Preparation and Application of Bi-metal Pillared Montmorillonite

The bi-metal pillared montmorillonite is an important type of the pillared montmorillonite. It has applicationprospects in both adsorption and catalysis. This paper reviews the preparation of the pillaring agent, the approach of thepillared montmorillonite as well as the application in catalysis and adsorption. The long preparation period, the unsatisfactorythermal and hydrothermal stability and the uneven distribution of pores are the major problems. In future studies, the multi-metal pillared structure or the introduction of rare earth metals, the mechanism, the retationship between structure andproperties and the preparation of high-performance, multifunctional montmorillonite materials are the main subjects.