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Citation: WANG Jun, FAN Mei-Qing, YANG Piao-Ping, YU Wei, JING Xiao-Yan, ZHANG Mi-Lin, LIU Tian-Fu, DUAN Xue. Preparation and Characterization of Magnetic Solid Superacid SO^2-₄/ZrO₂/Fe₃O₄/Al₂O₃[J]. Acta Physico-Chimica Sinica, ;2007, 23(04): 595-600. doi: 10.3866/PKU.WHXB20070428 shu

Preparation and Characterization of Magnetic Solid Superacid SO^2-₄/ZrO₂/Fe₃O₄/Al₂O₃

1.
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

Received Date: 20 September 2006
Available Online: 9 March 2007

A novel magnetic solid superacid SO2-4/ZrO2/Fe3O4/Al2O3 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 Al2O3 and Fe3O4 content. The introduction of Al2O3 and Fe3O4 increased the temperature corresponding to the phase transformation, Fe3O4 also endowed this solid superacid a super-paramagnetic feature. TEM results indicated that the crystal grew along [101] direction of ZrO2(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 H2SO4 (H0=-11.9).
- Co-precipitation; Solid acid; Superparamagnetism; Tetra nal phase
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Preparation and Characterization of Magnetic Solid Superacid SO2-4/ZrO2/Fe3O4/Al2O3

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通讯作者: 陈斌, bchen63@163.com

Preparation and Characterization of Magnetic Solid Superacid SO^2-₄/ZrO₂/Fe₃O₄/Al₂O₃