Synthesis of metal substituted lambda-trititanium-pentoxide (λ-Ti3O5)

摘要

Trititanium-pentoxide (Ti3O5) is a member of TinO2n-1 family which has multiple phases: α-Ti3O5, β-Ti3O5, γ-Ti3O5 and δ-Ti3O5. In 2010, our laboratory discovered a new crystal phase of Ti3O5 called lambda-trititanium-pentoxide (λ-Ti3O5) (Fig. 1a). This new phase shows reversible photo-induced phase transition to β-Ti3O5 at room temperature. Later studies revealed that λ-Ti3O5 also exhibits pressure-induced phase transition and heat-storage properties. In order to control the phase transition properties and further improve the performance to meet application needs, we focused mainly on the metal-substitution effects of titanium atoms. In the present work, we report the synthesis of magnesium-substituted λ-Ti3O5.