Synthesis and characterization of Fe₃O₄ and CdTe quantum dots anchored SnO₂ nanofibers and SnO₂ nanospheres for degradation and removal of two carcinogen substance

The Fe₃O₄ quantum dots anchored SnO₂ nanofibers (Fe₃O₄ QDs/SnO₂ NFs) and CdTe quantum dots anchored SnO₂ nanospheres have been prepared via hydrothermal method. The characteristic structure of Fe₃O₄ QDs/SnO₂ NFs and CdTe QDs/SnO₂ NSs was analyzed using several techniques such as X-ray diffraction, transmission and scanning electron microscopy, UV–Vis and photoluminescence spectroscopy, and N₂ adsorption–desorption instruments. The average diameters of Fe₃O₄QDs/SnO₂ NFs and CdTe QDs/SnO₂ NSs were 7.25 and 3.75 nm, respectively. BET surface area of Fe₃O₄QDs/SnO₂ NFs and CdTe QDs/SnO₂ NSs has been found 53.064 and 148.59 m²/g, respectively. The Fe₃O₄ QDs/SnO₂ NFs and CdTe QDs/SnO₂ NSs sample were used for removal and photo-catalytic of carcinogenic compounds such as ethyl methanesulfonate (EMS) and N-nitrosonornicotine (NNN). The Fe₃O₄ QDs/SnO₂ NFs and CdTe QDs/SnO₂ NSs demonstrates up to 90 and 56% photo degradation and adsorption activity against EMS and NNN solution, respectively. Additionally, cytotoxicity test indicated that the prepared catalyst has low cytotoxic influences. The antibacterial activity of prepared catalyst has excellent effect against Staphylococcus aureus, and Pseudomonas aeruginosa.