Synthesis of large-sized two-dimensional α-MoO₃ van der Waals crystals by TiO₂ assisted selective facet passivation and their application to lustering pigments = Synthesis of large-sized two-dimensional α-MoO₃ van der Waals crystals by TiO₂ assisted selective facet passivation and their application to lustering pigments

다국어 초록 (Multilingual Abstract)

Large-sized α-MoO₃ nanoplates were synthesized by introduction of titanium tetra isopropoxide as TiO₂ precursor in hydrothermal solution chemistry. During the hydrothermal synthesis, the TiO₂ can be selectively deposited on the (001) facets of h-MoO₃ hexagonal rods and on the (001) and/or (010) facet of α-MoO₃ re-growing crystals due to the small lattice mismatch between them. Owing to the TiO₂ passivation of the surface of h-MoO₃ rods, the h-MoO₃ rods are changed to MoO₃ tubes because the h-MoO₃ are dissolved from the inner part of the TiO₂ passivated h-MoO₃ rods. The TiO₂-passivated (001) facets of h-MoO₃ rods act as templates for the re-growth of α-MoO₃ and consequently produced rectangle-shaped α-MoO₃ nanoplates. Simultaneously, the TiO₂ passivated on the (001) and/or (010) facet of the re-growing α -MoO₃ crystals inhibits the preferred crystal growth to [001] direction and promoted the crystal growth to [100] direction, thereby yielding plate-shaped α-MoO₃.