Jump to main content
Jump to site search


Preparation of 2D α-Fe2O3 platelets via a hydrothermal heterogeneous growth approach and study of their magnetic properties

Author affiliations

Abstract

We report a novel strategy to modify the morphology of hydrothermal α-Fe2O3 particles via a heterogeneous growth process of BaFe12O19 crystal nuclei based on their structural similarity to α-Fe2O3 as well as their excellent crystallization habit to hexaplates. Various (001)-exposed single phase α-Fe2O3 platelets with diameters of 2.23–11.99 μm and thicknesses of 0.24–2.21 μm were successfully prepared without surfactants by using Fe(NO3)3·9H2O and Ba(NO3)2 as starting materials with NaOH as a precipitant in a facile hydrothermal process. The microstructural characterization by XRD, FESEM and EDS indicates that Ba2+ ions play an essential role in directing the formation of α-Fe2O3 platelets by producing BaFe12O19 nuclei as heterogeneous growth cores. This outcome has been supported by a series of experimental results, such as composition and cell parameter changes, morphology evolution, and the generation of double-layer α-Fe2O3 platelets. To facilitate the nucleation of BaFe12O19 while preventing its further growth, an appropriate NaOH concentration and barium-poor stoichiometry were required. Furthermore, the magnetic hysteresis measurements demonstrated that these 2D α-Fe2O3 platelets exhibit strong shape- and orientation-dependent magnetic properties.

Graphical abstract: Preparation of 2D α-Fe2O3 platelets via a hydrothermal heterogeneous growth approach and study of their magnetic properties

Back to tab navigation

Publication details

The article was received on 15 Feb 2017, accepted on 07 Jun 2017 and first published on 07 Jun 2017


Article type: Paper
DOI: 10.1039/C7NJ00547D
Citation: New J. Chem., 2017, Advance Article
  •   Request permissions

    Preparation of 2D α-Fe2O3 platelets via a hydrothermal heterogeneous growth approach and study of their magnetic properties

    L. Cao, Y. Zeng, Z. Ye, Z. Wang, Y. Zhang, L. Zhao, C. Li and C. Zhang, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ00547D

Search articles by author

Spotlight

Advertisements