Z-Scheme Bi/Bi2O2CO3/Layered Double-Hydroxide Nanosheet Heterojunctions for Photocatalytic CO2 Reduction under Visible Light

A Z-scheme Bi2O2CO3/Bi/NiAl-LDH (BBOC/LDH) nanosheet heterojunction was fabricated by a hydrothermal method. The BBOC/LDH composites exhibited superior performance for photocatalytic CO2 reduction. A maximum yield of CH4 with the value of 56.64 μmol/gcat was achieved on 20%BBOC/LDH composite, which was 3.9-fold higher than pure LDH. The larger specific surface area, and the efficient separation of photoexcited electrons and holes attributed to the metal Bi SPR effect and Z-scheme heterojunction, enhanced the CO2 photoreduction performance.