Photobleaching of LnVO4:Eu3+ nanoparticles under UV-light irradiation: Effect of nanoparticle size

Autor:	S. L. Yefimova, K.O. Hubenko, Alexander V. Sorokin, Pavel Maksimchuk, I.I. Bespalova, V. V. Seminko, Ganna Grygorova
Rok vydání:	2022
Předmět:	Electron transfer Materials science Biophysics Nanoparticle Light irradiation General Chemistry Irradiation Condensed Matter Physics Photochemistry Biochemistry Photobleaching Atomic and Molecular Physics and Optics Ion
Zdroj:	Journal of Luminescence. 242:118593
ISSN:	0022-2313
DOI:	10.1016/j.jlumin.2021.118593
Popis:	LnVO4:Eu3+ (Ln = Gd, Y, La) nanoparticles (NPs) of different sizes have been synthesized by citrate and citrate-free routes. NPs of both types reveal photobleaching, i.e. decrease in Eu3+ emission under UV-light irradiation. The efficiency of the photobleaching depends strongly on NPs size. Presented here experimental data show that the photobleaching effect is associated with a photo-reduction of Eu3+ ions to Eu2+ via the electron transfer reaction under UV-light irradiation and cannot be ascribed to V5+ to V4+ ion reduction assisted by citrate ions. The role of the NPs size in Eu3+ photobleaching is analyzed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a0ee657788f04c42ddd6afbe3e35fd25 https://doi.org/10.1016/j.jlumin.2021.118593 Zobrazit plný text záznamu Full Text from ScienceDirect