Fabrication of CuMoS decorated WO nano heterojunction embedded on chitosan: Robust photocatalytic efficiency, antibacterial performance, and bacteria detection by peroxidase activity.

In this study, the CuMoS/WO supported on chitosan was prepared by precipitation method, and applied to photocatalyst, antibacterial agent and biosensor. The presence of WO and CuMoS crystals were confirmed by XRD analysis. The elemental information was investigated by EDS. FTIR spectra shows the presence of chitosan in nanocomposites. The as-synthesized CuMoS/WO/Chitosan nanocomposites has a bandgap of 2.18 eV and it is effective for visible light condition. The average particle size of the CuMoS/WO/Chitosan is 71 nm. The photocatalysis activity CuMoS/WO/Chitosan was higher than CuMoS or WO.The CuMoS/WO/Chitosan nanocomposites shows the highest efficiency (100%) in photocatalysis degradation of dye under visible light irradiation in 80 min. The •O plays a main role in degradation process. The as-synthesized CuMoS/WO/Chitosan nanocomposites depicted the antibacterial activity toward G+/- bacteria. Determination of enterococcus faecalis is important for human health. The DNA template was used to the CuMoS/WO/Chitosan nanocomposites and applied in detection of enterococcus faecalis by HO and 3,3',5,5' -tetramethylbenzidine in peroxidase like activity. The detection limit of enterococcus faecalis by DNA-CuMoS/WO/Chitosan in peroxidase-like catalysis was about 55 CFU/mL. Therefore, the CuMoS/WO/Chitosan can be applied in the photocatalysis, bactericidal and peroxidase process.