摘要
简述了层柱粘土矿物材料研究与应用的现状和进展。利用粘土矿物蒙脱石作母体,通过大体积的铝、锆、硅等交联剂插层可制成层柱多孔材料,在酸催化、氧化还原催化中均有十分广阔的应用前景。研究表明,改进制备工艺后可提高层柱蒙脱石的热稳定性、比表面积和催化活性;通过酸或表面活性剂等预处理,再进行粘土的支撑,可以调节和控制层柱粘土的结构与性能;采用有机改性和模板导向等技术,可获得孔径介于大微孔和中孔之间的新型层柱粘土矿物材料,并应用于大分子催化反应与吸附,为粘土矿物材料的合成和应用开辟了新方向。
In present paper, the recent advances and present situation on 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 7+ and tetrameric 2+ and silicon oglimers. As novel catalytic materials, the PILCs have demonstrated extensive possibility of applications in solid acidbased catalysis or oxidationreduction 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 recently using surfactantpretreated or acidtreated montmorillonite, the pore structure and performances of PILCs are adjustable and controllable. Especially a new approach to designing porous clay materials is based on the use of intercalated quaternary ammonium cations and neutral amines as cosurfactants 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.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2002年第4期242-246,共5页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
浙江省自然科学基金资助项目(201057)
关键词
层柱粘土
蒙脱石
中孔材料
催化
吸附
比表面积
pillared layered clays
montmorillonite
porous materials
catalysis and adsorption
