Fe₂TiO₅/Fe₂O₃ (Shell/Shell)\nand (Shell/Core) Heterostructured for Efficient\nOxygen Evolution

Abstract

A delicate\nsynthesis strategy of Fe₂TiO₅/Fe₂O₃ (shell/shell (s/s)) and (shell/core (s/c)) heterostructures\nwas proposed to realize efficient photocatalytic water oxidation.\nThe hierarchical structure increases the light absorption depth of\nmaterial, the strongly coupled components promoted the separation\nof photoinduced excitons, and the high surface area with adequate\nporosity allowed the diffusion of electrolyte to adsorb at rich active\nsites. Furthermore, Fe₂TiO₅/Fe₂O₃ (s/s) was coated by graphitic carbon nitride (g-CN) subunits\nand exhibited good photocatalytic water reduction, resulting from\nthe contact interface accelerating the effective separation of electrons\nand holes.