Interface Engineering of a 2D/2D BiVO₄/Bi₄V₂O₁₀ Heterostructure with Improved Photocatalytic Photoredox Activity

Bismuth vanadate (BiVO₄) is a promising photocatalyst for water pollution degradation and photocatalytic oxygen evolution. In this work, we prepared 2D/2D BiVO₄–Bi₄V₂O₁₀ heterostructure with tight interfacial contact via a facile one-step hydrothermal process. The crystal structure and morphology of the samples could be easily regulated by changing the pH values of the solution. The BiVO₄–Bi₄V₂O₁₀ heterostructure exhibited an enhanced photodegradation rate of Cr­(VI) and oxygen evolution that of bare BiVO₄, indicating that the synergistic effect and the interfacial fusions between BiVO₄ and Bi₄V₂O₁₀ can effectively promote the migration and separation rate of photoexcited charge carriers.