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Water-Soluble Polymeric Carbon Nitride Colloidal Nanoparticles for Highly Selective Quasi-Homogeneous Photocatalysis |
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| Authors: | Dr. Igor Krivtsov Dr. Dariusz Mitoraj Christiane Adler Dr. Marina Ilkaeva Dr. Mariana Sardo Dr. Luís Mafra Christof Neumann Prof. Andrey Turchanin Chunyu Li Prof. Benjamin Dietzek Robert Leiter Dr. Johannes Biskupek Prof. Ute Kaiser Changbin Im Björn Kirchhoff Prof. Timo Jacob Prof. Radim Beranek |
| Affiliation: | 1. Department of Organic and Inorganic Chemistry, University of Oviedo-CINN, 33006 Oviedo, Spain;2. Institute of Electrochemistry, Ulm University, Albert-Einstein-Allee 47, 89081 Ulm, Germany;3. CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal;4. Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Lessingstrasse 10, 07743 Jena, Germany Center for Energy and Environmental Chemistry Jena (CEEC Jena), Philosophenweg 7a, 07743 Jena, Germany;5. Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Lessingstrasse 10, 07743 Jena, Germany;6. Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Lessingstrasse 10, 07743 Jena, Germany Department Functional Interfaces, Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Strasse 9, 07745 Jena, Germany;7. Electron Microscopy of Materials Science, Central Facility for Electron Microscopy, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany |
| Abstract: | Heptazine-based polymeric carbon nitrides (PCN) are promising photocatalysts for light-driven redox transformations. However, their activity is hampered by low surface area resulting in low concentration of accessible active sites. Herein, we report a bottom-up preparation of PCN nanoparticles with a narrow size distribution (ca. 10±3 nm), which are fully soluble in water showing no gelation or precipitation over several months. They allow photocatalysis to be carried out under quasi-homogeneous conditions. The superior performance of water-soluble PCN, compared to conventional solid PCN, is shown in photocatalytic H2O2 production via reduction of oxygen accompanied by highly selective photooxidation of 4-methoxybenzyl alcohol and benzyl alcohol or lignocellulose-derived feedstock (ethanol, glycerol, glucose). The dissolved photocatalyst can be easily recovered and re-dissolved by simple modulation of the ionic strength of the medium, without any loss of activity and selectivity. |
| Keywords: | Chemoselektivität Kohlenstoffnitrid Nanopartikel Photokatalyse Quasi-homogene Katalyse |