Fe(III)-functionalized carbon dots—Highly efficient photoluminescence redox catalyst for hydrogenations of olefins and decomposition of hydrogen peroxide
AuthorsBourlinos, Athanasios B.
Rathi, Anuj K.
Gawande, Manoj B.
Karakassides, Michael A.
Giannelis, Emmanuel P.
KAUST Grant NumberKUS-C1-018-02
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AbstractWe 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 FeCl3 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.
CitationBourlinos AB, Rathi AK, Gawande MB, Hola K, Goswami A, et al. (2017) Fe(III)-functionalized carbon dots—Highly efficient photoluminescence redox catalyst for hydrogenations of olefins and decomposition of hydrogen peroxide. Applied Materials Today 7: 179–184. Available: http://dx.doi.org/10.1016/j.apmt.2017.03.002.
SponsorsThe authors acknowledge the support from the Ministry of Education, Youth and Sports of the Czech Republic (LO1305 and CZ.1.05/2.1.00/19.0377), the assistance provided by the Research Infrastructure NanoEnviCz supported by the Ministry of Education, Youth and Sports of the Czech Republic under project no. LM2015073 as well as Award No. KUS-C1-018-02 made by King Abdullah University of Science and Technology (KAUST). This work was further supported by Student Project IGA_PrF_2017_025 of Palacký University. The authors also acknowledge the help of Dr. Ondrej Malina, Dr. Martin Petr, Dr. Radka Krikavova and Dr. Daikopoulos with material characterization of the samples.
JournalApplied Materials Today