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
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National Natural Science Foundation of China(2087610020736004)+3 种基金State Key Lab.of Multiphase Complex Systems of the Chinese Academy of Science(No.2006-5)State Key Laboratory Of Coral Conversion of CAS(2006-902)Post-doctoral Science Fundation of Jiangsu Prov.,National Post-doctoral Science Fundation(20090451176)Commission of Science and Technology of Suzhou Municipality(YJS0917,SG0978)~~
