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Ionothermal Synthesis of Triazine‐Heptazine Based Co‐frameworks with Apparent Quantum Yields of 60 % at 420 nm for Solar Hydrogen Production from "Sea Water"

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Zhang,  Guigang
Aleksandr Savateev, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Savateev,  Aleksandr
Aleksandr Savateev, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Antonietti,  Markus
Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Citation

Zhang, G., Lin, L., Li, G., Zhang, Y., Savateev, A., Wang, X., et al. (2018). Ionothermal Synthesis of Triazine‐Heptazine Based Co‐frameworks with Apparent Quantum Yields of 60 % at 420 nm for Solar Hydrogen Production from "Sea Water". Angewandte Chemie International Edition. doi:10.1002/anie.201804702.


Cite as: https://hdl.handle.net/21.11116/0000-0001-6D7C-B
Abstract
Polymeric carbon nitride (PCN), either in triazine or heptazine forms, has been regarded as promising metal?free, environmental benign and sustainable photocatalysts for solar hydrogen production. However, PCN in most cases only exhibits moderate activities due to the inherent properties such as rapid charge carrier recombination. Here we present a triazine?heptazine copolymer synthesized from simple post?calcination of PCN in eutectic salts, i.e. NaCl/KCl, to modulate the polymerization process and optimize the structure. The construction of internal triazine?heptazine donor?acceptor (D?A) heterostructures is affirmed to significantly accelerate the charge transfer (CT) and thus corporately boost the photocatalytic activity (AQY= 60 % at 420 nm). This study highlights the construction of intermolecular D?A copolymers in NaCl/KCl molten salts with higher melting points but absence of lithium to modulate the polymerization process and chemical structure of PCN.