ZIF-11/TiO 2 heterojunction composite was successfully synthesized via a simple dispersion-mixing method, yielding a highly efficient photocatalyst for dye degradation. The integration of ZIF-11 and TiO 2 formed a hybrid structure that combined the porous framework characteristics of ZIF-11 with the photoactive, semiconducting properties of TiO 2 , effectively overcoming the intrinsic limitations of each material, such as their wide band gaps and high electron-hole recombination rates. Characterization results revealed that anatase-phase TiO 2 particles were uniformly distributed on the ZIF-11 surface, forming a Z-scheme heterojunction system that promotes efficient charge separation under UV irradiation. Photocatalytic evaluation demonstrated that the Z11T8 composite achieved an impressive 99.92 % degradation efficiency of indigo carmine within 180 min, a significant improvement over pure ZIF-11, which exhibited only 26.01 % efficiency. These findings confirm the synergistic effect between the adsorptive capability of ZIF-11 and the photocatalytic activity of TiO 2 , which operate in complementary ways. This study highlights a MOF-semiconductor heterostructure engineering strategy as an effective route for developing high-performance photocatalysts for the sustainable treatment of organic pollutants. • ZIF-11/TiO 2 heterojunction formed via simple dispersion-mixing method. • Structural integrity of ZIF-11 preserved after TiO 2 integration. • Composite forms a Z-scheme heterojunction between ZIF-11 and TiO 2 . • Z11T8 achieved 99.92 % indigo carmine degradation under UV light.
Wahyuningsih et al. (Fri,) studied this question.