TiO2/累托石复合材料的制备及其光催化性能研究

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.

Study on preparation and photoactivity of TiO2/rectorite nanocomposites

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.