Effects of synthesis method on cation distribution and optical properties of Co/Cr co-doped MgGa2O4 nanoparticles

Liu, Jian; Duan, Xiulan; Li, Nannan; Jiang, Huaidong

doi:10.1016/j.jallcom.2015.03.229

Cited by 14 publications

(4 citation statements)

References 26 publications

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“…It is known that the magnetocrystalline anisotropy of cobalt ferrite is mainly ascribed to the incompletely quenched orbital momentum of Co 2+ at B sites 29 , so the migration of Co 2+ from B sites to A sites will incur the decrease of magnetocrystalline anisotropy and the decrease of coercivity. The migration of Co 2+ from B sites to A sites caused by calcination is reported in literature 30 . Wang et al .…”

Section: Resultsmentioning

confidence: 98%

The heating efficiency of magnetic nanoparticles under an alternating magnetic field

Yang

et al. 2022

Sci Rep

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Hysteresis loss and relaxation loss are the two dominant heating mechanisms of magnetic nanoparticles (MNPs) in an alternating magnetic field (AMF). In magnetic induction hyperthermia, heating efficiency is one of the crucial factors. It is proposed that the MNPs with a dominant heating mechanism of relaxation loss will exhibit a higher heating efficiency. However, the relative experiments supporting the proposal is still absent due to the difficulty of obtaining the MNPs with the same components and similar morphology but different dominant heating mechanism. Here, the post-processing method of calcination is employed to change the cation distribution of the MNPs (Fe3O4 and Zn0.54Co0.46Cr0.6Fe1.4O4), so as to obtain the MNPs with similar morphology but different dominant heating mechanism. The magnetic heating experiments were conducted to examine the heating efficiency. The results suggest that the MNPs with relaxation loss have a higher heating efficiency under the investigated AMF.

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Section: Resultsmentioning

confidence: 98%

The heating efficiency of magnetic nanoparticles under an alternating magnetic field

Yang

et al. 2022

Sci Rep

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“…The binding energy data are listed in Table 2 . The peaks at 1302.6 eV and 1302.2 eV were attributed to Mg ions at octahedral and tetrahedral positions, respectively [ 25 , 26 , 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…The binding energy data are listed in Table 2. The peaks at 1302.6 eV and 1302.2 eV were attributed to Mg ions at octahedral and tetrahedral positions, respectively [25][26][27]. The change of cation distribution in the microstructure of the material led to lattice distortion, which had a macro effect on the properties of the material.…”

Section: Xps Studiesmentioning

confidence: 99%

Synthesis, Electronic Structure, and Electrochemical Properties of the Cubic Mg2MnO4 Spinel with Porous-Spongy Structure

Wang

Zhu

et al. 2021

Nanomaterials

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Mg2MnO4 nanoparticles with cubic spinel structure were synthesized by the sol-gel method using polyvinyl alcohol (PVA) as a chelating agent. X-ray powder diffraction, infrared spectrum (IR), scanning electron microscope (SEM), and transmission electron microscope (TEM) were used to characterize the crystalline phase and particle size of as-synthesized nanoparticles. The electronic structure of Mg2MnO4 spinel was studied by X-ray photoelectron spectroscopy (XPS). The results showed that pure cubic Mg2MnO4 spinel nanoparticles were obtained when the annealing temperature was 500–700 °C. The samples had a porous-spongy structure assembled by nanoparticles. XPS studies indicated that Mg2MnO4 nanoparticles were mixed spinel structures and the degree of cation inversion decreased with increasing annealing temperature. Furthermore, the performance of Mg2MnO4 as lithium anode material was studied. The results showed that Mg2MnO4 samples had good cycle stability except for the slight decay in the capacity at 50 cycles. The coulombic efficiency (ratio of discharge and charge capacity) in most cycles was near 100%. The sample annealed at 600 °C exhibited good electrochemical properties, the first discharge capacity was 771.5 mAh/g, and the capacity remained 340 mAh/g after 100 cycles. The effect of calcination temperature on the charge–discharge performance of the samples was studied and discussed.

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“…The peak at 381.6 cm −1 corresponds to the A 1g(S-W-Se) vibrational mode [15]. The chemical composition of WS 1.08 Se 0.92 was determined by the element sensitivity factor method of XPS [47]. The total XPS spectrum of WS 1.08 Se 0.92 is shown in figure 1(c).…”

Section: Characterizationmentioning

confidence: 99%

Broadband high-performance vertical WS_1.08Se_0.92/Si heterojunction photodetector with MXene electrode

Xiong,

Chen,

Feng

2023

Nanotechnology

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Vertical semiconductor van der Waals heterojunctions are essential for fabricating high-performance photodetectors. However, the range of the spectral response and defect states of semiconductor materials are two critical factors affecting the performance of photodetectors. In this work, the spectral response range of WS2 was changed through WS2 band gap regulation, and a self-powered vertical WS1.08Se0.92 /Si heterojunction photodetector with MXene electrode was prepared by synthesizing WS1.08Se0.92 film on Si substrate and vertically stacking Ti3C2Tx MXene on the film. Due to the electron collection of MXene and the wonderful junction quality of WS1.08Se0.92/Si, the photodetector can detect near-infrared light in the range of 980-1310 nm, which exceed the detection limit of WS1.08Se0.92. And the device had high sensitivity in the broadband. The responsivity was 4.58 A/W, the specific detectivity was 4.58×1011 Jones, the on/off ratio was 4.95×103, and the fast response time was 9.81/ 9.03 μs. These properties are superior to previously reported WS2-based photodetectors. Vertical structure, Energy band tuning, and MXene electrode provide a new idea for preparing broadband high-performance and self-powered photodetector.

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Effects of synthesis method on cation distribution and optical properties of Co/Cr co-doped MgGa2O4 nanoparticles

Cited by 14 publications

References 26 publications

The heating efficiency of magnetic nanoparticles under an alternating magnetic field

The heating efficiency of magnetic nanoparticles under an alternating magnetic field

Synthesis, Electronic Structure, and Electrochemical Properties of the Cubic Mg2MnO4 Spinel with Porous-Spongy Structure

Broadband high-performance vertical WS_1.08Se_0.92/Si heterojunction photodetector with MXene electrode

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Effects of synthesis method on cation distribution and optical properties of Co/Cr co-doped MgGa2O4 nanoparticles

Cited by 14 publications

References 26 publications

The heating efficiency of magnetic nanoparticles under an alternating magnetic field

The heating efficiency of magnetic nanoparticles under an alternating magnetic field

Synthesis, Electronic Structure, and Electrochemical Properties of the Cubic Mg2MnO4 Spinel with Porous-Spongy Structure

Broadband high-performance vertical WS1.08Se0.92/Si heterojunction photodetector with MXene electrode

Contact Info

Product

Resources

About

Broadband high-performance vertical WS_1.08Se_0.92/Si heterojunction photodetector with MXene electrode