skip to main content

Title: Unique properties of α-NaFeO{sub 2}: De-intercalation of sodium via hydrolysis and the intercalation of guest molecules into the extract solution

Graphical abstract: - Highlights: • Facile de-intercalating Na from NaFeO2. • Formation of layered sodium hydrogen carbonate hydrate. • Intercalation chemistry on layered sodium hydrogen carbonate hydrate. - Abstract: We report on a versatile method for the de-intercalation of Na from α-NaFeO{sub 2} by using water to produce α-Na{sub 1−x}FeO{sub 2}, where x ≈ 1. This de-intercalation technique provides an excellent route to ion exchange Na with other metal ions in α-NaFeO{sub 2}. The hydrolysis mechanism is provided. We show that the extracted solution captures CO{sub 2} from the atmosphere leading to the formation of sodium hydrogen carbonate hydrate crystals. The lamellar structure of the hydrate crystals was confirmed by powder X-ray diffraction, and were found Na-deficient via elemental analysis. Intercalation of guest molecules such as polymers, alcohols, and inorganic ions into the gallery space of the newly formed sodium hydrogen carbonate hydrate crystals was demonstrated by the use of powder X-ray diffraction technique. The reported materials were also characterized by Mössbauer spectroscopy, thermogravimetric analysis, differential scanning calorimetry, infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy.
Authors:
;
Publication Date:
OSTI Identifier:
22290480
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 7; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; CARBON DIOXIDE; CLATHRATES; CRYSTALS; HYDROGEN; HYDROLYSIS; INFRARED SPECTRA; IRON OXIDES; SODIUM; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY