MgAl水滑石的制备及其对甲基橙的吸附

Preparation of MgAl hydrotalcite and Its Adsorption to MO

分别以硝酸镁和硝酸铝为二价和三价阳离子源,以尿素为沉淀剂,利用水热法制备MgAl水滑石化合物,通过添加不同的表面活性剂调控其结构及对甲基橙的吸附性能。采用X射线粉末衍射和红外光谱对其进行表征。实验结果表明,表面活性剂的添加能够影响其结构和吸附性能,添加一定量的十六烷基三甲基溴化铵对水滑石结构的影响较小,但能显著提高其对甲基橙的吸附性能。

The MgAl hydrotalcite was synthesized with the Mg(NO3)2·6 H2O and Al(NO3)3·9 H2O serving as the divalent and trivalent cation resources and urea serving as the precipitant.The structure and the adsorption to Methyl orange of the as-prepared samples were adjusted by the addition of different surfactants.And the samples were also characterized by XRD and FT-IR.The experimental results showed that the addition of CTAB had little effect on the structure of hydrotalcite,but can improve its adsorption capacity apparently.