物理化学学报 >> 1993, Vol. 9 >> Issue (02): 193-199.doi: 10.3866/PKU.WHXB19930210

研究论文 上一篇    下一篇

铁铝复合柱撑粘土的制备、柱结构和稳定性(I)

赵东源; 杨亚书; 郭燮贤; 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:1993-04-15
  • 通讯作者: 赵东源

Preparation,Pillarinc Structure and Thermal Stability of Hydroxy-Fe-Al Pillared Clays Containing Mixed-Metal Complexes(I)

Zhao Dong-Yuan; Yang Ya-Shu; Guo Xie-Xian; Wang Guo-Jia   

  1. Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023; Department of Chemistry, Jilin University, Changchun 130023
  • Received:1991-11-02 Revised:1992-05-18 Published:1993-04-15
  • Contact: Zhao Dong-Yuan

摘要: 用两种方法合成了一系列不同Fe/Al比的铁铝复合柱撑牯土(FeAl-PlLC). 用~(27)Al-NMR、UV、ESR等手段考察了柱溶液的结构和状态, 用XRD、DTA、UV-DRS 等技术对其结构、稳定性进行了研究. 结果表明, 铁铝柱撑粘土的底面间距为1.98~1.55 nm, Fe/Al比对其柱结构、比表面积、热稳定性均有较大影响. Fe/Al<0.5时, 层间柱主要呈现Keggin结构, Fe/Al≥0.5时, 可能为三聚结构. 随Fc/Al比的增加, d(001)值, 比表面面、热稳定性逐渐下降.

关键词: 柱撑粘土, 表征, 稳定性

Abstract: A series of Hydroxy-Fe-Al Pillared Clays (FeAl-PILC) containing mixed-metal complexes with various Fe/Al ratios were prepared by two methods. The structure of the pillaring solution was studied by ~(27)Al-NMR, UV, ESR. The structure and thermal stability of the pillared clays were determined by XRD, DTA, UV-DRS. The results suggest that the basal spacings are 1.98—1.55 nm. The pillaring structure, surface area and thermal stability of FeAl-PILC are greatly affected by Fe/Al ratios in pillaring solution, FeAl-PILC products with Fe/Al ratio<0.5 have the pillaring structure the pillaring structure similar to that of Al-PILC, but FeAl-PILC products with Fe/Al ratio>0.5 have the pillaring structure similar to that of Fe-PILC. The basal spacings, surface area and thermal stability decrease with increasing of Fe/Al ratio.

Key words: Pillared Clay, Characterization, Stability