不同钛源中孔分子筛Ti-MCM-41的合成、表征及催化氧化性能  

Systhesis, Characterization and Catalytic Oxidation Performance of Ti-MCM-41 Mesoporous Molecular Sieve from Different Titanium Source

作　　者：唐晓红[1] 李保军[2] 郑会勤[1] 李成未[1] 

机构地区：[1]河南教育学院化学系,河南郑州450046 [2]郑州大学化学系,河南郑州450001

出　　处：《非金属矿》2012年第2期53-57,共5页Non-Metallic Mines

基　　金：河南省科技攻关重点项目(112102310424)

摘　　要：在敞开体系中,分别以TiCl3和TiCl4为钛源,工业用水玻璃为硅源,三甲基十六烷基溴化铵(CTAB)为模板剂、H2SO4为pH值调节剂,合成出了不同钛源不同硅钛摩尔比的中孔分子筛Ti-MCM-41;并利用X射线衍射(XRD)、红外光谱(FT-IR)、紫外-可见光谱(UV-Vis)和孔结构测定对所合成的样品进行了表征;考察了不同钛源不同钛含量对Ti-MCM-41结构和催化氧化性能的影响。结果表明:在本实验的合成条件下,用TiCl3和TiCl4为钛源都能合成出具有六方介孔结构、良好长程有序性和结晶度的中孔分子筛Ti-MCM-41,但要合成高钛含量、高度有序、高水热稳定性和高催化氧化活性的Ti-MCM-41中孔分子筛,不宜以TiCl4为钛源。The mesoporous molecular sieve Ti-MCM-41 was synthesized by using silica from water glass of industry,titanium respectively from TiCl3 and TiCl4,H2SO4 for adjusting the pH value of the slurry and CTAB as template in an open-vessel.The characterization of its crystal order and framework titanium was carried out by means of X ray diffraction（XRD）,fourier transform infrared spectrometer（FT-IR）,visiblespectroscopy（UV-Vis） and mensuration of pore structure.The influence of different titanium source and titanium content on the structure and catalytic oxidation performance of Ti-MCM-41 was investigated.The results showed that under the synthetic conditions of this experiment,Ti-MCM-41 with hexagonal mesoporous structure,good long-range order and crystallinity can be synthesized both by TiCl3 and TiCl4.But it is not suitable for obtaining Ti-MCM-41 with high titanium content,highly ordered,high hydrothermal stability and high catalytic oxidative activity using titanium from TiCl4.

关 键 词：敞开体系 中孔分子筛 合成 表征 钛 

分 类 号：TQ426.4[化学工程]