Synthesis of molybdenum disulfide/covalent organic frameworks composite for efficient solar-driven hydrogen production and pollutant degradation

•MoS2 linked hydrazone-based COF as a new composite material for enhanced photocatalysis.•Improved hydrogen evolution and Rhodamine B dye degradation over the newly fabricated composite material.•Improved photoactivity is due to the promoted charge carrier's separation in the fabricated composite material. Covalent organic frameworks (COFs) are recently recognized photocatalysts with outstanding performance in photocatalysis. Typically, COFs exhibit significant hydrogen evolution activity in the presence of noble metal co-catalysts. Nevertheless, due to their insufficient availability and high cost, it is essential to replace noble metal co-catalysts with cost-effective and abundant alternatives. Herein, we have substituted noble metal co-catalyst with MoS2 and designed MoS2 linked hydrazone-based COF composite for exceptional photocatalysis. Various characterization techniques provide evidence that the MoS2/COF composite has been successfully synthesized. The as-synthesized MoS2/COF photocatalyst exhibited a hydrogen production rate of 115 µmol·g‒1h‒1 and achieved 98 % degradation of Rhodamine B (RhB) dye under visible light irradiation for 2 h The photoluminescence (PL) spectra show that the correlation between MoS2 and COF improves charge carrier's separation rate and minimizes recombination, thereby enhancing photocatalytic activity. This study aims to broaden the application of hydrazone-based COFs composites in energy production and environmental remediation. [Display omitted]