Pristine and humidity-related photoluminescence in gadolinium niobate nanophosphors synthesized at low temperatures

Autor:	M.M. Tellez-Cruz, Anastasiya Sedova, Ciro Falcony
Rok vydání:	2022
Předmět:	Materials science Photoluminescence Mechanical Engineering Gadolinium Analytical chemistry chemistry.chemical_element Crystal structure Thermal treatment Condensed Matter Physics Adsorption chemistry Mechanics of Materials General Materials Science Orthorhombic crystal system Crystallite Excitation
Zdroj:	Materials Research Bulletin. 146:111600
ISSN:	0025-5408
Popis:	In this work, gadolinium niobate nanophosphors were successfully synthesized and their pristine and humidity-related photoluminescence was studied. Polycrystalline layered bar-, cube-, and flower-like morphologies of this material were obtained without any surfactant in a controlled and reproducible manner. This gadolinium niobate compound was determined to be GdNb2O6 with an orthorhombic crystalline structure and a Pnma space group. Water adsorbed to the nanophosphors surface presented a 440 nm photoluminescence emission. This emission was a direct result of the excitation bands overlap of intrinsic GdNb2O6 matrix and water. Thulium-doped nanophosphors (Gd1-xTmxNb2O6) were also studied concerning Tm3+ and water-associated emissions. The GdNb2O6 and Gd1-xTmxNb2O6 compounds presented photoluminescence before and after low-temperature thermal treatment that varied between the morphologies.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3892efeca1e46094018041175ced8ce7 https://doi.org/10.1016/j.materresbull.2021.111600 Zobrazit plný text záznamu Full Text from ScienceDirect