Microstructure and Magnetic Properties of Highly Ordered SBA-15 Nanocomposites Modified with Fe2O3 and Co3O4 Nanoparticles

被引：19

作者：

Wang, P. F. ^{[1
]}

Jin, H. X. ^{[1
]}

Chen, M. ^{[1
]}

Jin, D. F. ^{[1
]}

Hong, B. ^{[1
]}

Ge, H. L. ^{[1
]}

Gong, J. ^{[1
]}

Peng, X. L. ^{[1
]}

Yang, H. ^{[1
]}

Liu, Z. Y. ^{[1
]}

Wang, X. Q. ^{[1
]}

机构：

[1] China Jiliang Univ, Coll Mat Sci & Engn, Zhejiang Prov Key Lab Magnetism, Hangzhou 310018, Peoples R China

来源：

JOURNAL OF NANOMATERIALS | 2012年 / 2012卷

基金：

中国国家自然科学基金;

关键词：

FISCHER-TROPSCH SYNTHESIS; MESOPOROUS SILICA; MOLECULAR-SIEVES; PORE-SIZE; FABRICATION; CATALYSIS; HYBRID; FE;

D O I：

10.1155/2012/269861

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Owing to the unique order mesopores, mesoporous SBA-15 could be used as the carrier of the magnetic nanoparticles. The magnetic nanoparticles in the frame and the mesopores lead to the exchange-coupling interaction or other interactions, which could improve the magnetic properties of SBA-15 nanocomposites. Mesoporous Fe/SBA-15 had been prepared via in situ anchoring Fe2O3 into the frame and the micropores of SBA-15 using the sol-gel and hydrothermal processes. Co3O4 nanoparticles had been impregnated into the mesopores of Fe/SBA-15 to form mesoporous Fe/SBA-15-Co3O4 nanocomposites. XRD, HRTEM, VSM, and N-2 physisorption isotherms were used to characterize the mesostructure and magnetic properties of the SBA-15 nanocomposites, and all results indicated that the Fe2O3 nanoparticles presented into the frame and micropores, while the Co3O4 nanoparticles existed inside the mesopores of Fe/SBA-15. Furthermore, the magnetic properties of SBA-15 could be conveniently adjusted by the Fe2O3 and Co3O4 magnetic nanoparticles. Fe/SBA-15 exhibited ferromagnetic properties, while the impregnation of Co3O4 nanoparticles greatly improved the coercivity with a value of 1424.6Oe, which was much higher than that of Fe/SBA-15.

引用

页数：7

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