Layered double hydroxides-based Z-scheme heterojunction for photocatalysis

Layered double hydroxides (LDHs)-based photocatalysts have generated widespread interest owing to their great potential for solving both energy and environmental issues through directly converting nonconsumable solar energy. Numerous methods have been investigated and analyzed in recent years to promote the photocatalytic efficiency of LDHs. Z-scheme heterojunction that mimics the artificial photosynthesis is employed in photocatalysis owing to the outstanding advantages, such as high quantum efficiency, separation of redox sites, and low recombination of photocarriers. Herein, various LDHs-based Z-scheme heterojunction photocatalysts are briefly reviewed. Z-scheme heterojunction associated with LDHs-based materials exhibit high photocatalysis performance, and these types of hybrids are applied in photocatalytic H₂O splitting, CO₂ reduction, and pollution degradation, which are introduced and summarized in detail. In the end, a brief conclusion focused on future challenges and expectations of LDH-based Z-scheme photocatalytic system is presented. We expect that more advances for LDH-based Z-scheme photocatalyst can be achieved in the field of photocatalysis in the coming days.