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Cu nanocrystals enhanced charge separation and transfer in superior thin g-C3N4 nanosheets by Xu, Baogang (author);Zhang, Hongyu (author);Baran, Pawel (author);Matras-Postolek, Katarzyna (author);Yang, Ping (author) is a Materials Science article available to read on EtoBox.

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A two-step thermal condensation approach was developed to fabricate Cu and graphic carbon nitride (g-C3N4) composites. Cu nanocrystals (NCs) with a size range of 2 – 5 nm were embedded in superior thin g-C3N4 nanosheets. Although little amount of Cu NCs was incorporated in g-C3N4 nanosheets, Cu/g-C3N4 composites revealed promoting influence towards photocatalytic H2 generation and photodegradation of pollutions. Namely, the sample 680-Cu0.05% (with Cu of 0.05 wt%) revealed the best photocatalytic performance. Electrochemical test indicates that Cu NCs improve the productivity of the samples. Narrowed band gap in Cu/g-C3N4 composite samples resulted in an expanded photo adsorption in visible light range. The composites also revealed enhanced optical current response and small interfacial charge transport resistances compared with pure g-C3N4 nanosheets (sample Pure-680). The photocatalytic H2 generation rate of the composite was ~ 2790 μmol g−1 h−1, which is 2.3 times of that of Pure-680. The degradation efficiency of rhodamine B using the composite sample reached 95.5 % with a photodegradation rate of 0.0774 min−1 and was described a zero-order kinetics model (C0-C=kt) with a proce

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Author

Xu, Baogang (author);Zhang, Hongyu (author);Baran, Pawel (author);Matras-Postolek, Katarzyna (author);Yang, Ping (author)

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Materials Science (Physical Sciences)