Abstract
Fe(OH)3 precursor sol was prepared by a sol-gel method. The precursor sol was dipped onto the absorbent cotton, and gel was formed on the absorbent cotton template after the volatilization of moisture. Fe2O3 microtubules were synthesized after the process of self-propagation or calcination. The phase, morphology, and particle diameter of the samples were examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the magnetic properties of the samples were measured using a vibrating sample magnetometer (VSM). The external diameters of Fe2O3 microtubules ranged between 8 and 13 μm, and the wall thicknesses ranged between 0.5 and 2 μm. The type of the calcination method plays a significant role in developing the Fe2O3 phase and the variation in the magnetic properties in the sol-gel template complexing method. γ-Fe2O3 was synthesized by a self-propagation method. However, α-Fe2O3 was synthesized after calcination at 400°C for 2 h. The coercivity of the samples synthesized by calcination at 400°C for 2 h after self-propagation was found to increase significantly, thereby presenting hard magnetic properties.
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Cornell R.M. and Schwertmann U., The Iron Oxides, Edited by Cornell R.M., Wiley-VCH, Weinheim, 1996: 463.
Sun H.T., Cantalini C., Faccio M., and Pelino M., Porous silica-coated α-Fe2O3 ceramics for humidity measurement at elevated temperature, J. Am. Ceram. Soc., 1996, 79(3): 927
Liu X.Q., Tao S.W., and Shen Y.S., Preparation and characterization of nanocrystalline α-Fe2O3 by a sol-gel process, Sens. Actuators B, 1997, 40(2–3): 161.
Itoh H. and Sugimoto T., Systematic control of size, shape, structure, and magnetic properties of uniform magnetite and maghemite particles, J. Colloid Interface Sci., 2003, 265(2): 283.
Rockenberger J., Scher E.C., and Alivisatos A.P., A new nonhydrolytic single-precursor approach to surfactant-capped nanocrystals of transition metal oxides, J. Am. Chem. Soc., 1999, 121(49): 11595.
Idriss H. and Seebauer E.G., Reactions of ethanol over metal oxides, J. Molec. Catal. A, 2000, 152(1–2): 201.
Denizot B., Tanguy G., Hindre F., Rump E., Jeune J., and Jallet P., Phosphorylcholine coating of iron oxide nanoparticles, J. Colloid Interface Sci., 1999, 209(1): 66.
Jing Z.H., Wang Y., and Wu S.H., Hydrothermal synthesis, characterization and magnetic studies on various morphological hematite nanopowders, Chin. J. Inorg. Chem., 2008, 62: 988.
Zhang J.G., Zhang M.F., Han J.C., and He X.D., α-Fe2O3 nanocrystallites prepared by a combustion method, J. Mater. Eng., 2001, 7: 40.
Wei Y., Liu X.L., and Zheng X.Z., Preparation of ultrafine monodispersed α-Fe2O3 hydrosol, Acta Phys. Chim. Sin., 1996, 12(6): 551.
Zhang X.L., Liu H., Wei Y., and Ma Z.C., Catalytic synthesis of spindle-type α-Fe2O3 particles in solution, Acta Chim. Sin., 2005, 63(12): 1141.
Han X.B., Huang L., and Hui Z., Microwave-hydrolysis synthesis spindle-type α-Fe2O3 particles, J. Inorg. Mater., 1999, 14(4): 669.
Hyun G.C., Chang W.K., Young H.K., and Mi H.J., Preparation and characterization of α-Fe2O3 nanorod-thin film by metal-organic chemical vapor deposition, Thin Solid Films, 2009, 517(5): 1853.
Whang D., Jin S., Wu Y., and Lieber C.M., Large-scale hierarchical organization of nanowire arrays for integrated nanosystems, Nano Lett., 2003, 3(9): 1255.
Zhan S.H., Chen D.R., Jiao X.L., and Liu S.S., Facile fabrication of long α-Fe2O3, α-Fe and γ-Fe2O3 hollow fibers using sol-gel combined co-electrospinning technology, J. Colloid. Interf. Sci., 2007, 308(1): 265.
Li Q.L., Wang Y.F., and Ye Y., Needle-like nano-SrFe12O19 particles: Preparation by sol-gel method and magnetic properties, Chin. J. Inorg. Chem., 2008, 24(6): 907.
Li Q.L., Wei Y., and Li L., Hydrolysis mechanism of ellipsoidal α-Fe2O3 before nucleation, J. Inorg. Mater., 2000, 16(4): 312.
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Chang, C., Zhang, C., Wang, W. et al. Preparation and magnetic properties of Fe2O3 microtubules prepared by sol-gel template method. Rare Metals 29, 501–504 (2010). https://doi.org/10.1007/s12598-010-0156-6
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DOI: https://doi.org/10.1007/s12598-010-0156-6