Efficient radioactive gas detection by scintillating porous metal–organic frameworks - Archive ouverte HAL Access content directly
Journal Articles Nature Photonics Year : 2023

Efficient radioactive gas detection by scintillating porous metal–organic frameworks

Christophe Dujardin
Pavlo Mai
  • Function : Author

Abstract

Natural and anthropogenic gas radionuclides such as radon, xenon, hydrogen and krypton isotopes must be monitored to be managed as pathogenic agents, radioactive diagnostic agents or nuclear activity indicators. State-of-the-art detectors based on liquid scintillators suffer from laborious preparation and limited solubility for gases, which affect the accuracy of the measurements. The actual challenge is to find solid scintillating materials simultaneously capable of concentrating radioactive gases and efficiently producing visible light revealed with high sensitivity. The high porosity, combined with the use of scintillating building blocks in metal–organic frameworks (MOFs), offers the possibility to satisfy these requisites. We demonstrate the capability of a hafnium-based MOF incorporating dicarboxy-9,10-diphenylanthracene as a scintillating conjugated ligand to detect gas radionuclides. Metal–organic frameworks show fast scintillation, a fluorescence yield of ∼40%, and accessible porosity suitable for hosting noble gas atoms and ions. Adsorption and detection of 85Kr, 222Rn and 3H radionuclides are explored through a newly developed device that is based on a time coincidence technique. Metal–organic framework crystalline powder demonstrated an improved sensitivity, showing a linear response down to a radioactivity value below 1 kBq m−3 for 85Kr, which outperforms commercial devices. These results support the possible use of scintillating porous MOFs to fabricate sensitive detectors of natural and anthropogenic radionuclides.
Fichier principal
Vignette du fichier
porous scint_Hf_MOF_SI_final_submitted.pdf (5.77 Mo) Télécharger le fichier Fichier principal
Vignette du fichier
porous scint_Hf_MOF_manus_final_submitted.pdf (1.81 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Origin : Files produced by the author(s)

Dates and versions

cea-04107631 , version 1 (26-05-2023)

Identifiers

Cite

M. Orfano, J. Perego, F. Cova, C.X. Bezuidenhout, S. Piva, et al.. Efficient radioactive gas detection by scintillating porous metal–organic frameworks. Nature Photonics, 2023, 17, pp.672-678. ⟨10.1038/s41566-023-01211-2⟩. ⟨cea-04107631⟩
23 View
6 Download

Altmetric

Share

Gmail Facebook X LinkedIn More