磁性固体超强酸SO_4^(2-)/ZnO/ZrO_2/Fe_3O_4的制备研究  

Study on the synthesis of magnetic solid superacid SO_4^(2-)/ZnO/ZrO_2/Fe_3O_4

作　　者：何洋 孙炜岩[2] 仲崇娜 张艳[1] 刘琦[1] 刘天孚 王君[1] 

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001 [2]内蒙古工业大学化工学院,内蒙古呼和浩特010051

出　　处：《化学工程师》2009年第8期4-8,共5页Chemical Engineer

基　　金：黑龙江省科技攻关资助项目(G202A423);哈尔滨市科学研究基金(2008RFQXG028);哈尔滨工程大学基础研究基金(HEUF04072)

摘　　要：用化学共沉淀法制备了一系列SO42-/ZnO/ZrO2/Fe3O4磁性固体超强酸,利用XRD、TG-DSC、VSM、SEM、TEM及HRTEM等手段对样品结构进行表征。结果表明:引入一定量的Fe3O4和ZnO,有利于四方晶相t-ZrO2结构的稳定;Fe3O4超细粒子的引入,使固体超强酸具备了超顺磁性;HRTEM显示ZrO2晶体生长趋向于m-ZrO2的[101]方向,其[101]晶面间距为d(101)=0.29nm,与XRD衍射结果一致。Hammett指示剂测得样品SZZ-1-25-600酸强度最强为Ho<-13.8,酸性大于浓H2SO4(Ho=-11.93)。A novel magnetic solid superacid SO4^2-/ZnO/ZrO2/JFe3O4 was prepared by co-precipitation. The physiochemical properties of the materials were characterized by means of XRD, TG-DSC, SEM, TEM and HRTEM techniques. The results indicate that the crystallization temperature of the materials shifts to higher temperature with increasing ZnO and Fe304 content. The introduction of ZnO and Fe3O4 delays the transition from t- ZrO2 to m-ZrO2. The introduction of Fe3O4 also endows this solid superacid a super-paramagnetic feature. TEM resuits indicate that the crystal grows along [101] direction of t-ZrO2, the sample SZZ-1-25-600 was estimated to have Ho 〈 -13,8. The superacid that is stronger than Ho = -11.93, which corresponds to the acid strength of 100% H2SO4, is known as a acid.

关 键 词：化学共沉淀法 固体酸 超顺磁性 四方晶相 

分 类 号：O652.61[理学—分析化学]