玉米秸秆-蒙脱士纳米复合材料的制备及表征

Preparation and Characterization of Corn Stalk/montmorillonite Nanocomposite

将经NaOH预处理的玉米秸秆（CS）与蒙脱土（MMT）复合，制备出插层聚合型CS／MMT纳米复合材料，采用X射线衍射（XRD）、扫描电镜（SEM）、红外光谱（FTIR）、比表面及平均孔径（BJH）进行结构表征，结果表明，CS大分子插层进入到了MMT的片层结构中，使MMT的晶格结构遭到破坏，形成了有利于对Pb^2＋离子吸附的插层聚合型纳米复合材料，且所制备CS／MMT纳米复合材料的粒径远小于MMT，可用于废水中重金属Pb^2＋的处理。在室温下，复合反应时间为4h，NaOH溶液的质量浓度为8％，CS与MMT的掺杂比例为1：1，为最佳制备条件并能达到最佳吸附效果。

The nanocomposite was prepared by the corn stalk and montmorillonite which were dealed with NaOH. The nanocomposite adsorption performance of Pb^2＋ was investigated and BJH. The results showed that the corn stalk macromolecules intercalated XRD,SEM,FTIR nto interlayer of montmorillonite and destroyed the crystalline structure of montmorillonite and then formed intercalation-polymeric nanocomposite material, which was propitious to the adsorption of Pb^2＋ ion. The corn stalk nanocomposite particle size was much smaller than the montmorillonite, which could be used in treating heavy metal Pb^2＋ in wastewater. And the optimum synthesis conditions of the nanocomposite was the mass ratio of 1：1at the NaOH concentration of 8% at room temperature for 4 hours.