Microstructure of Hydroxy-Al Pillared Montmorillonite

Journal of Inorganic Materials

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Microstructure of Hydroxy-Al Pillared Montmorillonite

WU Ping-Xia; ZHANG Hut-Fen; GUO Jiu-GaO; WANG Fu-Ya; LIU Xian-Yong⁺

Guangzhou Institute of Geochemistry; Chinese Academy of Sciences Guangzhou 510640 China;⁺State key Laboratory of solid microstructure physics; Nanjing University Nanjing 210093 China

Received:1998-03-02 Revised:1998-04-02 Published:1999-02-20 Online:1999-02-20

Abstract

Abstract: The pillared montmorillonite was prepared by Al³⁺ in Keggin ions which has Keggin structure.²⁷Al NMR was used to monitor the environment of Al³⁺ in solution. The thermal stability ofpillared clays was determined by XRD, IR, DTA, TG and AFM. The results suggest when m=2.4 the quantity of Keggin ions in AlCl3 solution is more. In natural state, the d(001) value of pillaredmontmorillonite is 2.53urn, after calcined at 300℃, the hasal interlayer spacing is stabilized 1.83um,with high stability.

Key words: pillared montmorillonite, keggin structure, stability

CLC Number:

TQ426

WU Ping-Xia,ZHANG Hut-Fen,GUO Jiu-GaO,WANG Fu-Ya,LIU Xian-Yong. Microstructure of Hydroxy-Al Pillared Montmorillonite[J]. Journal of Inorganic Materials.

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Microstructure of Hydroxy-Al Pillared Montmorillonite

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