Mechanochemical bottom-up synthesis of phosphorus-linked, heptazine-based carbon nitrides using sodium phosphide

Submitting author affiliation:
McGill University, Montreal, Canada

Beilstein Arch. 2022, 202245.

Published 07 Jun 2022

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Herein we present the bottom-up, mechanochemical synthesis of phosphorus-bridged heptazine based carbon nitrides (g-h-PCN). The structure of these materials was determined through a combination of powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), 31P magic angle spinning nuclear magnetic resonance (MAS NMR), density functional theory (DFT) and electron energy loss spectroscopy (EELS). Compared to traditional furnace-based techniques, the presented method utilizes milder conditions, as well as shorter reaction times. Both samples of g-h-PCN directly after milling and aging and after an hour of annealing at 300 °C (g-h-PCN300) show a reduction in photoluminescent recombination, as well as a nearly two-time increase in photocurrent under broad spectrum irradiation, which are appealing properties for photocatalysis.

Keywords: Mechanochemistry, graphitic carbon nitride, sodium phosphide, phosphorus precursor, 2D material, density functional theory

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Fiss, B. G.; Douglas, G.; Ferguson, M.; Becerra, J.; Valdez, J.; Do, T.-O.; Friscic, T.; Moores, A. H. Beilstein Arch. 2022, 202245. doi:10.3762/bxiv.2022.45.v1

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