| SO2-4/ZrO2/Fe3O4/Al2O3磁性固体超强酸的制备与表征 |
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| 引用本文： | 王君,范美青,杨飘萍,于微,景晓燕,张密林,刘天孚,段雪.SO2-4/ZrO2/Fe3O4/Al2O3磁性固体超强酸的制备与表征[J].物理化学学报,2007,23(4):595-600. |
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| 作者姓名： | 王君 范美青 杨飘萍 于微 景晓燕 张密林 刘天孚 段雪 |
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| 作者单位： | School of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China; Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, P. R. China |
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| 基金项目： | 国家自然科学基金;黑龙江省科技攻关项目;黑龙江省哈尔滨市科研项目;哈尔滨工程大学校科研和教改项目 |
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| 摘 要： | 用化学共沉淀法制备了一系列SO2-4/ZrO2/Fe3O4/Al2O3磁性固体超强酸, 利用XRD、IR、TG-DSC、VSM、TEM及HRTEM等手段对样品结构进行了表征. 结果表明, 引入一定量的Fe3O4和Al2O3有利于四方晶相ZrO2(t)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 结果显示ZrO2晶体生长趋向于ZrO2(t)的101]方向,其(101)晶面间距为d(101)=0.29 nm, 与XRD 衍射结果一致. Hammett 指示剂测得样品SZA-20-200-800酸强度(H0<-13.8)最强, 酸性大于浓硫酸(H0=-11.9).
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| 关 键 词： | 化学共沉淀法 固体酸 超顺磁性 四方晶相 |
| 收稿时间： | 2006-09-20 |
| 修稿时间： | 2006-09-20 |
Preparation and Characterization of Magnetic Solid Superacid SO42-/ZrO2/Fe3O4/Al2O3 |
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| WANG Jun,FAN Mei-Qing,YANG Piao-Ping,YU Wei,JING Xiao-Yan,LIU Tian-Fu,DUAN Xue,ZHANG Mi-Lin.Preparation and Characterization of Magnetic Solid Superacid SO42-/ZrO2/Fe3O4/Al2O3[J].Acta Physico-Chimica Sinica,2007,23(4):595-600. |
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| Authors: | WANG Jun FAN Mei-Qing YANG Piao-Ping YU Wei JING Xiao-Yan LIU Tian-Fu DUAN Xue ZHANG Mi-Lin |
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| Institution: | School of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China; Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, P. R. China |
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| Abstract: | A novel magnetic solid superacid SO_4~(2-)/ZrO_2/Fe_3O_4/Al_2O_3 was prepared by a co-precipitation method. The physiochemical properties of the materials were characterized by XRD, IR, TG-DSC, TEM, and HRTEM techniques. The results indicated that the crystallization temperature of the materials shifted to higher temperature with the increase of Al_2O_3 and Fe_3O_4 content. The introduction of Al_2O_3 and Fe_3O_4 increased the temperature corresponding to the phase transformation, Fe_3O_4 also endowed this solid superacid a super-paramagnetic feature. TEM results indicated that the crystal grew along 101] direction of ZrO_2(t). The superacid SZA-20-200-800 has a maximum acid strength (H0<-13.8) measured by Hammett indicator method, indicating that it is a stronger acid than concentrated H_2SO_4 (H0=-11.9). |
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| Keywords: | Co-precipitation Solid acid Superparamagnetism Tetragonal phase |
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