Unique homo-heterojunction synergistic system consisting of stacked BiOCl nanoplate/Zn-Cr layered double hydroxide nanosheets promoting photocatalytic conversion of CO2 into solar fuels.

A unique homo-heterojunction synergistic system consisting of stacked BiOCl nanoplate/Zn-Cr layered double hydroxide (Zn-Cr LDH) nanosheets was rationally constructed via a simple electrostatic interaction between them. The purposeful spatial isolation of the holes in the crystal facet-based BiOCl homojunction from the BiOCl/Zn-Cr LDH heterojunction interface significantly increased the survivability of the electrons crossing therein. The optimized loading of Zn-Cr LDH in the system is the prerequisite for the enhanced photoconversion efficiency of CO2.