Degradation of Rhodamine B by Visible Light Driven MoO 3 @TiO 2 Core-Shell Photocatalyst.

In this study, a MoO ₃ @TiO ₂ composite core-shell material was developed to remove Rhodamine B (RhB) dye through synergistic adsorption and photocatalytic degradation. n-n heterostructures were formed by coupling n-type semiconductors to enhance the efficiency of photocarrier separation and photocatalytic performance. MoO ₃ , which possesses strong adsorption capacity, was primarily used as a dye adsorbent. Additionally, the formation of an n-n heterojunction with TiO ₂ enabled MoO ₃ to expand the photocorresponding range of TiO ₂ , leading to the generation of superoxide (O ₂ ^• ) and hydroxyl ( ^• OH) free radicals for dye degradation. The experimental results demonstrate that the MoO ₃ @TiO ₂ core-shell composite exhibits excellent performance for RhB dye removal, with adsorption and degradation rates reaching 35.7 and 70.3%, respectively, even at low catalyst concentrations. This approach offers new insights into the development of MoO ₃ core-shell photocatalysts.