Controlling Pore Size and its Distribution of γ-Al_2O_3 Nanofiltration Membranes

作     者：Rong Chun XIONG, Xiao Dong LEI, Gang WEI Beijing University of Chemical technology, Beijing 100029 

作者机构：Beijing Univ. of Chemical Technology Beijing 100029 China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2003年第14卷第9期

页      面：969-972页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：National Key Technologies R&D Programme Item(2002BA313B01) 

主　　题：Nanofiltration γ-Al2O3 membrane membrane pore size N2 absorption-desorption test. 

摘      要：The preparation process of γ-A12O3 nanofiltration membranes were studied by N2 absorption and desorption test and retention rate vs thickness gradient curve method. It was found that template and thermal treatment were key factors for controlling pore size and its distribution. Under the optimized experimental conditions, the BJH (Barret-Joyner-Halenda) desorption average pore diameter, BJH desorption cumulative volume of pores and BET (Brunauer-Emmett-Teller) surface area of obtained membranes were about 3.9 nm, 0.33 cm3/g and 245 m2/g respectively, the pore size distribution was very narrow. Pore size decreased with the increasing of thickness and no evident change after the dense top layer was formed. The optimum thickness can be controlled by retention rate vs thickness gradient curve method.