改性γ-Al_2O_3纳米颗粒的制备  

Preparation of the modified nanostuctural γ-Al_2O_3 particles

作　　者：陈蒙[1] 王树林[2] 李生娟[2] 徐波[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海理工大学材料与科学工程学院,上海200093

出　　处：《功能材料》2015年第10期10123-10127,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51402192);国家教育部博士点基金资助项目(20113120110005);上海市科委纳米专项资助项目(1052nm02900)

摘　　要：在由机械研磨2 h的Al粉经超声波作用下发生水解反应、干燥、焙烧后制备Al2O3的过程中,用蔗糖、研磨13 h的Zn粉和Ag+分别作为辅助剂制得具有高比表面积的γ-Al2O3,并考察改性后对γ-Al2O3织构的影响。采用X射线衍射仪(XRD)、场发射扫描电子显微镜(SEM)和比表面测定(BET)等技术对介孔纳米γ-Al2O3样品进行表征。结果表明,γ-Al2O3不但具有高的比表面积,而且孔径分布较为集中。通过改变蔗糖的用量、Zn粉纳米颗粒和Ag+,在一定程度上对γ-Al2O3的比表面积和孔结构等进行调控。Mesoporous nanostuctural γ-Al2O3 was prepared from aluminum nanoparticles with sucrose,Zn powder grinded and Ag+respectively as auxiliary agent by precipitation with the aid of ultrasonic dispersion,drying,calcination. Textural Properties of the modification γ-Al2O3 was explored. The γ-Al2O3 were characterized by XRD,SEM and BET. The result indicated that,a novel and simple method using sucrose Zn powder grinded and Ag+as assistant agent was developed to prepare γ-Al2O3 with high surface area and narrow pore size distribution.

关 键 词：超声化学 介孔纳米γ-Al2O3 改性 织构 

分 类 号：O647.3[理学—物理化学]