以松木为模板研制高比表面积MgO固体强碱  

Synthesis of High-specific-surface-area Solid Strong Base MgO with Pinewood as Exotemplate

作　　者：孙瑞琴[1] 周徐[1] 孙林兵[1] 吴昊[1] 淳远[1] 须沁华[1] 

机构地区：[1]南京大学化学化工学院介观化学教育部重点实验室,南京210093

出　　处：《高等学校化学学报》2007年第12期2333-2337,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金青年基金(批准号:20203010);南京大学开放测试基金资助

摘　　要：以松木为模板,乙酸镁为前驱物,通过外模板法制备了一系列的MgO固体碱材料,并用XRD、SEM、正己烷吸附、低温液氮吸附、Hammett指示剂法、ICP、IR和TG-DSC等手段对其进行了表征.结果表明,用该方法制备出来的MgO样品具有松木的生物形态,由横截面积比较均一的棒状纳米颗粒构成,不同于乙酸镁直接焙烧得到的MgO样品.松木模板的使用有助于降低形成MgO样品的晶粒直径并明显提高了其比表面积,与此同时,这些具有生物形态的MgO样品仍保持了较高的碱强度,可望用作优良的碱催化剂或催化剂载体.In this paper, a series of solid base MgO were synthesized via an exotemplating pathway with pinewood as the template and magnesium acetate as MgO precursor, and were characterized by XRD, SEM, adsorption of n-hexane or nitrogen, Hammett indicator, ICP, IR and TG-DSC techniques. It was found that these as-prepared MgO materials replicated the biomorph of pinewood, and their frameworks were constructed by plenty of claviform nanoparticles with a similar sectional area, which were different from those of MgO prepared by directly thermal decomposition of MgO precursor. The use of pinewood template was beneficial to the formation of the smaller crystalline size and higher specific surface area. These biomorphic MgO materials exhibit a strong basicity, and can be used as effective basic catalysts or supports.

关 键 词：松木模板 MGO 高比表面积 纳米材料 固体碱 

分 类 号：O643[理学—物理化学]