蠕虫状介孔γ-Al_2O_3的合成与表征  

Synthesis and Characterization of Wormhole-like Mesoporousγ-Al_2O_3

作　　者：张磊[1] 戴洪兴[1] 卢鑫悦[1] 王国志[1] 何洪[1] 

机构地区：[1]北京工业大学环境与能源工程学院催化化学与纳米科学研究室,北京100022

出　　处：《北京工业大学学报》2008年第7期750-754,共5页Journal of Beijing University of Technology

基　　金：国家自然科学基金(No.20473006)资助项目;北京市属市管高等学校"拔尖创新人才计划"资助项目

摘　　要：为了制备高比表面积的多孔γ-Al_2O_3,采用醇-水热法合成了虫孔状介孔面心立方晶体结构的γ-Al_2O_3片状粒子,并利用X-射线衍射、N_2吸附-脱附、扫描电镜、透射电镜和选区电子衍射等技术表征了所得氧化铝粒子的物理性质.实验结果表明,以异丁醇铝为铝源,正丙醇水溶液作溶剂,月桂酸作模板剂(异丁醇铝与月桂酸的质量比为4:1)的醇-水热合成法可制备出具有较好结晶度和虫孔状介孔γ-Al_2O_3粒子,经600℃灼烧后所得样品的比表面积高达306m^2/g,其平均孔径为5nm.To obtain high-surface-area porous γ-Al2O3, the alco-hydrothermal method was adopted to synthesize plate-shaped wormhole-like mesoporous γ-Al2O3 particles with a face-centered cubic crystal structure, and characterized the physical properties of these materials by means of the X-ray diffraction, N2 adsorption-desorption, scanning electron microscopy, transmission electron microscopy, and selected area electron diffraction techniques. It has been shown that mesoporous γ-Al2O3 particles with the wormhole-like morphology and good crystalinity can be fabricated with aluminum tri-sec-butoxide as the aluminum source, 1- propanol aqueous solution as the solvent, and lauric acid as the template （the mass ratio of aluminum tri-secbutoxide to lauric acid = 4 ： 1）. The surface area of the Al2O3 sample obtained at 600℃ calcination was up to 306 m^2/g and its average pore diameter was ca. 5 nm.

关 键 词：活性氧化铝 表面活性剂 水热合成 虫孔状结构 介孔材料 

分 类 号：O643.36[理学—物理化学]