CoCO3 hierarchical structure embedded on g-C3N4 nanosheets to assemble 3D/2D Z-scheme heterojunction towards efficiently and stably photocatalytic hydrogen production.
- Resource Type
- Article
- Authors
- Dong, Hongjun; Xiao, Mengya; Zhu, Daqiang; Zuo, Yan; Cheng, Shasha; Han, Zhonghui; Li, Chunmei
- Source
- International Journal of Hydrogen Energy. Sep2021, Vol. 46 Issue 63, p32044-32054. 11p.
- Subject
- *NANOSTRUCTURED materials
*HYDROGEN production
*HETEROJUNCTIONS
*SILVER
*QUANTUM efficiency
*SILVER phosphates
*CHARGE transfer
*INTERFACE structures
- Language
- ISSN
- 0360-3199
Structure and interface control of heterojunction is usually a challenging issue to improve the photocatalytic performance. Herein, a new 3D/2D CoCO 3 /g-C 3 N 4 heterojunction is assembled by embedding hexahedral CoCO 3 on g-C 3 N 4 nanosheets. The unique step-like hierarchical structure of CoCO 3 , the formed built-in electric field and Z-scheme charge transfer behavior at the interface jointly drive the high-efficient separation of photogenerated carriers to boost the photocatalytic H 2 production. It achieves the optimal H 2 production rate that is almost 2.6 times than g-C 3 N 4 , apparent quantum efficiency (AQE) of 10.1% at 400 nm and continuous running of 60 h over the 3D/2D CoCO 3 /g-C 3 N 4 heterojunction. This work endows a fresh structural control strategy for the fabrication of 3D/2D Z-scheme heterojunction to improve the photocatalytic H 2 production performance. • CoCO 3 step-like hierarchical structure avails to form built-in electric field. • 3D/2D heterojunction is prepared by embedding hexahedral CoCO 3 on g-C 3 N 4 surface. • Z-Sheme heterostructure promotes interfacial transfer and separation of carriers. • The work has insight into a fresh structural control strategy. [ABSTRACT FROM AUTHOR]