Superacid Catalyst SO4^2-/ZrO2-La2O3 Prepared by Ultrasonic Co-precipitation and Low Temperature Aging  

低温陈化超声波共沉淀制备SO4^2-/ZrO2-La2O3催化剂

作　　者：陈同云[1] 储向峰[1] 胡克良[2] 

机构地区：[1]安徽工业大学化学与化工学院,马鞍山243002 [2]中国科学技术大学结构分析中心,合肥230026

出　　处：《Chinese Journal of Chemical Physics》2009年第3期322-326,340,共6页化学物理学报（英文）

摘　　要：Sulfated zirconia-lanthana （SO4^2-/ZrO2-La2O3） precursors were prepared by ultrasonic coprecipitation method and followed by aging at different temperature. The precursors were treated by 0.5 mol/L H2SO4. Samples of SO4^2-/ZrO2-La2O3 nano-crystalline catalysts were obtained by baking the treated precursors at different temperatures. The acidic properties of SO4^2-/ZrO2-La2O3 were tested by the Hammett indicator method. The phase composition, specific area, particle structure, and surface state were characterized by X-ray diffraction, BET, transmission electron microscopy, infrared spectrum, and X-ray photoelectron spec- troscopy. The catalytic activities were estimated by esterification of acetic acid with glycerin. It was shown that the catalyst prepared by ultrasonic stirring and low temperature （-15 ℃） exhibited highly active sites and high catalytic property.

关 键 词：SUPERACID SO4^2-/ZrO2-La2O3 PREPARATION ULTRASONIC 

分 类 号：O614.241[理学—无机化学] TB559[理学—化学]