水热改性对氧化铝载体织构和表面性质的影响  

The Effect of Hydrothermal Modification on the Texture and Surface Properties of Alumina Support

作　　者：李俊诚[1] 向兰[1] 冯旭[1] 汪展文[1] 魏飞[1] 

机构地区：[1]清华大学化学工程系,北京100084

出　　处：《无机化学学报》2005年第2期212-216,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.50174532);清华大学实验室开放基金资助项目

摘　　要：The alumina support was treated in the moderate aqueous hydrothermal condition to avoid from the excess growth of boehmite (AlOOH) crystals which usually results in the obvious decrease of the specific surface area (BET). The experimental results indicated that the hydrothermal treatment of the alumina support at 140 ℃ for 2 hours promoted the formation of the plate-like AlOOH crystallites on the surface of the support via dissolution-precipitation route. The occurrence of the nano plate-like structure led to the improvement in the structural and surface properties, such as the increase of the specific surface area, the surface hydroxyl concentration and the surface acidity.The alumina support was treated in the moderate aqueous hydrothermal condition to avoid from the excess growth of boehmite (AlOOH) crystals which usually results in the obvious decrease of the specific surface area (BET). The experimental results indicated that the hydrothermal treatment of the alumina support at 140 degreesC for 2 hours promoted the formation of the plate-like AlOOH crystallites on the surface of the support via dissolution-precipitation route. The occurrence of the nano plate-like structure led to the improvement in the structural and surface properties, such as the increase of the specific surface area, the surface hydroxyl concentration and the surface acidity.

关 键 词：水热改性 氧化铝载体 表面性质 织构 BET 

分 类 号：O643.12[理学—物理化学] TQ132.2[理学—化学]