Construction of COF/COF Organic S-Scheme Heterostructure for Enhanced Overall Water Splitting

Construction of COF/COF Organic S-Scheme Heterostructure for Enhanced Overall Water Splitting

© 2024 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 49 vom: 23. Dez., Seite e2412653
1. Verfasser: Luan, Bing-Bing (VerfasserIn)
Weitere Verfasser: Chu, Xiaoyu, Wang, Ya, Qiao, Xiu, Jiang, Yanxia, Zhang, Feng-Ming
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article S‐scheme heterostructure covalent organic framework interface matching overall water splitting photocatalysis
Beschreibung
Zusammenfassung:© 2024 Wiley‐VCH GmbH.
Covalent organic frameworks (COFs) as a new type of photocatalysts have shown unique advantages in visible-light-driven hydrogen evolution, while the reported overall water-splitting systems are still very rare among various COF-based photocatalysts. Herein, two COFs are integrated to construct a type of organic S-scheme heterojunction for improved overall water splitting. In this system, TpBpy-COF and COF-316 serve as H2- and O2-evolving components, respectively, which are combined through π-π interaction between conjugated aromatic rings. By introducing ultra-small Pt nanoparticles (NPs) into the pores of the TpBpy-COF nanosheets (NS), the resultant COF-316/PtTpBpy-COF NS heterostructure achieves extremely high H2 and O2 evolution rates of 220.4 and 110.2 µmol g-1 h-1, respectively, under visible light irradiation (λ ≥ 420 nm). The results of transient absorption spectra (TAS) and photoelectronic measurements indicate that the organic heterojunction interface notably facilitates the separation and transfer of photogenerated electron-hole pairs. Further, theoretical calculations and in situ experiments confirm the spontaneous formation of the COF/COF heterojunction interface and the active sites for overall water splitting
Beschreibung:Date Revised 05.12.2024
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202412653