Dual-Function HKUST-1: Templating and Catalyzing Formation of Graphitic Carbon Nitride Quantum Dots Under Mild Conditions |
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| Authors: | Mohamed K Albolkany Dr Yang Wang Dr Weijin Li Syeda Arooj Chun-Hui Chen Niannian Wu Yan Wang Prof?Dr Radek Zbo?il Prof?Dr Roland A Fischer Prof?Dr Bo Liu |
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| Institution: | 1. Hefei National Laboratory for Physical Sciences at the Microscale, Fujian Institute of Innovation of Chinese Academy of Sciences, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026 China;2. Chair for Inorganic and Metal-Organic Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747 Garching, Germany;3. Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University Olomouc, 17. Listopadu 12, 77146 Olomouc, Czech Republic |
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| Abstract: | Graphitic carbon nitride quantum dots (g-CNQDs) are highly promising photoresponsive materials. However, synthesis of monodispersed g-CNQDs remains challenging. Here we report the dual function of MOF Cu3BTC2] (HKUST-1) as a catalyst and template simultaneously to prepare g-CNQDs under mild conditions. Cyanamide (CA), a graphitic carbon nitride precursor, catalytically dimerized inside the larger MOF cavities at 90 °C and condensed into g-CNQDs at 120 °C in a controlled fashion. The HKUST-1 template was stable under the reaction conditions, leading to uniform g-CNQDs with a particle size of 2.22±0.68 nm. The as prepared g-CNQDs showed photoluminescence emission with a quantum yield of 3.1 %. This concept (MOF dual functionality) for catalyzing CA polycondensation (open metal sites (OMSs) effect) and controlling the produced particle size (pore-templating effect), together with the tunable MOF porosity, is expected to produce unique g-CNQDs with controllable size, morphology, and surface functionality. |
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| Keywords: | cyanamide polycondensation g-CNQDs HKUST-1 MOF templating photoluminescence |
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