Fe3O4 nanoparticles show different dispersive states in acidic and alkaline solutions for the two distinct forms of surface bi... ... Amongst the available supports, magnetic materials have...

2023年11月17日 · In this report, we have used the DFT + U + V approach, an extension of the DFT + U approach that takes into account both on-site and intersite interactions, to simulate structural, magnetic, and electronic properties together with the Fe and O K-edge XAS spectra of Fe 3 O 4 above the Verwey temperature (Tv).

2024年10月28日 · Fe 3 O 4, an oxidized form of Fe, is an attractive catalyst for photoelectrochemical (PEC) water-splitting due to its strong light absorption, excellent electrical conductivity, and chemical stability. However, exsolving Fe is challenging, often requiring harsh reduction conditions that can decompose the perovskite.

2021年10月1日 · In situ TEM annealing revealed a unique mechanism of FePt/BN core–shell structure formation. According to MD bimetallic FePt nanoparticles formation can be induced by Pt atoms diffusion toward the surface of Fe@Pt core–shell system. Hexagonal boron nitride (h -BN) nanosheets are a promising material for various applications including catalysis.

According to FFT analysis of submicron isotropic particles (Figure 5d), these relate to Fe 3 O 4 to confirm interplanar spacings of 2.4, 2.5, 2.1, 4.8, and 2.9 Å corresponding to (222), (311 ...

2024年7月24日 · 为了研究从Fe3O4 nanocubes到Fe3O4@χ-Fe5C2 nanocubes的演化过程，作者选择合成气处理不同时间的样品进行HAADF-STEM和XRD表征(图2a)。Fe3O4 nanocubes经过氢气还原形成Fe nanocubes后(图2b和c)，引入合成气对样品进行处理，Fe nanocubes会在碳化学势的驱动下进行碳化。

The high-resolution transmission electron microscopy (HRTEM) image (Fig. 1b) suggests the crystalline nature of Fe3O4 nanoparticles with a clearly resolved lattice spacing of around 0.483 nm, corresponding to that of (111) of inverse spinel Fe3O4 crystal.

Download scientific diagram | TEM (a) and corresponding FFT (b) images of a single FeO@Fe3O4 core–shell nanoparticles taken at t 0. From (b) the particle is oriented along the [110] direction,...

2015年3月15日 · Self-consistent ab initio calculations, based on density functional theory (DFT) approach and using a full potential linear augmented plane wave (FLAPW) method, are performed to investigate both electronic and magnetic properties of the Fe3 O 4.

2025年3月1日 · The crystallography analysis by Fast Fourier Transform (FFT) lets to identify the (2 2 ¯ 0), 400 and (220) planes related to 0.299 nm, 0.198 nm and 0.296 nm interplanar distances, respectively, confirming the presence of Fe 3 O 4.