Direct syntheses of La{sub n+1}Ni{sub n}O{sub 3n+1} phases (n=1, 2, 3 and {infinity}) from nanosized co-crystallites
Journal Article
·
· Journal of Solid State Chemistry
- Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ (United Kingdom)
- Centre for Materials Research, School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS (United Kingdom)
- Department of Materials, Imperial College London, South Kensington, London SW7 2AZ (United Kingdom)
A new direct route for the 'bottom up' syntheses of phases in the La{sub n+1}Ni{sub n}O{sub 3n+1} series (n=1, 2, 3 and {infinity}) has been achieved via single-step heat treatments of nanosized co-crystallized precursors. The co-crystallized precursors were prepared using a continuous hydrothermal flow synthesis system that uses a superheated water flow at ca. 400 deg. C and 24.1 MPa to produce nanoparticulate slurries. Overall, a significant reduction in time and number of steps for the syntheses of La{sub 3}Ni{sub 2}O{sub 7} and La{sub 4}Ni{sub 3}O{sub 10} was achieved compared with more conventional synthesis methods, which typically require multiple homogenization and reheating steps over several days. - Graphical abstract: Scanning electron micrograph of La{sub 4}Ni{sub 3}O{sub 10} (bar=1 {mu}m) made by a single heat treatment at 1075 deg. C in air for 12 h of a 4:3 La:Ni ratio co-crystallite mixture of the metal hydroxides.
- OSTI ID:
- 21128290
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 5 Vol. 181; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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