Issue 4, 2023

A Z-scheme heterojunction of porphyrin-based core–shell Zr-MOF@Pro-COF-Br hybrid materials for efficient visible-light-driven CO2 reduction

Abstract

Converting CO2 to high value-added products through “artificial photosynthesis” under mild conditions is a promising strategy. However, it is still a challenge to fabricate efficient photocatalysts. In this work, NH2–UiO-66 was used as the core, and Pro-COF-Br was in situ coated on the core according to the Schiff-base reaction, and hence a series of novel core–shell hybrid materials was constructed. The introduction of the core gave the hybrid materials abundant unsaturated metal sites and coating Pro-COF-Br on the core endowed them with high surface area, outstanding physicochemical stability, and high CO2 capture capacity. In addition, the porphyrin structure on the Pro-COF-Br shell greatly improved visible light utilization and the formed C[double bond, length as m-dash]N covalent bonds at the interface increased the transfer rate of the photogenerated electrons. In particular, the formation of a Z-scheme heterostructure significantly enhanced the separation efficiency of the photogenerated electrons and holes, and thus improved the visible-light-driven CO2 reduction. The synthesized product, namely, M@C–Br-1, exhibited the highest CO yield of 106.35 μmol g−1, about 2.6 times higher than that exhibited by Zr-MOF (40.65 μmol g−1) and 3.2 times higher than that exhibited by Pro-COF-Br (33.21 μmol g−1), and the CO/CH4 selectivity was as high as 63.17%. This work offers a facile and effective strategy to construct novel core–shell MOFs@COF photocatalysts with good photocatalytic performance.

Graphical abstract: A Z-scheme heterojunction of porphyrin-based core–shell Zr-MOF@Pro-COF-Br hybrid materials for efficient visible-light-driven CO2 reduction

Supplementary files

Article information

Article type
Paper
Submitted
25 Oct 2022
Accepted
19 Dec 2022
First published
20 Dec 2022

J. Mater. Chem. A, 2023,11, 2023-2030

A Z-scheme heterojunction of porphyrin-based core–shell Zr-MOF@Pro-COF-Br hybrid materials for efficient visible-light-driven CO2 reduction

J. Wang, Z. Dai, L. Wang, D. Zhang, Y. Wang, J. Li, F. Zhou and J. Huang, J. Mater. Chem. A, 2023, 11, 2023 DOI: 10.1039/D2TA08333G

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