Solvothermal synthesis of CdTiO3/Ti3C2 MXene composite as a new efficient visible light photocatalyst.

CdTiO 3 /Ti 3 C 2 MXene (CdTiO 3 /TCM) heterojunctions were created using coordination-solvothermal synthesis, effectively addressing the rapid recombination and slow migration of photogenerated carriers in single semiconductor photocatalysts. The CdTiO 3 /TCM heterojunction consists of shuttle-like CdTiO 3 structures implanted on the surface of multilayered Ti 3 C 2 MXene, significantly enhancing the specific surface area and visible light capture capability. The photocatalytic degradation rate constant of CdTiO 3 /TCM-B under visible light for Rhodamine B (RhB) reached 8.7 ×10 – 3 min – 1, 7.25 times that of pure CdTiO 3. CdTiO 3 /TCM-B maintained high degradation activity even after five cycles of use. Experimental results indicate that superoxide radicals (•O 2 – ) and hydroxyl radicals (•OH) were the main active species in the degradation process of RhB. Analysis of photoelectric properties and band structure revealed the role of the heterojunction structure in promoting the separation and transfer of photogenerated charges. The results confirm that Ti 3 C 2 MXene, as a cocatalyst for CdTiO 3 , can significantly improve photocatalytic performance, demonstrating the potential for developing new visible light photocatalysts. [Display omitted] • CdTiO 3 /Ti 3 C 2 MXene was synthesized via a straightforward coordination-solvothermal method. • Integrating CdTiO 3 particles on Ti 3 C 2 MXene layers in a shuttle-like configuration. • Schottky junction heterojunction formed, enhancing charge transfer and separation. • Superior photocatalysis in degrading rhodamine B under visible light. [ABSTRACT FROM AUTHOR]