Recent advances, application and prospect in g-C3N4-based S-scheme heterojunction photocatalysts
SEPARATION AND PURIFICATION TECHNOLOGY(2024)
Abstract
Semiconductor photocatalytic technology has great potential in solar energy utilization and conversion and meets people's demand for sustainable development. In recent years, graphitic carbon nitride (g-C3N4) has been considered as a potential photocatalyst due to its unique electronic band structure, excellent optical and electronic properties, cheap raw materials and easy synthesis. However, the single g-C3N4 faces the high recombination rate of photogenerated electron-hole pairs and its low reduction and oxidation capacity, which limits its practical application in the field of photocatalysis. The emerging S-scheme heterojunction can overcome the problems existing in the traditional type-II and Z-scheme heterojunctions and has great advantages in improving the photocatalytic activity by photo-generated electron transfer. Hence, the design mechanism of the S-scheme heterojunction and the proof of its charge transfer mechanism are presented in detail in this review. In addition, the synthesis methods, modification strategies and related applications of g-C3N4-based S- scheme heterojunctions are discussed and summarized. Finally, the limitations of current research on S-scheme heterojunction photocatalysts are discussed and prospected.
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Key words
S-scheme,Heterojunction,Photocatalytic,Photocatalysis
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