文献类型：期刊文献

中文题名：Laminar Mesoporous Structure of Modified Montmorillonite Clays and Its Formation Mechanism

英文题名：Laminar mesoporous structure of modified montmorillonite clays and its formation mechanism

作者：Zhang, Ying[1,2]; Chen, Aiping[2]; Li, Chunzhong[2]; Luo, Meifang[2]; Xu, Zhenliang[1]

机构：[1] Key Laboratory for Untrafine Materials of the Ministry of Education, East China University of Science and Technology, Shanghai 200237, China; [2] Chemical Engineering Research Center, East China University of Science and Technology, Shanghai 200237, China

年份：2012

卷号：27

期号：2

起止页码：321

中文期刊名：Journal of Wuhan University of Technology(Materials Science)

外文期刊名：Journal Wuhan University of Technology, Materials Science Edition

收录：CSTPCD;;EI(收录号：20122315101070);Scopus

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)

语种：英文

中文关键词：Zr-pillared clay; ultrasonic method; Ce; ＂corrugationlike＂ structural model

外文关键词：Thermodynamic stability - Cerium - Rare earths - Silicates

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. ? Wuhan University of Technology and Springer Verlag Berlin Heidelberg 2012.