| 多孔氧化铁纳米盘的制备与表征 |
| Preparation and Characterization of Porous α-Fe2O3 Nanodisks |
|
| 摘要: 通过水热-高温处理两步法，合成了直径150～200 nm厚度40～80 nm的多孔α-Fe2O3纳米盘颗粒。并用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、氮气吸附-脱附仪和震动样品磁强计(VSM)对样品进行了表征。对颗粒生长的机理进行了初步研究，结果表明磷酸根离子对α-Fe2O3纳米颗粒(001)面的选择性吸附在盘状颗粒的生长过程中起着重要作用。合成的多孔纳米盘颗粒BET比表面积为27 m2·g-1，孔径在2～100 nm的范围内分布，样品还具有明显的铁磁性，较其他结构的α-Fe2O3纳米颗粒具有较高的矫顽力。 |
| 关键词: 氧化铁 纳米盘 多孔材料 磁性 |
| 基金项目: |
| Abstract: Porous α-Fe2O3 nanodisks with diameter of 150～200 nm and thickness of 40～80 nm were synthesized via a hydrothermal and subsequent high temperature treatment route. The synthesized porous nanodisks were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray photoelectron spectroscopy(XPS), nitrogen adsorption/desorption isotherms and vibrating sample magnetometry(VSM). The synthesis mechanism was suggested by the special adsorption of phosphate on the(001) plane of α-Fe2O3 nanoparticles. The synthesized porous nanodisks showed a BET surface area of 27 m2·g-1 and a pore distribution from 2 nm to 100 nm. The magnetic hysteresis loop showed a higher coercivity than many reported α-Fe2O3 nanostructure materials. |
| Keywords: iron oxide nanodisks porous materials magnetic |
| |
| 摘要点击次数: 2221 |
| 全文下载次数: 2542 |
| 吕宝亮,徐 耀,吴 东,孙予罕.多孔氧化铁纳米盘的制备与表征[J].无机化学学报,2008,24(10):1690-1694. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
