Figure 1.

Crystal structure diagram of various 2D MOXs

(A) MoO₃ (Yang et al., 2017a) Copyright 2017, Wiley-Blackwell.

(B) V₂O₅ (Tan et al., 2017) Copyright 2017, American Chemical Society.

(C) h-TiO₂ (Zhang et al., 2021a) Copyright 2021, Springer Nature.

(D) LDHs. M, metal cations; O, hydroxide ions; A, charge-balancing anion or solvation molecule (Tan et al., 2017) Copyright 2017, American Chemical Society.

(E) Bi₂O₂Se (Chen et al., 2018) Copyright 2018, American Association for the Advancement of Science.

(F) CeO₂ (Tan et al., 2017) Copyright 2017, American Chemical Society.