Large-scale synthesis of high-content Fe nanotubes/nanorings with high magnetization by H2 reduction process
Large-scale synthesis of high-content Fe nanotubes/nanorings with high magnetization by H2 reduction process
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DOI：
10.1016/j.materresbull.2013.05.077
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发表时间：
2013-12
影响因子：
5.4
通讯作者：
Xiaoli Liu;Minrui Zheng;Y. Lv;Jie Fang;C. Sow;Haiming Fan;J. Ding
中科院分区：
文献类型：
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作者：
Xiaoli Liu;Minrui Zheng;Y. Lv;Jie Fang;C. Sow;Haiming Fan;J. Ding
通过在指定温度下还原α- fe2o3空心纳米结构，成功制备了从纳米管（nt）到纳米片（nr）的高含量铁空心纳米结构。考察了还原条件对产物结构和性能的影响。随着还原温度的升高，具有菱形相的α- fe2o3可以转变为立方反尖晶石相Fe3O4。此后，相转变为优势的立方铁，保持相同的形貌。在450°C时，70 nm NRs和NTs的最高ms分别为126 emu/g和123 emu/g。我们的研究结果提供了一种减少单晶α- fe2o3空心纳米结构以获得高磁化强度的通用策略，这是许多应用所需要的。
High-content Fe hollow nanostructures from nanotubes (NTs) to nanorings (NRs) have been successfully fabricated by reduction of α-Fe2O3hollow nanostructures at designated temperature. We investigated the influence of reduction condition on the structure and property of the products. With increasing reduction temperature, α-Fe2O3with rhombohedral phase could be converted to cubic inverse spinel phase Fe3O4. Thereafter the phase was converted to the dominant cubic Fe preserving the same morphology. The highestMsis 126 emu/g and 123 emu/g for 70 nm NRs and NTs reduced at 450 °C, respectively. Our results provide a general strategy of reducing single-crystalline α-Fe2O3hollow nanostructures to get high magnetization which is required for many applications.