Detection And Degradation Of Preferred Controlled Pollutants In Water Using Fe₃O₄@Au Nanoparticles

Preferred controlled pollutants were selected as the object because their potential danger to natural environment. Due to the potential toxicity, carcinogenicity, mutagenicity, also bioaccumulation, they would lead to great harm and potential threats to natural biological, ecological environment and human health. The research of preferred controlled pollutants has become a hot spot in environment system.Before traditional identification and quantification, arigorous sample pre-treatment is generally required using expensive instruments. Thus it was urgent to develop a rapid, sensitive and simple detection technology. In addition the morphology change during the development also provided a new method of water treatment.The present study accomplished the syntheses of Fe3O4@Au nanoparticles and achieved the Surface enhanced Raman Scattering detection and degradation of preferred controlled pollutants in water:(1) Syntheses of Fe3O4@Au nanoparticles and characterizationFe3O4 nanoparticles were reduced by hydro-thermal method. Au0 was reduced on surface of Fe3O4 nanoparticles. The successfully syntheses was proved by the characterization of TEM/HR-TEM, SEM-EDS, XRD and VSM.(2) Facile detection of preferred controlled pollutants by SERS sensor based on the Fe3O4@Au substrateBased on the strong adsorption of Fe3O4 nanoparticles and SERS enhancement of gold nanoparticles, Fe3O4@Au nano-substrate was prepared. The detection limits of phenol and aniline were lower than 10-5 mol/L.(3) Facile degradation of preferred controlled pollutants using Fe3O4@Au nano-particlesFe3O4@ Au nanoparticles were using as the catalyst because of the high containment of noble metal and its magnetism. The absorption ware happened when mix the Fe3O4@ Au nanoparticles and analyst. NaBH4 was employed as the reductant which can lead to the degradation immediately. Besides, Fe3O4@ Au catalyst can be used several times after separated from the solution using magnet.In this study, we established the new methods to detect and degrade the preferred controlled pollutants in water, basing on Fe3O4@ Au nano-particles. The results were acceptable and hoping to use in environmental sample analyzing...