Improvement of luminescent properties of GdPO4 doped with optimal europium concentration by Co-doping with lanthanum. Issue 2 (15th January 2023)

• Record Type: Journal Article
• Authors: Budrevičius, D.; Kajimoto, N.; Pakalniškis, A.; Tsuru, K.; Kareiva, A.; Skaudžius, R.
• Is Part Of: Ceramics international. Volume 49:Issue 2(2023)
• Page Start: 2373
• Page End: 2379
• Publication Date: 2023-01-15
• Subjects: B. Electron microscopy -- B. X-ray methods -- C. Optical properties -- E. Biomedical applications; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.09.209
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Hexagonal gadolinium Phosphate Hydrate doped with different europium amounts (Gd1-x PO4 :Eux ·H2 O; x = 0.01, 0.05, 0.10, 0.15, and 0.20) was synthesized by hydrothermal synthesis method and the obtained samples were analyzed giving the optimal dopant concentration. Furthermore, gadolinium was additionally replaced by Lanthanum Gd0.85-y Lay PO4 :15%Eu (y = 0.25, 0.5, 0.75) in hopes of improving luminescence properties even more. This may be possible due to the fact that LaPO4 exhibits a monoclinic crystal structure, which usually shows better luminescence properties. All of the synthesized compounds were analyzed by X-ray diffraction in order to investigate their crystal structure. SEM analysis was used to characterize the morphology of synthesized particles, while surface area and the pore size of Gd0.85-x Lax PO4 :15%Eu samples were measured using Nitrogen adsorption by the BET method and BJH method. The luminescence properties were also characterized and discussed in detail. Lastly, the cytotoxicity study demonstrated that the replacement of gadolinium with lanthanum leads to a reduction in the toxicity of the samples.