performance, including ultrastable cyclability (379.2 mAh g–1 is maintained after 2000 cycles) and excellent rate capability (339.0 mAh g–1 at 5.0 A g–1).

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Section: ■ Results and Discussionmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 97%

Hierarchical Fe₂O₃@MoS₂/C Nanorods as Anode Materials for Sodium Ion Batteries with High Cycle Stability

Cui

Tan

Liu

et al. 2021

ACS Appl. Energy Mater.

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“…Supporting Information for this article can be found under DOI: https://doi.org/10.1002/ceat.202200250. This section includes additional references to primary literature relevant for this research 35–56.…”

Section: Supporting Informationmentioning

confidence: 99%

Spectroscopic Investigation of Carbon Dioxide Interactions with Transition Metal‐Oxide Nanoparticles

Alalwan

Alminshid

Mohammed³

et al. 2022

Chem Eng & Technol

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The interactions of carbon dioxide (CO2) with metal oxides are a significant subject due to the numerous applications in which this reaction is involved. Although this reaction has been extensively studied by various infrared (IR) techniques, only a few (if any) have utilized in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). DRIFTS has an essential advantage over other traditional IR techniques in that it involves minimal sample preparation before analysis. In this work, CO2 adsorption on CoO, CuO, and α‐Fe2O3 nanoparticle surfaces was investigated by using DRIFTS. While the majority of species on CoO and CuO surfaces were observed as carbonate, on α‐Fe2O3 bicarbonate was more prevalent.

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“…Different temperature dependences of the interactions can lead to magnetic phase transitions, in particular, to the Morin transition in hematite. The Morin temperature, magnetic and other physical properties of hematite can be affected strongly by size effects, pressure, lattice strains, random or targeted impurities and so on [7,8,9,10,11]. Such variability in the properties of hematite is one of the reasons why researchers have continued interest in this material.…”

Section: Introductionmentioning

confidence: 99%

Magnetic circular dichroism in the canted antiferromagnet α-Fe2O3: Bulk single crystal and nanocrystals

Ivantsov

Ivanova

Жарков

et al. 2020

Journal of Magnetism and Magnetic Materials

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α-Fe 2 O 3 is a canted antiferromagnetic with a Neel temperature of T N = 960 K and undergoing the Morin transition at 260 K when the sublattice magnetic moments become antiparallel and the resulting magnetic moment disappears. Due to the variety of magnetic properties and a wide range of applications, this material still remains in the top list of the physics of magnetic phenomena. In order to understand the features of magneto-optical effects in α-Fe 2 O 3 we carried out the detail investigation of the optical magnetic circular dichroism (MCD) for the α-Fe 2 O 3 nanoparticles in comparison with the α-Fe 2 O 3 single crystal optical and magneto-optical parameters obtained with the ellipsometric method. Based on the analysis of the MCD spectra measured directly for nanoparticles and calculated from ellipsometric data for single crystal, two types of the features were identified describing by the Gaussian and S-shape lines. Very strong S-shape line observed at 2.0-2.5 eV appeared to be an exceptional feature of α-Fe 2 O 3 distinguishing it from other iron oxide compounds. It is shown that the MCD originates from the weak dd transitions, including, pare exciton-magnon transition, while optical absorption is associated primary with the charge transfer transitions.

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Strain-induced phase-structure of Fe2O3 nanoparticles

Cited by 7 publications

References 26 publications

Hierarchical Fe₂O₃@MoS₂/C Nanorods as Anode Materials for Sodium Ion Batteries with High Cycle Stability

Hierarchical Fe₂O₃@MoS₂/C Nanorods as Anode Materials for Sodium Ion Batteries with High Cycle Stability

Spectroscopic Investigation of Carbon Dioxide Interactions with Transition Metal‐Oxide Nanoparticles

Magnetic circular dichroism in the canted antiferromagnet α-Fe2O3: Bulk single crystal and nanocrystals

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Strain-induced phase-structure of Fe2O3 nanoparticles

Cited by 7 publications

References 26 publications

Hierarchical Fe2O3@MoS2/C Nanorods as Anode Materials for Sodium Ion Batteries with High Cycle Stability

Hierarchical Fe2O3@MoS2/C Nanorods as Anode Materials for Sodium Ion Batteries with High Cycle Stability

Spectroscopic Investigation of Carbon Dioxide Interactions with Transition Metal‐Oxide Nanoparticles

Magnetic circular dichroism in the canted antiferromagnet α-Fe2O3: Bulk single crystal and nanocrystals

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Hierarchical Fe₂O₃@MoS₂/C Nanorods as Anode Materials for Sodium Ion Batteries with High Cycle Stability

Hierarchical Fe₂O₃@MoS₂/C Nanorods as Anode Materials for Sodium Ion Batteries with High Cycle Stability