TiO_2/累托石复合材料的制备及其光催化性能研究  

Study on preparation and photoactivity of TiO_2/rectorite nanocomposites

作　　者：肖江蓉[1] 彭天右[1] 柯丁宁[1] 蔡苹[1] 彭正合[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《功能材料》2007年第7期1110-1113,1118,共5页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2006AA032344);国家自然科学基金资助项目(20573078);湖北省杰出人才基金资金项目(2006ABB003);湖北省自然科学基金资助项目(2004ABA083)

摘　　要：以溶胶-凝胶法制备的TiO2溶胶为柱撑液制备了TiO2/累托石复合材料。以X射线粉未衍射(XRD)、透射电镜(TEM)、漫反射光谱(DRS)及液氮吸附等手段对其进行了表征;并以罗丹明B(RB)作为模拟有机污染物,研究其吸附及光催化降解性能。结果表明,和表面吸附TiO2粒子共存于复合材料中的柱撑TiO2将层间域从2.42nm扩展到9.81nm,提高了复合材料的比表面积以及孔体积,从而改善其吸附能力及光催化活性。TiO2-pillaring solution was prepared via sol-gel process by using Ti（OBu）4 as a precursor.The TiO2/Rectorite nanocomposites were produced by introducing the TiO2-pillaring solution into the rectorite suspensions.The obtained nanocomposites were characterized by X-ray diffraction,transmission electron microscopy,diffuse reflection spectra,and N2 adsorbtion-desorbtion experiments.The absorption property and photoactivity of the obtained nanocomposites were investigated by using Rhodamine B（RB） as the simulation organic contamination.Experimental results indicated that TiO2/Rectorite nanocomposites included TiO2 pillared into the intergallery of layered structures and TiO2 nanoparticles adsorbed on the surface of composites,and the pillared TiO2 expanded the d-spaces of rectorite from 2.42-9.81nm.Moreover,this expanded intergallery regions lead to enlarge the special surface areas and pore volumes of the composites,consequently,improve the absorption property and photoactivity of the Rectorite.

关 键 词：累托石 二氧化钛 光催化降解 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程] X703[环境科学与工程—环境工程]