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Recent advances in preparation and applications of pillared clay materials



Recent advances in preparation and applications of pillared clay materials



Kuangwu Yanshi Diqiuhuaxue Tongbao = Bulletin of the Chinese Society of Mineralogy, Petrology and Geochemistry 21(4): 242-246



In present paper, the recent advances and present situation in preparations and applications of PILCs have been summarized. Using layered clays, especially naturally abundant montmorillonite (MMT) as starting host, porous pillared clay materials can be synthesized by intercalation of a variety of polyoxocation such as aluminum Keggion ions [Al (sub 13) O (sub 4) (OH) (sub 24) ] (super 7+) and tetrameric [Zr (sub 4) (OH) (sub 14) ] (super 2+) and silicon oglimers. As novel catalytic materials, the PILCs have demonstrated extensive possibility of applications in solid acid-based catalysis or oxidation-reduction catalysis. Through adjusting and optimizing the procedure during preparation, the structure, thermal stability and catalytic performance of PILCs can be improved. It should be noted that with recent use of surfactant-pretreated or acid-treated montmorillonite, the pore structure and performances of PILCs are adjustable and controllable. A new approach to designing porous clay materials is based on the use of intercalated Quaternary ammonium cations and neutral amines as co-surfactants to direct the interlamellar hydrolysis and condensation polymerization of neutral inorganic precursor within the galleries of an ionic lamellar solid. The resulting materials have larger pore sizes bridging between supermicropore and mesopore. The novel method affords a new prospect and direction for design of pillared clay materials.

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Accession: 019857380

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