固体超强酸SO_4^(2-)/ZrO_2-TiO_2的声化学制备及表征  

Sonochemical preparation and characterization of SO_4^(2-)/ZrO_2-TiO_2 solid superacid

作　　者：张学富 赵先锐[2] 陈同云[3] 

机构地区：[1]浙江东发环保工程有限公司,浙江杭州311203 [2]台州学院物理与电子工程学院,浙江台州317000 [3]安徽工业大学化学与化工学院,安徽马鞍山243002

出　　处：《工业催化》2012年第2期24-28,共5页Industrial Catalysis

摘　　要：采用超声共沉淀法制备了SO24-/ZrO2-TiO2(SZT)固体超强酸,用流动指示剂法测定酸强度,通过BET、IR、TG-DTA和XRD进行表征,并反复用于催化乙酸和乙醇的酯化反应,检验其催化稳定性。结果表明,超声共沉淀法且在-15℃陈化条件下制备的SO24-/ZrO2-TiO2固体超强酸的比表面积及酸强度大(H0≤-14.5),催化活性高,样品表面与SO24-结合较牢固,重复使用时,催化活性变化不大。SO42-/ZrO2-TiO2 solid superacid（SZT） was prepared by co-precipiation under ultrasonic radi- ation. The acidity of the samples were determined with flow indicator method. The as-prepared samples were characterized by BET,IR,TG-DTA and XRD and were reused as the catalysts for the esterification of acetic acid and ethanol in order to study their catalytic properties. The results showed that SO^-/ZrO2- TiO2 solid superacid prepared by co,precipiation under ultrasonic radiation and aged at - 15 ~C exhibited the best catalytic properties compared with other samples prepared by normal co-precipiation method, and had larger specific surface area, higher acid strength （ H0 ~〈 - 14.5 ） and catalytic activity. The surface of the sample could combine with SO42- more firmly and its catalytic activity had little change during the reuse.

关 键 词：催化化学 固体超强酸 共沉淀 超声辐射 低温陈化 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]