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以柠檬酸铁为铁源,采用真空浸渍法和高温热分解法,在天然埃洛石纳米管(Hal)内成功负载了Fe3O4纳米粒子复合材料(A-Hal/Fe3O4),验证产物对染料分子的吸附性能提升效果。通过X射线衍射仪、Fourier转换红外光谱、X射线光电子能谱仪、透射电子显微镜以及振动样品磁强计对A-Hal/Fe3O4复合磁性材料的组成、结构、形貌、磁性进行表征,通过紫外-可见光谱检测了A-Hal/Fe3O4复合材料吸附亚甲基蓝的性能。结果表明:Fe3O4纳米颗粒已成功负载在HNTs管内,但有少量的Fe3O4表面被氧化成磁赤铁矿(γ-Fe2O3),造成样品呈黄色;制备的A-Hal/Fe3O4复合磁性材料对5 mg/L的亚甲基蓝的吸附性能良好,30 min内的吸附脱色率为98.99%;回收后再次吸附,30 min内的吸附脱色率为94.14%;相比于埃洛石原矿,A-Hal/Fe3O4产物在30 min时的脱色率提升20%以上。同时,负载在埃洛石管内的Fe3O4纳米粒子的比饱和磁化强度(Ms)可以达到4.7(A·m2)/kg,通过外加磁场的吸引作用,成功将吸附了有机染料分子的复合材料从模拟废水中快速分离。
Fe3O4 nanoparticle composites (A-Hal / Fe3O4) were successfully loaded into the natural halloysite nanotubes (Hal) by using the ferric citrate as the iron source and the vacuum impregnation method and the high temperature pyrolysis method to verify the effect of the product on the dye molecules The adsorption performance to enhance the effect. The composition, structure, morphology and magnetic properties of A-Hal / Fe3O4 composite magnetic materials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy and vibrating sample magnetometer. - Visible spectra of A-Hal / Fe3O4 composite adsorbed methylene blue performance. The results showed that the Fe3O4 nanoparticles were successfully loaded in HNTs tubes, but a small amount of Fe3O4 surface was oxidized to maghemite (γ-Fe2O3), resulting in a yellow color. The prepared A-Hal / Fe3O4 composite magnetic material had a good effect on 5 mg / L methylene blue has a good adsorption performance, the decolorization rate is 98.99% in 30 min, and the adsorption decoloration rate is 94.14% in 30 min after re-adsorption. Compared with the halloysite ore, the A-Hal / Fe3O4 product The decoloration rate increased by more than 20% at 30 min. At the same time, the specific saturation magnetization (Ms) of the Fe3O4nanoparticles loaded in the halloysite tube can reach4.7 (A · m2) / kg, and the adsorption of the organic dyemolecule into the simulated Quick separation of waste water.