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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Purohit, Bhagyesh
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2021Precursors-guided synthesis of upconverting nanomaterials for near-infrared driven photocatalysis ; Synthèse guidée par des précurseurs de nanomatériaux à conversion ascendante pour la photocatalyse dans le proche infrarouge
- 2020Quest to enhance up-conversion efficiency: a comparison of anhydrous vs. hydrous synthesis of NaGdF4: Yb3+ and Tm3+ nanoparticlescitations
- 2019Precursor-directed synthesis of upconverting LiYF4:Yb3+, Tm3+ nanoparticles and their composites designed for near infra-red driven photocatalysis
Places of action
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conferencepaper
Precursor-directed synthesis of upconverting LiYF4:Yb3+, Tm3+ nanoparticles and their composites designed for near infra-red driven photocatalysis
Abstract
Titanium dioxide (TiO2) and graphitic carbon nitride (g-C3N4) are among the most promising photocatalysts due to their low cost, non-toxicity and high catalytic activity. However, these photocatalysts also have certain limitations in terms of low efficiency of visible light utilization and high recombination rate of the photo-generated electron-hole pairs. Coupling of these photocatalysts with lanthanide-based upconverting nanoparticles (UCNPs) can lead to utilization of near-infrared part of the solar spectrum and, therefore, enhance the photocatalytic efficiency many folds.1 In this context, upconverting nanomaterials LiYF4: Tm3+/Yb3+ have great potential as they show intense upconverted emissions in the deep-UV region,2 which would greatly facilitate efficiency of above photocatalysts. However, in comparison to the more thoroughly investigated NaLnF4-based systems, the studies on upconverting nanomaterials based on the LiYF4 host matrix remain in its nascent state.3Here we describe bottom-up synthesis of a series of LiYF4 nanocrystals (NCs) co-doped with varying amount of Yb3+ and Tm3+ ions using new molecular precursors [Ln(TFA)3(monoglyme)] [Ln = Y, Tm, Yb] and [Li(TFA)(monoglyme)] (where TFA = trifluoroacetate, and monoglyme = dimethoxyethane). These precursors, synthesized in a simple one-pot reaction and characterized by spectroscopy, single crystal X-ray structures and thermogravimetric studies, are advantageous in terms of being anhydrous. The multicolour up-conversion fluorescence studies of the obtained LiYF4:Tm3+/Yb3+ NCs established them to be promising UC nanophosphors, which were further used to prepare composites with earlier-mentioned photocatalysts to realize near IR-driven photocatalysis. [1] a) S. Wu1, J. Lv, F. Wang, N. Duan, Q. Li, Z. Wang, Sci. Rep., 7, 14435-14746 (2018); b) Y. Chen, S. Mishra, G. Ledoux, E. Jeanneau, M. Daniel, J. Zhang, S. Daniele, Chem. Asian J. 9, 2415‒2421 (2014). [2] V. Mahalingam, F. Vetrone, R. Naccache, A. Speghini, J. A. Capobianco, Adv. Mater., 21, 4025–4028 (2009). [3] T. Cheng, R. Marin, A. Skripka, F. Vetrone, J. Am. Chem. Soc., 140, 12890−12899 (2018).