Mesoporous magnetic Fe304@C nanoparticles have been synthesized by a one-pot approach and used as adsorbents for removal of Cr （IV） from aqueous solution. Magnetic iron oxide nanostructured materials encapsulated by...Mesoporous magnetic Fe304@C nanoparticles have been synthesized by a one-pot approach and used as adsorbents for removal of Cr （IV） from aqueous solution. Magnetic iron oxide nanostructured materials encapsulated by carbon were characterized by scanning electron microscope （SEM）, nitrogen adsorption and desorption, X-ray diffraction （XRD） and Fourier transform infrared （FTIR） spectroscopy. The adsorption performance of the nanomaterial adsorbents is tested with the removal of Cr （IV） from aqueous solution. The results reveal that the mesoporous magnetic Fe304@C nanospheres exhibit excellent adsorption efficiency and be easily isolated by an external magnetic field. In comparison with magnetic Fe304 nanospheres, the mesoporous magnetic Fe304@C exhibited 1.8 times higher removal rate ofCr （VI）. The mesoporous structure and an abundance of hydroxy groups on the carbon surface may be responsible for high absorbent capability.展开更多
Novel magnetic Fe3O4@C@MgAl-layerecl double-hydroxide（LDH） nanoparticles have been successfully prepared by the chemical self-assembly methods.The properties of surface functional groups,crystal structure,magnetism ...Novel magnetic Fe3O4@C@MgAl-layerecl double-hydroxide（LDH） nanoparticles have been successfully prepared by the chemical self-assembly methods.The properties of surface functional groups,crystal structure,magnetism and surface morphology of magnetic nanoparticles were characterized by Fourier transform infrared spectroscopy（FT-IR）,X-ray diffraction（XRD）,thermal gravity-differential thermal gravity（TG-DTG）,scanning electron microscopy（SEM）,and transmission electron microscopy（TEM）.The adsorption studies of the novel adsorbent in removing heavy metals Cr（Ⅵ） from waste water showed that the maximum absorption amount of Cr（Ⅵ） was 152.0 mg/g at 40℃ and pH 6.0.The excellent adsorption capacity of the Fe3O4@C@MgAl-LDH nano-absorbents plus their easy separation,environmentally friendly composition and reusability makes them more suitable adsorbents for the removal of metal ions from waste water.展开更多
基金supported by the Open Fund of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(No. PLN1132)in China,Scientific Research Fund of Sichuan Provincial Education Department and Scientific Research Foundation of the Southwest Petroleum University of China
文摘Mesoporous magnetic Fe304@C nanoparticles have been synthesized by a one-pot approach and used as adsorbents for removal of Cr （IV） from aqueous solution. Magnetic iron oxide nanostructured materials encapsulated by carbon were characterized by scanning electron microscope （SEM）, nitrogen adsorption and desorption, X-ray diffraction （XRD） and Fourier transform infrared （FTIR） spectroscopy. The adsorption performance of the nanomaterial adsorbents is tested with the removal of Cr （IV） from aqueous solution. The results reveal that the mesoporous magnetic Fe304@C nanospheres exhibit excellent adsorption efficiency and be easily isolated by an external magnetic field. In comparison with magnetic Fe304 nanospheres, the mesoporous magnetic Fe304@C exhibited 1.8 times higher removal rate ofCr （VI）. The mesoporous structure and an abundance of hydroxy groups on the carbon surface may be responsible for high absorbent capability.
基金supported by Scientific Research Starting Project of SWPU(No.2014QH013)Open Fund of state key laboratory of Oil & Gas reservoir geology and exploitation(No.PLN1126)major cultivation project of Sichuan Provincial Department of Education Science and Technology Achievement Transformation(No. 14CZ0005)
文摘Novel magnetic Fe3O4@C@MgAl-layerecl double-hydroxide（LDH） nanoparticles have been successfully prepared by the chemical self-assembly methods.The properties of surface functional groups,crystal structure,magnetism and surface morphology of magnetic nanoparticles were characterized by Fourier transform infrared spectroscopy（FT-IR）,X-ray diffraction（XRD）,thermal gravity-differential thermal gravity（TG-DTG）,scanning electron microscopy（SEM）,and transmission electron microscopy（TEM）.The adsorption studies of the novel adsorbent in removing heavy metals Cr（Ⅵ） from waste water showed that the maximum absorption amount of Cr（Ⅵ） was 152.0 mg/g at 40℃ and pH 6.0.The excellent adsorption capacity of the Fe3O4@C@MgAl-LDH nano-absorbents plus their easy separation,environmentally friendly composition and reusability makes them more suitable adsorbents for the removal of metal ions from waste water.
