钛掺杂磁铁矿吸附去除水中亚甲基蓝的研究

用一种新的合成方法在水相中合成了钛磁铁矿(Fe3-xTixO4),并用XRD和FTIR对已合成的Fe3-xTixO4进行了表征。结果表明:合成的Fe3-xTixO4为立方晶系尖晶石结构,样品中的钛离子都已经进入Fe3-xTixO4晶格中,且Fe3-xTixO4表面羟基量随着钛掺杂量的增加而增加。随后,以亚甲基蓝为模拟染料污染物,考察了Fe3-xTixO4的吸附性能。实验表明:钛掺杂能够显著促进Fe3-xTixO4对亚甲基蓝的吸附,吸附反应在0.5h内就能达到吸附平衡。

Removal of methylene blue by Ti-doped magnetite(Fe3-xTixO4)

In this study,a series of Fe3-xTixO4(0≤x≤0.78)were synthesized using a novel soft chemical method.The synthetic Fe3-xTixO4 was characterized using XRD and FTIR.The results show that synthetic Fe3-xTixO4 has a spinel structure and Ti was introduced into its structure.The introduction of Ti into magnetite structure increases the amounts of hydroxyl(—OH)on the surface of Fe3-xTixO4.Then,the synthetic Fe3-xTixO4 was used as absorbents for the removal of methylene blue(MB)from solution.The experimental results indicate that with the increase of Ti in Fe3-xTixO4,the absorption of MB on Fe3-xTixO4was promoted remarkably and the absorption reached the equilibrium within 0.5 hour.