| Fe3O4 has some disadvantages:small particle size, high specific surface energy and dipole effect between nanoparticles, which will lead to reunite and oxidize without treatment. Carbon uses as a common material for encapsulated for Fe3O4.Composite material is not only retained the excellent properties of Fe3O4, but also increased the special surface area with encapsulated amorphous carbon. Through ultra-spray pyrolysis method, we synthesize Fe3O4@C nanomaterial. Based on the previous research, it has been applied in the lithium ion battery and water pollution treatment. Specific results as follows:?1?Electrochemical property:when the reaction temperature is 800? and the adding Na2CO3 is 1mol, the property is better than the others' reaction conditions. This material possesses a BET surface area of 55.96 m2·g-1 and total volume of 0.133 cm3·g-1.The Fe3O4@C material exhibits a markedly improved cycling performance with a reversible capacity of 710.4mAh·g-1 at a current rate at 0.2A, exceeding Fe3O4 and pure C. The Fe3O4@C exhibits an excellent cycle performance and a high reversible capacity of 475.3mAh·g-1 at a current rate at 1A.?2? Absorption oil property:when the reaction temperature is 800? and the adding Na2CO3 is 1mol, the absorption property is better than other conditions. The amout of saturated absorption quantity of Fe3O4@C for cyclohexane, benzene, toluene, corn oil,92# gasoline,0# diesel is 6.448,9.532,8.262,8.881,8.912 and 8.71g·g-1.?3? Absorption dye property:when the reaction temperature is 500? and the adding Na2CO3 is 1mol, Fe3O4@C has a good absorption for dye water solution. Compared with Fe3O4@nSiO2@mSiO2 absorbent, the amout of saturated absorption quantity of Fe3O4@C for RhB and MB dye aqueous solution is 165.9 and 300.75mg·g-1, higher than the Fe3O4@nSiO2@mSiO2 saturated absorption for dye aqueous solution with 112.4 and 235.1mg·g-1.After simple regeneration adsorption experiments, the quantity of absorption reaches more than 80% of the initial after six-time recycle. |
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