| 中空球状Fe3O4颗粒的合成及对刚果红溶液吸附-脱附能力的研究 |
| Synthesis of Hollow Fe3O4 Submicrospheres and Their Adsorption-Desorption Capability for Congo Red |
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| 摘要: 通过简单的水热过程合成具有优良磁学性能的中空Fe3O4单晶颗粒。空心球状颗粒外部直径约500 nm，内径约200 nm，是由粒径为50 nm的颗粒团聚而成。随着反应时间的增加，相邻的Fe3O4纳米晶沿着(311)晶面取向团聚，经过奥斯瓦尔德熟化过程最终形成中空的球状颗粒。实验合成的Fe3O4粒子表现出特殊的磁学性能，具有相对较低的饱和磁化强度和较高的矫顽力。通过对刚果红溶液的吸附-脱附实验证明，中空结构Fe3O4颗粒对刚果红溶液有更高的吸附和脱附能力，在废水处理过程中，采用Fe3O4作为吸附剂，可以更高效的去除溶解的有机污染物，同时可以回收再利用，提高废水净化率，也进一步扩展了磁性材料的应用领域。 |
| 关键词: 磁性材料 化学合成 晶体生长 微观结构 吸附-脱附 |
| 基金项目: |
| Abstract: Hollow Fe3O4 single crystal particles with excellent magnetic properties can be synthesized by simple solvothermal process. Hollow spherical particles is reunited by particle size of 50 nm, the outsider diameter of which is about 500 nm and the inside diameter is about 200 nm. With the increasing of reaction time, the near Fe3O4 nanometer crystals directed reunited following the crystal face (311). Finally it formed the Hollow spherical particles after Oswald ripening process. The Fe3O4 particles composited by experiment show special magnetic properties which have relatively low saturation magnetization and high coercivity. According to the Congo red solution adsorption-desorption experiments, hollow Fe3O4 particles have higher adsorption and desorption. Using Fe3O4 as Adsorbent in Wastewater treatment process can remove the dissolved organic pollutants more efficiently. At the same time, it can also recollect, improve the waste water purification rate and expand the applications of magnetic materials. |
| Keywords: magnetic materials chemical synthesis crystal growth microstructure adsorption-desorption |
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| 赵明月,金松哲,吴 化,段连峰.中空球状Fe3O4颗粒的合成及对刚果红溶液吸附-脱附能力的研究[J].无机化学学报,2012,28(10):2186-2192. |
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