化学学报 ›› 2011, Vol. 69 ›› Issue (23): 2807-2811.DOI: 10.6023/A1105104 上一篇    下一篇

研究论文

乙二胺和聚乙二醇在纳米介孔氧化铝制备中的协同导向作用

孙允凯1,2, 肖新荣1, 阳鹏飞1, 孙中溪*,2   

  1. (1南华大学化学化工学院 衡阳 421001)
    (2济南大学化学化工学院 济南 250022)
  • 投稿日期:2011-05-10 修回日期:2011-07-22 发布日期:2011-08-15
  • 通讯作者: 孙中溪 E-mail:sunzx@ujn.edu.cn
  • 基金资助:

    应用纳米技术去除饮用水中微污染物的基础研究;超细粒铜、铅、锌金属氧化矿物表面硫化络合研究

Co-Templating Role of EDA and PEG in Synthesis of Mesoporous Alumina

Sun Yunkai1,2; Xiao Xinrong1; Yang Pengfei1; Sun Zhongxi*,2   

  1. (1 School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001)
    (2 School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022)
  • Received:2011-05-10 Revised:2011-07-22 Published:2011-08-15
  • Contact: Zhong-Xi SUN E-mail:sunzx@ujn.edu.cn

以无机铝盐Al(NO3)3为原料, 以乙二胺和聚乙二醇为协同模板导向剂, 与氨水反应, 经过“沉淀-超声-煅烧”等过程, 制得介孔纳米氧化铝. 用TEM, XRD, N2吸附-脱附等测试技术对样品进行了测试和表征. 研究结果表明, 所得样品具有相当高的比表面积(510 m2•g-1)、较大孔容(1.13 cm3•g-1)和较为集中的孔径(5.8 nm)分布. 根据乙二胺和氧化铝表面的溶液化学反应及在不同pH条件下的溶液组分分布, 探讨了它们在介孔氧化铝制备过程中的协同模板作用机理.

关键词: 乙二胺, 介孔氧化铝, 协同模板

Nano-scale mesoporous alumina powder (γ-Al2O3) was synthesized by a precipitation-ultrasonic treatment-calcination method using aluminum nitrate and ammonia solution as raw materials and ethyl diamine (EDA)/polyethyleneglycol (PEG) as co-template agents. The samples were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), N2 adsorption-desorption and acid-base titration methods. The results showed that the samples can be transformed into nano-sized mesoporous γ-Al2O3 with needle or rodlike morphology, centralized pore size distribution and stable structure. The average pore size, pore volume and specific surface area of the obtained sample were 5.8 nm, 1.13 cm3•g-1 and 510 m2•g-1 respectively. A co-templating mechanism of EDA and PEG in the synthesis of mesoporous alumina was discussed based on the chemical reactions and speciation of EDA and alumina surfaces as a function of pH in aqueous solution.

Key words: ethyl diamine, mesoporous alumina, co-template