Stable lead-halide perovskite quantum dots as efficient visible light photocatalysts for organic transformations
| Autor: | Peter Reiss, Bikram Gurung, Wai Li Ling, Sukanya Borthakur, Lakshi Saikia, Sudarsan Tamang, Surakcha Thapa, Sajan Pradhan, Sagarmani Rasaily, Deshaj Bhujel, Siddhant Basel, Anand Pariyar, Debesh Sharma |
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| Přispěvatelé: | Department of Chemistry, School of Physical Sciences, Sikkim Manipal University (SMU), Department of Material Science, North-East Institute of Science and Technology, Assam University, Institut de biologie structurale (IBS - UMR 5075), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Synthèse, Structure et Propriétés de Matériaux Fonctionnels (STEP ), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Département Interfaces pour l'énergie, la Santé et l'Environnement (DIESE), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Microscopie électronique, ANR-16-CE05-0019,PERSIL,Cellules solaires tandem Perovskite-Silicium nanocristallin(2016) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
[SDV.BBM.BS]Life Sciences [q-bio]/Biochemistry Molecular Biology/Structural Biology [q-bio.BM] General Engineering Halide Bioengineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Catalysis Rhodamine 6G chemistry.chemical_compound chemistry Quantum dot Photocatalysis General Materials Science Organic synthesis Chemical stability 0210 nano-technology Perovskite (structure) |
| Zdroj: | Nanoscale Advances Nanoscale Advances, 2021, 3 (5), pp.1464-1472. ⟨10.1039/D0NA00992J⟩ Nanoscale Advances, RSC, 2021, 3 (5), pp.1464-1472. ⟨10.1039/D0NA00992J⟩ |
| ISSN: | 2516-0230 |
| DOI: | 10.1039/D0NA00992J⟩ |
| Popis: | International audience; Lead halide perovskite (LHP) based colloidal quantum dots (CQDs) have tremendous potential for photocatalysis due to their exceptional optical properties. However, their applicability in catalysis is restricted due to poor chemical stability and low recyclability. We report halide-passivated, monodisperse CsPbBr3CQDs as a stable and efficient visible-light photocatalyst for organic transformations. We demonstrate oxidative aromatization of a wide range of heterocyclic substrates including examples which are poor hydrogen transfer (HAT) reagents. Two to five-fold higher rate kinetics were observed for reactions catalyzed by CsPbBr3CQDs in comparison with bulk-type CsPbBr3 (PNCs) or conventionally synthesized CsPbBr3CQDs and other metal organic dyes (rhodamine 6G and [Ru(bpy)3]2+). Furthermore, these CQDs exhibit improved air-tolerance and photostability and in turn show a higher turnover number (TON) of 200, compared to conventionally prepared CQDs (TON = 166) and state-of-the-art bulk-type perovskite-based catalyst (TON = 177). Our study paves the way for the practical applicability of energy-level tunable, size-controlled LHP CQDs as efficient photocatalysts in organic synthesis. |
| Databáze: | OpenAIRE |
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