Effective Prevention of Charge Trapping in Graphitic Carbon Nitride with Nanosized Red Phosphorus Modification for Superior Photo(electro)catalysis
2017; Wiley; Volume: 27; Issue: 46 Linguagem: Inglês
10.1002/adfm.201703484
ISSN1616-3028
AutoresLin Jing, Ruixue Zhu, David Lee Phillips, Jimmy C. Yu,
Tópico(s)2D Materials and Applications
ResumoAbstract The high occurrence of trapped unreactive charges due to chemical defects seriously affects the performance of g‐C 3 N 4 in photocatalytic applications. This problem can be overcome by introducing ultrasmall red phosphorus (red P) crystals on g‐C 3 N 4 sheets. The elemental red P atoms reduce the number of defects in the g‐C 3 N 4 structure by forming new chemical bonds for much more effective charge separation. The product shows significantly enhanced photocatalytic activity toward hydrogen production. To the best of our knowledge, the hydrogen evolution rate obtained on this hybrid should be the highest among all P‐containing g‐C 3 N 4 photocatalysts reported so far. The trapping and detrapping processes in this red P/g‐C 3 N 4 system are thoroughly revealed by using time‐resolved transient absorption spectroscopy.
Referência(s)