Article Modified layered double hydroxides for efficient and reversible carbon dioxide capture from air Zhu et al. synthesize modified layered double hydroxides (LDHs) to capture CO 2 from ambient air. Exposed hydroxyl groups on LDHs react with aminosilanes to form amine monolayer grafted nanosheets, allowing ultrafast CO 2 capture. Platelet size, thickness, and exfoliated morphology have a significant impact on obtaining the optimal amine grafting.