【摘要】 本文通过溶剂热法制备了粒径较均匀的磁性Fe₃O₄粒子,后利用喷雾干燥技术在其表面包覆了一层碳,采用溶胶—凝胶过程在碳层上包覆一层介孔结构的氧化硅,得到了磁性核/介孔壳结构的复合材料。氮气吸附脱附测试显示所得复合材料具有较高的孔容和比表面积。更多还原

【Abstract】 Solvothermal?method was adopted to prepare uniform Fe₃O₄ magnetic nanoparticles.Then Carbon was deposited on Fe₃O₄ by spray-drying process.Mesoporous silica was deposited on the Fe₃O₄ core by sol-gel method.Core-shell structured magnetic mesoporous composites was obtained.The results showed that the composites possess relatively large pore volume and specific surface area.更多还原