物理化学学报 >> 1993, Vol. 9 >> Issue (03): 336-344.doi: 10.3866/PKU.WHXB19930311

研究论文 上一篇    下一篇

铁铝复合柱撑粘土的制备、酸性与表征(II)

赵东源; 杨亚书; 郭燮贤; 陈恒荣; 辛勤; 王国甲   

  1. 中国科学院大连化学物理研究所,大连 116023;吉林大学化学系,长春 130023
  • 收稿日期:1991-11-02 修回日期:1992-05-18 发布日期:1993-06-15
  • 通讯作者: 赵东源

Preparation,Characterization and Surface Acidity of Hydroxy-Fe-Al Pillared Clays Containing Mixed-matal Complexes(II)

Zhao Dong-Yuan; Yang Ya-Shu; Guo Xie-Xian; Chen Heng-Rong; Xin Qin; Wang Guo-Jia   

  1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023; Department of Chemistry, Jilin University, Changchun 130023
  • Received:1991-11-02 Revised:1992-05-18 Published:1993-06-15
  • Contact: Zhao Dong-Yuan

摘要: 用UV-DRS、Mossbauer谱、XPS、程序升温还原(TPR)等技术对新型铁铝复合柱撑粘土(FeAl-PILC)进行了表征, 用IR、吡啶吸附IR、正丁胺吸附-TPD手段, 考察了其表面羟基和酸性. 结果表明, 层间柱铁铝聚合物中铁-铝间存在着相互作用. Fe/Al比<0.5时, 相互作用强, 铁的分散度大, 难还原. Fe/Al≥0.5时, 相互作用较弱, 易还原, 焙烧后易生成α-Fe_2O_3s. 随Fe/Al的增加, 其表面酸性逐渐减弱.

关键词: 柱撑粘土, 表征, 酸性, 相互作用

Abstract: Hydroxy-Fe-Al Pillared Clays (FeAl-PILC)containing mixed-metal complexes with various Fe/Al ratios were characterized by UV-DRS, Mossbauer spectrascopy, XPS, TPR measurement. The surface hydroxyl and acidity were determined by IR, Py-IR and TPD. The results have shown that iron in the pillars relatively stronger interacts with alumina in the pillars than with silica of interlayer. The interaction is stronger in FeAl-PILC with Fe/Al ratio<0.5 than that with Fo/Al ratio>0.5. The surface acidity is decreased with increasing of Fe/Al ratio.

Key words: Pillared clay, Characterization, Acidity, Interaction