abstract
Porous graphitic carbon nitride obtained by pyrolysis of melamine in the presence of silica (TEOS in the reaction mixture) has been found to be more active in photocatalytic hydrogen evolution from the aqueous solutions of electron donors (organic acids) under visible light irradiation compared to the bulk analogue. The use of the optimal melamine/TEOS molar ratio in the initial reaction mixtures allows to obtain g-C3N4 characterized by increased mesoporosity due to the formation of smaller particles. It has been shown for the first time that oxalic acid can be used as an environmentally friendly sacrificial donor allowing to reach significantly higher rates of the photocatalytic reaction (up to 300 mu mol H-2/h*g(photocat).). (C) 2021 Elsevier B.V. All rights reserved.
keywords
POLYMERIC PHOTOCATALYST; FACILE SYNTHESIS; SURFACE-AREA; DOPED G-C3N4; PORE VOLUME; WATER; ENERGY; NANOMATERIALS; COMPOSITES; CONVERSION
subject category
Chemistry
authors
Shcherban, ND; Shvalagin, VV; Korzhak, GV; Yaremov, PS; Skoryk, MA; Sergiienko, SA; Kuchmiy, SY
our authors
Sergii Sergiienko
Junior Researcheracknowledgements
This research was supported by the General Research Project of the L.V. Pisarzhevskii Institute of Physical Chemistry NAS of Ukraine (funded by the National Academy of Sciences of Ukraine) (project No IPC-A-3-2020) . N.S. acknowledges the support of the Verkhovna Rada of Ukraine to a personal scholarship for young scientists-doctors of sciences for 2021. The authors are grateful to A. Aho for XPS measurements.