An Interface Optimization Strategy for g-C3N4-Based S-Scheme Heterojunction Photocatalysts.

Langmuir : the ACS Journal of Surfaces and Colloids
Xin XuYuesong Shen

Abstract

Graphitic carbon nitride (CN) has attracted much attention in photocatalytic fields due to its unique electronic band structure. However, the rapid recombination of photogenerated carriers severely inhibits its catalytic activity. The heterojunction structure has been widely confirmed to significantly improve the photocatalytic activity of CN through the formed interface structure. However, researchers often give attention to the band matching and conductivity of the cocatalyst, while the importance of the interface as a migration channel for photogenerated carriers is often overlooked. In this work, we adopt the strategy of morphology engineering to regulate the morphology of the CN photoactive component so as to achieve the interface optimization of the traditional heterojunction structure. The photocatalytic degradation experiment of rhodamine B shows that compared with the traditional CeO2@CN heterojunction structure, the photocatalytic activity of the interface-optimized CeO2/CN is increased by more than 20%. The following points could be used to explain the improvement of photocatalytic activity: (I) the formed S-scheme heterojunction structure, which inhibits the recombination of useful electrons and holes but expedites ...Continue Reading

References

Nov 11, 2008·Nature Materials·Xinchen WangMarkus Antonietti
Mar 19, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Xiaojie SheHuaming Li
Feb 13, 2016·ACS Applied Materials & Interfaces·Lijuan YeShijian Chen
Feb 22, 2017·Advanced Materials·Jingxiang LowAhmed A Al-Ghamdi
Sep 16, 2017·ACS Applied Materials & Interfaces·Ossama ElbannaTetsuro Majima
Mar 10, 2020·ACS Omega·Devina Rattan PaulAnshu Sharma

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