Issue 13, 2024

Uncovering thermally activated purple-to-blue luminescence in Co-modified MgAl-layered double hydroxide

Abstract

Thermally activated blue-to-purple luminescence of Co-modified nano-sandrose MgAl-layered double hydroxides (LDHs) is concentration dependent, occurring only for MgCoAl-LDH with a molar metal cation concentration of 15% Co. Temperature sweep luminescence spectroscopy between 83 K and 298 K shows that the luminescence is strongest at room temperature, increasing with an activation energy of 1 kJ mol−1 between these temperatures. The luminescence occurs in a broad, but fine-structured band below the conduction band (CB) edge at 3.0 eV after excitation at 5.0 eV.

Graphical abstract: Uncovering thermally activated purple-to-blue luminescence in Co-modified MgAl-layered double hydroxide

Supplementary files

Article information

Article type
Communication
Submitted
15 okt. 2023
Accepted
22 feb. 2024
First published
04 mar. 2024
This article is Open Access
Creative Commons BY-NC license

Nanoscale, 2024,16, 6449-6454

Uncovering thermally activated purple-to-blue luminescence in Co-modified MgAl-layered double hydroxide

B. R. Gevers, E. Roduner, A. Leuteritz and F. J. W. J. Labuschagné, Nanoscale, 2024, 16, 6449 DOI: 10.1039/D3NR05205B

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