文献类型：期刊文献

英文题名：Laminar Mesoporons Structure of Modified Montmorillonite Clays and Its Formation Mechanism

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

机构：[1]E China Univ Sci & Technol, Chem Engn Res Ctr, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Key Lab Untrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2012

卷号：27

期号：2

起止页码：321

外文期刊名：JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000302504000027)】；

基金：Funded by the National Basic Research Program of China(No. 2004CB719501) and the PetroChina Company Limited for Science Technology Venue Innovation Program(No. 050511-3-2)

语种：英文

外文关键词：Zr-pillared clay; ultrasonic method; Ce; "corrugation-like" structural model

摘要：Zr-pillared clays were prepared by heating and ultrasonic methods in intercalation process. The resultants were characterized by XRD, N-2 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.