Laminar Mesoporous Structure of Modified Montmorillonite Clays and Its Formation Mechanism  

作　　者：张颖 陈爱平 

机构地区：[1]Key Laboratory for Untrafine Materials of the Ministry of Education,East China University of Science and Technology [2]Chemical Engineering Research Center,East China University of Science and Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2012年第2期321-327,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Basic Research Program of China(No.2004CB719501);the PetroChina Company Limited for Science Technology Venture Innovation Program(No.050511-3-2)

摘　　要：Zr-pillared clays were prepared by heating and ultrasonic methods in intercalation process. The resultants were characterized by XRD, N2 adsorption-desorption, SEM, and TG/DTA analysis. Ultrasonic technology accelerated the pillaring process effectively and obtained better ordered structure than by heating method. The specific surface area and pore volume of the Zr-pillared clays increased by about 13 and 3 times respectively. Rare earth metal （Ce） was introduced into Zr-pillared clays by co-intercalation and dipping method. The specific surface area was increased by co-intercalation approach, but it was decreased dramatically by dipping method. Thermal stability of Ce modified samples prepared by co-intercalation method was enhanced in comparison with Zr-pillared clays. Modification mechanism and ＂corrugation-like＂ structural mode of intercalation process was proposed basing on the double XRD peaks in small-angle range of pillared clays, which was related to the deformation of silicate layer.Zr-pillared clays were prepared by heating and ultrasonic methods in intercalation process. The resultants were characterized by XRD, N2 adsorption-desorption, SEM, and TG/DTA analysis. Ultrasonic technology accelerated the pillaring process effectively and obtained better ordered structure than by heating method. The specific surface area and pore volume of the Zr-pillared clays increased by about 13 and 3 times respectively. Rare earth metal （Ce） was introduced into Zr-pillared clays by co-intercalation and dipping method. The specific surface area was increased by co-intercalation approach, but it was decreased dramatically by dipping method. Thermal stability of Ce modified samples prepared by co-intercalation method was enhanced in comparison with Zr-pillared clays. Modification mechanism and ＂corrugation-like＂ structural mode of intercalation process was proposed basing on the double XRD peaks in small-angle range of pillared clays, which was related to the deformation of silicate layer.

关 键 词：Zr-pillared clay ultrasonic method CE ＂corrugationlike＂ structural model 

分 类 号：O611.3[理学—无机化学]