Sandwich-like mesoporous graphite-like carbon nitride (Meso-g-CN)/WP/Meso-g-CN laminated heterojunctions solar-driven photocatalysts.

Author(s) Yang, Z.; Xing, Z.; Feng, Q.; Jiang, H.; Zhang, J.; Xiao, Y.; Li, Z.; Chen, P.; Zhou, W.
Journal J Colloid Interface Sci
Date Published 2020 May 15

Three-dimensional mesoporous graphite-like carbon nitride (Meso-g-CN/WP/Meso-g-CN) laminated heterojunction nanosheets are successfully synthesized by solid-phase in situ reduction combined with high temperature calcination. Meso-g-CN/WP/Meso-g-CN has a relatively high specific surface area of 82 m g, a large pore size of 8-15 nm, and a narrow band gap of ~2.7 eV. The solar-driven photocatalytic reaction hydrogen production rate (~198.1 μmol hg) for Meso-g-CN/WP/Meso-g-CN 3D laminated heterojunctions is approximately 10 times higher than that of pristine g-CN. This discrepancy can be attributed to the synergistic effect of the 3D interbed heterojunction structure, which favors the spatial separation of photogenerated charge carriers due to its suitable band positions; its nanosheet structure, favoring the charge transfer to surface; and its mesoporous structures, offering more surface active sites and facilitating mass transfer. This novel sandwich-like laminated heterojunction structure offers new insights for the fabrication of other high-performance photocatalysts.

DOI 10.1016/j.jcis.2020.02.060
ISSN 1095-7103
Citation J Colloid Interface Sci. 2020;568:255263.

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