Ti-Co-SBA-15的制备、表征及其选择氧化催化性能  

Preparation,Characterization and Catalytic Performance of Ti-Co-SBA-15 Catalysts

作　　者：张金峰[1,2] 张积耀[1] 赵建社[1] 张存社[2] 沈寒晰[2] 周魁[2] 

机构地区：[1]合成与天然功能分子化学教育部重点实验室,西北大学化学与材料科学学院,西安710069 [2]陕西省石油化工研究设计院,西安710054

出　　处：《无机化学学报》2014年第5期1063-1067,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21171139;21371143);陕西省科技厅科技攻关项目(No.2013k11-07)资助项目

摘　　要：以钛酸丁酯为钛源,分子筛SBA-15为载体,采用水热法合成了一系列不同载钛量的Ti-SBA-15分子筛,用浸渍法将钴负载于其骨架结构上,得到Ti-Co-SBA-15催化剂。采用X射线、N2吸附-脱附、漫反射紫外-可见光谱和傅里叶变换红外光谱等方法对样品进行了表征,并考察了催化剂在温和条件下对叔丁基甲苯氧气氧化反应中的催化性能。结果表明,所制备的催化剂样品具有较大的比表面积和孔径,钛、钴以四配位体存在,具有较高的催化活性和选择性,可获得较高的对叔丁基苯甲醛收率。A series of Ti-SBA-15 with different titanium loadings were synthesized under conventional hydrothermal conditions, using tetra-n-butyl titanate as the titanium source. The Ti-Co-SBA-15 catalysts were synthesized by using the impregnation method. The catalyst samples were characterized using XRD, UV-Raman, FTIR, low temperature N2 adsorption-desorption. The catalytic performance of the catalysts was evaluated for oxidation of 4-tert-butyltoluene into 4-tert-butylbenzaldehyde under mild conditions. The results show that the prepared catalysts have larger surface area and pore size, and they contain four coordinated titanium and cobalt. The catalysts have higher activity, selectivity and yield of 4-tert-butylbenzaldehyde in the oxidation reaction of 4 tert-buty]toluene.

关 键 词：Ti-Co-SBA-15分子筛 对叔丁基甲苯 选择氧化 对叔丁基苯甲醛 

分 类 号：O643[理学—物理化学]