فهرست نشریات علمی دسترسی آزاد ایران

The development of efficient photocatalysts capable of simultaneously adsorbing and degrading emerging water pollutants remains a critical challenge in environmental remediation. In this work, a novel two-dimensional CuSmBTC/ZnS nanosheet composite was synthesized via a liquid–liquid interfacial strategy and evaluated for the removal of methylene blue (MB) dye and tetracycline (TC) antibiotic under visible-light irradiation. Structural and morphological characterization by XRD, FTIR, FESEM, TEM, BET, and TGA confirmed successful formation of a bimetallic MOF nanosheet framework uniformly decorated with ZnS quantum dots (~9.5 nm). Diffuse reflectance spectroscopy revealed bandgap narrowing and enhanced visible-light absorption after ZnS integration. The composite exhibited outstanding adsorption capacity and photocatalytic performance, achieving nearly 100% MB degradation and 90.1% TC removal within 60 min under optimized conditions, outperforming individual components. Kinetic analysis followed pseudo-first-order behavior, and recyclability tests demonstrated good stability over five cycles. The enhanced activity is attributed to synergistic effects between the porous MOF nanosheets and ZnS nanoparticles, which promote efficient charge separation, increased active surface area, and strong pollutant adsorption. This study highlights the potential of interracially engineered MOF/semiconductor hybrids as low-dose, high-efficiency photocatalysts for water purification applications.