Aqueous dispersion and stability of Fe304 nanoparticles remain an issue unresolved since aggregation of naked iron nanoparticles in water. In this study, we successfully synthesized different Fe304 super-paramagnetic ...Aqueous dispersion and stability of Fe304 nanoparticles remain an issue unresolved since aggregation of naked iron nanoparticles in water. In this study, we successfully synthesized different Fe304 super-paramagnetic nanoparticles which were modified by three kinds of materials [DSPE-MPEG2000, TiO2 and poly acrylic acid （PAA）] and further detected their characteristics. Trans- mission electron microscopy （TEM） clearly showed sizes and morphology of the four kinds of nanopar- ticles. X-ray diffraction （XRD） proved successfully coating of the three kinds of nanoparticles and their structures were maintained. Vibrating sample magnetometer （VSM） verified that their magnetic proper- ties fitted for the super-paramagnetic function. More importantly, the particle size analysis indicated that Fe304@PAA had a better size distribution, biocompatibility, stability and dispersion than the other two kinds of nanoparticles. In addition, using CNE2 cells as a model, we found that all nanoparticles were nontoxic. Taken together, our data suggest that Fe304@PAA nanoaparticles are superior in the applica- tion of biomedical field among the four kinds ofFe304 nanoparticles in the future.展开更多
Magnetic powder resin Q150 with high specific surface area of 1074 m2/g was prepared by the membrane emulsificationsuspension polymerization technique. Adsoption of tetracycline on the obtained sorbent Q150 was evalut...Magnetic powder resin Q150 with high specific surface area of 1074 m2/g was prepared by the membrane emulsificationsuspension polymerization technique. Adsoption of tetracycline on the obtained sorbent Q150 was evaluted by using the granule resin （GR） XAD-4, the powder activated carbon （PAC） 1240AC and the granule activated carbon （GAC） HD4000 for comparison. It was found that Q150 had a larger adsorption capacity, faster kinetic and easier regeneration under alkaline condition. The results suggested that the powder resin （PR） Q150 would be a promising sorbent for removing antibiotics and even other organic micropollutants from the aquatic environment.展开更多
基金supported by the National Natural Science Foundation of China(No.81172121)
文摘Aqueous dispersion and stability of Fe304 nanoparticles remain an issue unresolved since aggregation of naked iron nanoparticles in water. In this study, we successfully synthesized different Fe304 super-paramagnetic nanoparticles which were modified by three kinds of materials [DSPE-MPEG2000, TiO2 and poly acrylic acid （PAA）] and further detected their characteristics. Trans- mission electron microscopy （TEM） clearly showed sizes and morphology of the four kinds of nanopar- ticles. X-ray diffraction （XRD） proved successfully coating of the three kinds of nanoparticles and their structures were maintained. Vibrating sample magnetometer （VSM） verified that their magnetic proper- ties fitted for the super-paramagnetic function. More importantly, the particle size analysis indicated that Fe304@PAA had a better size distribution, biocompatibility, stability and dispersion than the other two kinds of nanoparticles. In addition, using CNE2 cells as a model, we found that all nanoparticles were nontoxic. Taken together, our data suggest that Fe304@PAA nanoaparticles are superior in the applica- tion of biomedical field among the four kinds ofFe304 nanoparticles in the future.
基金support provided by Program for Changjiang Scholars Innovative Research Team in University and NSFC(Nos.50938004,50825802 and 51178215)Jiangsu Nature Science Fund For Distinguished Scientists(Nos.BK2010006 and BK2011032) China
文摘Magnetic powder resin Q150 with high specific surface area of 1074 m2/g was prepared by the membrane emulsificationsuspension polymerization technique. Adsoption of tetracycline on the obtained sorbent Q150 was evaluted by using the granule resin （GR） XAD-4, the powder activated carbon （PAC） 1240AC and the granule activated carbon （GAC） HD4000 for comparison. It was found that Q150 had a larger adsorption capacity, faster kinetic and easier regeneration under alkaline condition. The results suggested that the powder resin （PR） Q150 would be a promising sorbent for removing antibiotics and even other organic micropollutants from the aquatic environment.
