Application of photoluminescence microspectroscopy: a study on transfer of uranyl and europium ions on dry silica gel plate

When water contacts with porous materials, water and chemical species dissolved in the water transfer into the inside of the porous materials. Here, to study the transfer of uranyl and europium ions on a dry silica gel plate, we dropped a small amount of aqueous solution (~0.5 μL) dissolving the two...

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Bibliographic Details
Published in:Journal of nuclear science and technology 2020-09, Vol.57 (9), p.1046-1050
Main Authors: Kusaka, Ryoji, Watanabe, Masayuki
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
coexistence effect
Europium
ion transfer
Microscopy
Photoluminescence
Porous materials
Silica gel
Silicon dioxide
spectroscopy
Uranium
uranyl
water penetration
Water transfer
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Summary:When water contacts with porous materials, water and chemical species dissolved in the water transfer into the inside of the porous materials. Here, to study the transfer of uranyl and europium ions on a dry silica gel plate, we dropped a small amount of aqueous solution (~0.5 μL) dissolving the two ions on a dry silica gel plate, and the distributions of the two ions spread on the silica gel plate were observed by photoluminescence microspectroscopy. Photoluminescence images of uranyl and europium ions clearly show that when uranyl ion coexists in the solution, europium ion transfers in a larger area compared to uranyl ion. It can be interpreted that the larger-area distribution of europium ion is caused because uranyl ion is preferentially adsorbed to silica gel and the uranyl adsorption disturbs the adsorption of europium ion. The coexistence of uranyl ion may influence the mobility of other ion species.
ISSN:0022-3131
1881-1248
DOI:10.1080/00223131.2020.1755734