磁性聚膦腈纳米管对亚甲基兰的吸附性能研究

Research on adsorption characteristics of magnetic polyphosphazene nanotubes to methylene blue

采用原位模板法在室温下合成了贯穿型磁性聚膦腈纳米管,研究了该磁性聚膦腈纳米管对有机染料亚甲基兰的吸附作用。分别讨论了吸附时间、吸附温度、亚甲基兰的初始浓度及磁性聚膦腈纳米管用量对吸附性能的影响。结果表明,合成的含11.5%Fe3O4的贯穿型磁性聚膦腈纳米管的比磁饱和强度Ms为2.68A.m2/kg,磁响应性强烈,分散在水中后可通过钕铁硼永久磁铁迅速富集;吸附率随吸附时间的延长逐渐增大,72h时几乎可吸附完全;吸附行为较好地符合Langmuir模型;吸附率随亚甲基兰初始浓度的增加而减小,随磁性聚膦腈纳米管用量的增加而增加;吸附率和吸附量随温度的升高而增大,在60℃时,几乎吸附完全。

Magnetic polyphosphazene nanotubes with magnetic phases embedded in the walls were synthesized via an in situ template approach at room temperature.The magnetic phosphazene nanotubes in application of adsorbing methylene blue were studied.The effects such as adsorption time,adsorption temperature,the initial concentration of methylene blue and the amount of magnetic phosphazene nanotubes on the adsorption property were discussed.The results showed that the magnetic phosphazene nanotubes with magnetism content of 11.5% and magnetization saturation value of 2.68A·m2/kg exhibited strong magnetic responsivity and could be quickly concentrated by magnet after being dispersed in the water.Moreover,the adsorption behaviour basically followed Langmuir model.The adsorption ratio increased with the time and the amount of magnetic phosphazene nanotubes,and decreased with the initial concentration of methylene blue.The adsorption capacity and ratio increased with temperature and the adsorption behaviour was almost finished at 60℃.