Facile synthesis of air-stable Prussian white microcubes via a hydrothermal method
- Department of Physics, Center of Functional Nanomaterials and Devices, East China Normal University, Shanghai 200241 (China)
Research highlights: {yields} We have synthesized Prussian white microcubes in large quantities by a facile hydrothermal method for the first time. {yields} It is the first report about air-stable PW. {yields} The shape of crystals strongly depended on the concentration of K{sub 4}[Fe(CN){sub 6}], the hydrothermal temperature and the reaction duration. {yields} A layer-by-layer growth mechanism was proposed to explain the formation of PW microcubes. -- Abstract: Air-stable Prussian white (PW) microcubes were fabricated by the slow dissociation of K{sub 4}[Fe(CN){sub 6}] under hydrothermal condition without the protection of inert atmosphere. Moessbauer spectra and Fourier transform infrared (FT-IR) spectrum were used to characterize the composition of PW. X-ray diffraction (XRD) identified the obtained PW was monoclinic, and the purity was high. Scanning electron microscopy (SEM) images indicated the cubes were composed by solid cubes and hollow cubes. The shape of crystals strongly depended on the concentration of K{sub 4}[Fe(CN){sub 6}], the hydrothermal temperature as well as the reaction duration. The lower concentration and lower temperature resulted in perfect cubic crystals, while the higher concentration or the higher temperature resulted in irregular cubic crystals. After exposing in air for 2 months, no oxidation of PW occurred. To explain the formation of the PW microcubes, a layer-by-layer growth mechanism was put forward based on the low dissociation rate of K{sub 4}[Fe(CN){sub 6}]. The partially solubility of PW in water caused the formation of hollow cubes.
- OSTI ID:
- 22210049
- Journal Information:
- Materials Research Bulletin, Vol. 46, Issue 5; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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