Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 47, Pages 20919-20923Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202008397
Keywords
carbon nitride; excitation; lanthanum oxychloride; overall water splitting; solar hydrogen
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Funding
- National Natural Science Foundation of China [21961142019, U1905214, 21861130353, 21673043]
- National Key R&D Program of China [2018YFA0209301]
- Chang Jiang Scholars Program of China [T2016147]
- National Key Basic Research Program of China [2014CB260410]
- Natural Science Foundation of Fujian Province [2019J01630]
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It is a challenge to explore photocatalytic materials for sunlight-driven water splitting owing to the limited choice of a single semiconductor with suitable band energy levels but with a minimized band gap for light harvesting. Here, we report a one-photon excitation pathway by coupling polymeric carbon nitride (PCN) semiconductor with LaOCl to achieve overall water splitting. This artificial photosynthesis composite catalyzes the decomposition of H2O into H(2)and O-2, with evolution rates of 22.3 and 10.7 mu mol h(-1), respectively. The high photocatalytic performance of PCN/LaOCl can be ascribed to the simultaneously accomplished reduction and oxidation of water on LaOCl and PCN domains, respectively, as well as the fast charge separation and migration induced by the interfacial electric field related to LaOCl modification. This study provides new insights on the development of composite photocatalysts for pure water splitting based on polymer-based materials via charge modulation.
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