Exploring the Phase‐Selective, Green, Hydrothermal Synthesis of Upconverting Doped Sodium Yttrium Fluoride: Effects of Temperature, Time, and Precursors
| Autor: | Giacomo Lucchini, Paolo Pastore, Francesca Tajoli, Denis Badocco, Stefano Diodati, Nicola Dengo, Nora Jannsen, Nicola Vicentini, Silvia Gross, Adolfo Speghini |
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| Rok vydání: | 2019 |
| Předmět: |
upconversion
Green chemistry fluoride Dopant 010405 organic chemistry Chemistry Organic Chemistry Doping Hexagonal phase Context (language use) doping General Chemistry 010402 general chemistry 01 natural sciences Catalysis Hydrothermal circulation 0104 chemical sciences hydrothermal synthesis Chemical engineering Phase (matter) low-temperature synthesis Hydrothermal synthesis |
| Zdroj: | Chemistry – A European Journal. 25:13624-13634 |
| ISSN: | 1521-3765 0947-6539 |
| DOI: | 10.1002/chem.201903261 |
| Popis: | The aim of this work was i) to develop a hydrothermal, low-temperature synthesis protocol affording the upconverting hexagonal phase NaYF4 with suitable dopants while adhering to the "green chemistry" standards and ii) to explore the effect that different parameters have on the products. In optimizing the synthesis protocol, short reaction times and low temperatures (below 150 °C) were considered. Yb3+ and Er3+ ions were chosen as dopants for the NaYF4 material. Within the context of the second goal, parameters including nature of the precursors, treatment temperature, and treatment time were investigated to afford a pure hexagonal crystalline phase, both in the doped and undoped materials. To fully explore the synthesis results, the prepared materials were characterized from a structural (XRD), compositional (XPS, ICP-MS), and morphological (SEM) point of view. The upconverting properties of the compounds were confirmed by photoluminescence measurements. |
| Databáze: | OpenAIRE |
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