一种制备高比表面积LaOBr的新方法  

Preparation of High-Surface-Area LaOBr by Novel Method

作　　者：牛建荣[1] 邓积光[1] 王国志[1] 戴洪兴[1] 何洪[1] 邱文革[1] 訾学红[1] 

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

出　　处：《中国稀土学报》2006年第z2期46-49,共4页Journal of the Chinese Society of Rare Earths

基　　金：北京市教委科技发展计划重点项目;北京市自然科学基金(B类)重点项目(KZ200610005004)

摘　　要：采用以十六烷基三甲基溴化铵(CTAB)为模板剂和溴源的新型溶胶-凝胶法制备了LaOBr纳米粒子,考察了制备过程中灼烧温度、反应介质、沉淀过程及水热过程等因素对产物LaOBr物理性质的影响,并利用X射线衍射、比表面积测定和高分辨扫描电镜等技术进行了表征。结果表明,所得LaOBr样品均为单相四方结构,形貌为羽毛状,比表面积最高可达26 m2.g-1以上。LaOBr nanoparticles were prepared by using a novel sol-gel method with hexadecyltrimethylammonium bromide as template and bromine source.The effects of calcination temperature,reaction media,and precipitation and hydrothermal processes on the physical properties of the product LaOBr were examined.Techniques such as X-ray diffraction,BET surface area measurements and high-resolution scanning electron microscopy were employed to characterize these materials.It is found that the received LaOBr samples are single phase and possess tetragonal crystal structure and feather-shaped morphology with the surface area up to 26 m^2·g^(-1).

关 键 词：溴氧化镧 十六烷基三甲基溴化铵 溶胶-凝胶法 水热晶化 稀土 

分 类 号：O643[理学—物理化学]