高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

以松木为模板研制高比表面积MgO固体强碱

孙瑞琴, 周徐, 孙林兵, 吴昊, 淳远, 须沁华   

  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
  • 收稿日期:2007-08-16 修回日期:1900-01-01 出版日期:2007-12-10 发布日期:2007-12-10
  • 通讯作者: 淳远

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

SUN Rui-Qin, ZHOU Xu, SUN Lin-Bing, WU Hao, CHUN Yuan*, XU Qin-Hua   

  1. Key Laboratory of Mesoscopic Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
  • Received:2007-08-16 Revised:1900-01-01 Online:2007-12-10 Published:2007-12-10
  • Contact: CHUN Yuan

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被引次数

22

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.

关键词: 松木模板, MgO, 高比表面积, 纳米材料, 固体碱

Abstract: 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.

Key words: Pinewood template, MgO, High specific surface area, Nanomaterials, Solid base

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