Adsorption and photocatalysis efficiency of magnetite quantum dots anchored tin dioxide nanofibers for removal of mutagenic compound: Toxicity evaluation and antibacterial activity.

The Magnetite FeO quantum dots anchored SnO nanofibers (FeO QDs/SnO NFs) have been synthesized using the facile one step hydrothermal method. The characteristic structure of synthesized FeO QDs/SnO NFs was analyzed using X-ray diffraction, Transmission electron Microscopy, Scanning electron microscopy, UV-vis diffuse reflectance, photoluminescence spectroscopy, and N adsorption-desorption instrumental techniques. The crystallites size of FeOQDs/SnO NFs was 7.0nm. The average diameters of FeOQDs/SnO NFs were 7.25nm. BET surface area of FeOQDs/SnO NFs has been found 53.064m/g. The activity of FeO QDs/SnO NFs samples were compared towards adsorption and degradation of mutagenic compound such as Ethyl methanesulfonate (EMS). The FeO QDs/SnO NFs demonstrates 93.85% and 56.85% photo degradation and adsorption activity towards 10ppm EMS solution in 30 and 40min, respectively. FeO QDs/SnO NFs shows maximum removal of EMS at pH5. Additionally, cytotoxicity test showed that the newly developed catalyst has low cytotoxic effects on three kinds of human cells. The antibacterial activity evaluation against two bacterials, including Staphylococcus aureus (ATCC 43300), and Pseudomonas aeruginosa (ATCC 27853) was considered. It was found that the MIC values for the antibacterial assay in the presence of FeO QDs/SnO NFs were around 0.38mM with 83.4, and 85.5% inhibition for the S. aureus, and P. aeruginosa bacterial strains, respectively.