水热法改性凹凸棒石及其吸附性能的研究  

Synthesis of organic modified palygorskite by hydrothermal method and its adsorption property

作　　者：朱王勇[1] 章燕[1] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009

出　　处：《应用化工》2010年第4期487-490,共4页Applied Chemical Industry

基　　金：国家自然科学基金(50774027);高校优秀青年人才基金(2009SQRZ015)

摘　　要：分别以葡萄糖和淀粉为碳前驱体，凹凸棒石为原料，水热法制备有机改性凹凸棒石。通过扫描电镜（SEM）、红外吸收光谱（FTIR）、X射线衍射（XRD）以及吸附性能，考察葡萄糖和淀粉对凹凸棒石的形貌和性能的影响。结果表明，在制备改性凹凸棒石的过程中，碳前驱体对产物形貌和吸附性能有着明显的影响。葡萄糖分子在水热条件下碳化为直径50nm碳颗粒，均匀负载在凹凸棒石表面，复合材料中含有-CH有机官能团；淀粉碳化为直径40～80nm的碳球，不均匀的负载在凹凸棒石的表面，且表面含有-CH有机官能团。采用葡萄糖和淀粉为碳源的有机改性凹凸棒石对苯酚的去除率分别为70％和46％，分别是纯凹凸棒石对苯酚去除率的4倍和2．5倍。Organic modified palygorskite was prepared with glucose and starch as carbon precursors by hy- drothermal method. The samples were analyzed using scanning electron microscopy, infrared spectroscopy, X-ray diffraction and adsorption properties. The results indicated that carbon precursors have an effect on the structure and property of palygorskite. When the glucose is used as carbon source, uniform nanocarbon was coated on the surface of palygorsktie with diameter of 50 nm. The composite material contains -CH groups. While the starch is used as carbon source, the nanocarbon is loaded onto the palygorskite crystal surface and the nanoparticle diameter is about 40 - 80 nm. With glucose and starch as carbon precursor, the removal rate of phenol from palygorskite/carbon was 70% and 46%, respectively. The adsorption efficiency of composite material is 4 and 2.5 times higher than that of natural palygorskite, respectively.

关 键 词：有机改性凹凸棒石 葡萄糖 淀粉 吸附 苯酚 

分 类 号：TQ170.9[化学工程—硅酸盐工业]