拟薄水铝石制备的中孔氧化铝的热稳定性研究  

A study on thermal stability of mesoporous alumina prepared by pseudo-boehmite

作　　者：卞龙春[1] 赵云昆 蒋峰芝[1] 袁波[1] 王继亮[1] 

机构地区：[1]云南大学化学科学与工程学院,云南昆明650091 [2]昆明贵研催化剂有限责任公司,云南昆明650106

出　　处：《云南大学学报（自然科学版）》2013年第6期797-801,共5页Journal of Yunnan University(Natural Sciences Edition)

基　　金：云南大学理工科校级科研资助项目(2011YB11)

摘　　要：介绍了一种用工业原料拟薄水铝石快速合成中孔氧化铝的方法,并对合成的中孔氧化铝热稳定性进行研究,通过加入氧化镧和氧化钡对合成的中孔氧化铝进行改性.利用氮气吸附-脱附仪及X射线衍射分析仪对样品的性能进行表征,比表面分析结果表明经过1 050℃老化后,空白中孔氧化铝的比表面积为91 m2/g,而经氧化镧和氧化钡改性的中孔氧化铝样品的比表面积分别为127 m2/g和109 m2/g,经XRD分析知,老化后样品表面生成了镧铝酸盐和钡铝酸盐,从而阻止了中孔氧化铝内部孔结构的坍塌.In this paper, were explored and worked out a quick synthesis approach to forming mesoporous a lumina by using Pseudo - boehmite. In addition, the process of adding lanthanum oxide and barium oxide into me soporous alumina on the effects of the thermal stability of the mesoporous alumina has been investigated. The as synthesized samples have been characterized by BET and XRD. The analysis results show that the BET of meso porous alumina prepared reaches 91 m2/g after aging at 1 050 ℃ While the BET of modified samples by rare earth and alkaline -earth element are 127 m2/g and 109 m2/g respectively. In the light of the result of XRD, the formation of LaAIO4 and BaA12 04 has prevented mesoporous alumina from sintering and transforming into α - alu mina at 1 050 ℃.

关 键 词：中孔氧化铝 拟薄水铝石 氧化镧 氧化钡 

分 类 号：TB35[一般工业技术—材料科学与工程]