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Donor–Acceptor‐Type Heptazine‐Based Polymer Networks for Photocatalytic Hydrogen Evolution
Author(s) -
Kailasam Kamalakannan,
Mesch Maria B.,
Möhlmann Lennart,
Baar Moritz,
Blechert Siegfried,
Schwarze Michael,
Schröder Marc,
Schomäcker Reinhard,
Senker Jürgen,
Thomas Arne
Publication year - 2016
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201500478
Subject(s) - photocatalysis , graphitic carbon nitride , water splitting , acceptor , materials science , carbon nitride , hydrogen , polymer , electron acceptor , photochemistry , catalysis , electron donor , photocatalytic water splitting , hydrogen bond , chemistry , nanotechnology , chemical engineering , molecule , organic chemistry , physics , composite material , condensed matter physics , engineering
A heptazine‐based polymer network (HMP‐3) with a donor–acceptor (D–A) structure was prepared and tested as catalyst for photocatalytic hydrogen evolution from water. Compared to other heptazine‐based materials, which are typically prepared at high temperatures and have recently received much interest as metal‐free photocatalysts, the low‐temperature protocol applied here allows the defined introduction of organic functional groups within the polymer backbone. The structure of HMP‐3 contains alternating heptazine and benzothiadiazole moieties as electron acceptors connected by aminobenzene bridges as electron donors. The resulting material leads to enhanced hydrogen evolution compared to graphitic carbon nitride materials prepared at high temperatures (>500 °C) most probably because of the stabilization of photogenerated charge carriers in the D–A structure.