Journal
ADVANCED ENERGY MATERIALS
Volume 8, Issue 3, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201701503
Keywords
carbon nitride; charger transfer; direct Z-schemes; heterostructures; photocatalysts
Categories
Funding
- NSFC [21433007, 51320105001, 21573170, 51372190]
- 973 project [2013CB632402]
- Fundamental Research Funds for the Central Universities [2015-III-034]
- Natural Science Foundation of Hubei Province of China [2015CFA001]
- Self-determined and Innovative Research Funds of SKLWUT [2017-ZD-4]
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Photocatalysis is considered as one of the promising routes to solve the energy and environmental crises by utilizing solar energy. Graphitic carbon nitride (g-C3N4) has attracted worldwide attention due to its visible-light activity, facile synthesis from low-cost materials, chemical stability, and unique layered structure. However, the pure g-C3N4 photocatalyst still suffers from its low separation efficiency of photogenerated charge carriers, which results in unsatisfactory photocatalytic activity. Recently, g-C3N4-based heterostructures have become research hotspots for their greatly enhanced charge carrier separation efficiency and photocatalytic performance. According to the different transfer mechanisms of photogenerated charge carriers between g-C3N4 and the coupled components, the g-C3N4-based heterostructured photocatalysts can be divided into the following categories: g-C3N4-based conventional type II heterojunction, g-C3N4-based Z-scheme heterojunction, g-C3N4-based p-n heterojunction, g-C3N4/metal heterostructure, and g-C3N4/carbon heterostructure. This review summarizes the recent significant progress on the design of g-C3N4-based heterostructured photocatalysts and their special separation/transfer mechanisms of photogenerated charge carriers. Moreover, their applications in environmental and energy fields, e.g., water splitting, carbon dioxide reduction, and degradation of pollutants, are also reviewed. Finally, some concluding remarks and perspectives on the challenges and opportunities for exploring advanced g-C3N4-based heterostructured photocatalysts are presented.
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