Fe(III)-functionalized carbon dots—Highly efficient photoluminescence redox catalyst for hydrogenations of olefins and decomposition of hydrogen peroxide
| Autor: | Radek Zboril, Sergii Kalytchuk, Manoj B. Gawande, Antonios Kouloumpis, Anandarup Goswami, Athanasios B. Bourlinos, Emmanuel P. Giannelis, Michael A. Karakassides, Dimitrios Gournis, Anuj K. Rathi, Katerina Hola, Y. Deligiannakis |
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| Rok vydání: | 2017 |
| Předmět: |
Olefin fiber
Chemistry Inorganic chemistry Xylene Substrate (chemistry) Quantum yield 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Reagent General Materials Science Oxidative coupling of methane 0210 nano-technology Hydrogen peroxide |
| Zdroj: | Applied Materials Today. 7:179-184 |
| ISSN: | 2352-9407 |
| DOI: | 10.1016/j.apmt.2017.03.002 |
| Popis: | We present the first bottom-up approach to synthesize Fe(III)-functionalized carbon dots (CDs) from molecular precursors without the need of conventional thermal or microwave treatment and additional reagents. Specifically, sonication of xylene in the presence of anhydrous FeCl 3 results in oxidative coupling of the aromatic substrate towards Fe(III)-functionalized CDs. The as-prepared CDs are spherical in shape with a size of 3–8 nm, highly dispersible in organic solvents and display wavelength-dependent photoluminescence (PL). The iron ions attached to the surface endow the CDs with superior catalytic activity for olefin hydrogenation with excellent conversion and selectivity (up to 100%). The Fe(III)-CDs are more effective in the hydrogenation of a series of electron donating or withdrawing olefin substrates compared to conventional homogeneous or heterogeneous Fe(III)-based catalysts. The as-prepared heterogeneous nanocatalyst can be used repeatedly without any loss of catalytic activity. Importantly, the stability of the new catalysts can be easily monitored by PL intensity or quantum yield measurements, which certainly opens the doors for real time monitoring in a range of applications. Additionally, to the best of our knowledge, for the first time, the oxidative property of Fe-CDs was also explored in decomposition of hydrogen peroxide in water with the first order rate constant of 0.7 × 10 −2 min −1 , proving the versatile catalytic properties of such hybrid systems. |
| Databáze: | OpenAIRE |
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