LAUSR

CoS2–CuS nanocomposites were synthesized through a simple ultrasound-assisted sol–gel technology facilely. The preparation of CoS2–CuS on cellulose fiber was carried out successfully. The microstructure, surface morphology and the optical properties of the as-synthesized catalyst samples had been considered with the XRD, SEM, UV–Vis spectra and photoluminescence. The chemical states of samples were checked with XPS. The mean crystallite sizes of CuS nanoparticles, CoCu-1 and CoCu-1/CNF are 20.85, 44.0, and 74.14 nm, respectively. The band-gap values was found 2.18, 2.14 and 2.11 eV for CuS nanoparticles, CoCu-1 and CoCu-1/CNF, respectively. The photocatalytic properties of the sample were estimated by the degradation of ciprofloxacin and ofloxacin antibiotic with UV-light irradiation. Compared with CuS nanoparticles, CoS2–CuS, the results indicate that the as-prepared CoS2–CuS on cellulose nanocomposites display great photocatalytic properties for the photo-degradation of ciprofloxacin and Ofloxacin. The results demonstrated that the highest amount of degradation (98.11, and 88.0%) of ciprofloxacin and ofloxacin was occured in pH 5 at 60 min under UV irradiation. The high catalytic activity of the CoS2–CuS on cellulose nanocomposites can be attributed to the core–shell-liked nanostructure and the synergistic effect between the CoS2 and the CuS and also, the presence of cellulose fiber causes the surface area of the photocatalyst was improved. These investigations suggest the potential application of CoS2–CuS on cellulose nanocomposites for water purification. The results demonstrated that CoCu-1/CNF nanocomposites had great antibacterial, anti-inflammatory, antioxidant properties.