| 形貌可控的氧化铁中空柱的制备 |
| Preparation of Iron Oxide Hollow Column with Manipulative Shape |
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| 摘要: 以FeCl3·6H2O，NaH2PO4和Na2SO4为原料，利用水热法合成了氧化铁中空柱。采用X射线衍射仪、透射电子显微镜和扫描电子显微镜对所得样品进行表征，样品为α-Fe2O3，呈现中空柱状结构，外径为200~240 nm，内径为90~120 nm，高度为120~150 nm。实验表明改变反应时间可得不同形貌的氧化铁；反应温度和pH值能影响中空柱的内径；改变磷酸根和硫酸根浓度可得不同纵横比的中空柱。为评估其作为点火药的性能，对氧化铁与铝粉的混合物进行热分析，结果表明，77 μm球状氧化铁、30 nm球状氧化铁和内径90 nm的中空柱状氧化铁的分解温度分别为620 ℃、561 ℃、570 ℃，放热量分别为517 J·g-1、1 090 J·g-1、1 448 J·g-1。 |
| 关键词: 水热法 中空结构 氧化铁 可控 |
| 基金项目: |
| Abstract: Iron oxide hollow columns were prepared by hydrothermal method. FeCl3·6H2O, NaH2PO4 and Na2SO4 were used as materials. X-ray diffraction indicated that all of the samples were α-Fe2O3. The samples were characterized by hollow column morphology with outer diameters of 200~240 nm, inner diameters of 90~120 nm and heights of 120~150 nm using SEM and TEM observation. The hollow column formation mechanism was investigated, which showed that the morphology was determined by the reaction time, the the shape and size of the column by the reaction temperature and pH, length and the width of the column by the concentrations and ratio of phosphate and sulfate ions. To evaluate its performance as an igniting powder, the mixture of iron oxide and aluminum was tested by thermal analysis. It turned out that the decomposition temperature of 77 μm sphere iron oxide, 30 nm sphere iron oxide and 50 nm hollow column iron oxide was 620 ℃, 561 ℃, 570 ℃ respectively, and heat release was 517 J·g-1, 1090 J·g-1, 1 448 J·g-1. |
| Keywords: hydrothermal method hollow column iron oxide manipulation |
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| 王晓倩,张 琳,朱顺官,赵 佳.形貌可控的氧化铁中空柱的制备[J].无机化学学报,2012,28(11):2313-2320. |
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