Recent Progress on Nanostructured Layered Double Hydroxides for Visible-Light-Induced Photoreduction of CO₂

Photoreduction of CO₂ into solar fuels is usually regarded as one of the promising solutions to overcome environmental pollution and the energy crisis. The main challenge in CO₂ photoreduction (CO₂ PR) is the low efficiency and poor selectivity. Layered double hydroxides (LDHs) are a class of 2D materials, consisting with M(OH)₆ octahedra in the host layers and intercalated anions. Owing to the tuneable composition, particle size, morphology, and virtue coordinatively unsaturated active sites, a series of efficient strategies (morphology control, heterostructure, defect control, etc.) in LDH-based photocatalysts have been efficiently developed to enhance the photocatalytic selectivity and activity for CO₂ PR. This review summarizes recent progress on the LDH-based photocatalysts for CO₂ PR.