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选用对空气和人居环境具有污染的悬铃木果毛为基质,通过将四氧化三铁磁性纳米粒子在多巴胺改性悬铃木果毛表面的固载,制备得到具有中空结构的Fe_3O_4@改性悬铃木果毛复合吸附材料。用X射线衍射仪(XRD)、能谱(EDS)、电子扫描电镜(SEM)、红外光谱(FT-IR)和震动样品磁强计(VSM)等手段对样品进行了表征和分析,考察了Fe_3O_4@改性悬铃木果毛复合中空纤维对亚甲基蓝的吸附性能。结果表明:通过多巴胺对悬铃木果毛的化学改性,有效促进了反尖晶石型结构的四氧化三铁纳米粒子在其表面的固载,Fe_3O_4@改性悬铃木果毛复合中空纤维直径约为25.8μm,其饱和磁化强度为12.51 emu/g,Fe_3O_4@改性悬铃木果毛对亚甲基蓝的吸附在140 min达到平衡,吸附容量可达12.6 mg/g,吸附动力学符合准二级动力学。
By using the pollens of Platanus trichocarpa which are polluted with air and human living environment as the matrix, the Fe_3O_4 @ modified venereal hair with hollow structure was prepared by immobilizing the ferroferric oxide magnetic nanoparticles on the surface of the modified epidermis Composite adsorbent material. The samples were characterized and analyzed by XRD, EDS, FT-IR and VSM. The effects of Adsorption properties of Fe_3O_4 @ modified sycamore hollow fiber to methylene blue. The results showed that the chemical modification of the epidermis of A. veneris by dopamine effectively promoted the immobilization of antiferrous oxide nanoparticles on the surface of the suspension. The diameter of composite hollow fiber of the suspension of Fe3O4 @ The saturation magnetization was 12.51 emu / g. The adsorption of methylene blue on Fe 3 O 4 @ modified fruit reached the equilibrium at 140 min, and the adsorption capacity reached 12.6 mg / g. The adsorption kinetics was in accordance with quasi-second order kinetics.