Core-Shell Composite MIL-101(Cr)@TiO(2) for Organic Dye Pollutants and Vehicle Exhaust

MIL-101(Cr)@TiO(2) core-shell composite material was synthesized via the hydrothermal method, where MIL-101(Cr) served as the core and TiO(2) acted as the shell. SEM results revealed that the metal-organic framework core effectively prevented the aggregation of TiO(2) nanoparticles and facilitated their dispersion. Characterization techniques such as XRD, XPS, and TGA were utilized to confirm the successful loading of TiO(2) onto MIL-101(Cr) and its excellent thermal stability. MIL-101(Cr)@TiO(2) was employed in photocatalytic degradation of dye pollutants and vehicle exhaust, and the potential degradation mechanisms were investigated in detail. The results showed that MIL-101(Cr)@TiO(2) exhibited excellent photocatalytic degradation performance towards dye pollutants, with degradation efficiencies of 91.7% and 67.8% achieved for MB and RhB, respectively, under visible light irradiation for 90 min. Furthermore, the photocatalytic degradation of automobile exhaust revealed that the MIL-101(Cr)@TiO(2) composite material also exhibited degradation effects on NO(x), CO, and HC. The degradation efficiency for NO reached 24.2%, indicating its broader applicability.