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Activation of the Carbon Nitride Surface by Silica in a CO‐Evolving Hybrid Photocatalyst
Author(s) -
Wada Keisuke,
Eguchi Miharu,
Ishitani Osamu,
Maeda Kazuhiko
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201600661
Subject(s) - photocatalysis , graphitic carbon nitride , selectivity , catalysis , carbon nitride , photosensitizer , electrochemistry , photoexcitation , photochemistry , chemistry , bifunctional , mesoporous silica , nitride , mesoporous material , carbon fibers , materials science , nanotechnology , electrode , organic chemistry , excited state , physics , composite number , nuclear physics , composite material , layer (electronics)
Photocatalytic reduction of CO 2 to CO proceeded by visible light ( λ >400 nm) using mesoporous graphitic carbon nitride (C 3 N 4 ) coupled with a Ru II –Re I binuclear complex ( RuRe ) containing a photosensitizer and catalytic units. The selectivity to CO exceeded 90 % during the initial stage. Photocatalytic reactions (including isotope tracer experiments) and electrochemical measurements revealed that the reaction proceeded according to a two‐step photoexcitation of C 3 N 4 and the Ru II photosensitizer unit, that is, it followed the Z‐Scheme mechanism. Modification of C 3 N 4 with highly dispersed silica was found to improve the ability of C 3 N 4 to accommodate RuRe , which enhanced the photocatalytic activity for CO production.