中文摘要：

以氯化铁为铁源,添加适量二甲胺硼烷（DMAB）作为表面活性剂。用简单的液相方法在低温下制备出大量片花状α-Fe2O3纳米结构。讨论了反应时间和DMAB与FeCl3摩尔比对产物形貌的影响。在温度为80℃,摩尔比为1∶1时制备出的片状α-Fe2O3形貌完整性较好。用扫描电子显微镜、X射线衍射、透射电镜分别表征了α-Fe2O3的微观形貌、成分与结构。初步探讨了片状形成的机理。

英文摘要：

Using FeCl3 as iron source,dimethylamine borane（DMAB） as surfactant,α-Fe2O3 flower-like nanosheets were synthesized via a solution-phase method at a low temperature.The effects of reaction time and molar ratio of DMAB to FeCl3 on the morphology of product were studied.At 80℃,molar ratio of 1∶1,uniform α-Fe2O3 nanosheets could be synthesized.The morphology,composition and crystal structure of the nanosheets were characterized using scanning electron microscopy（SEM）,X-ray diffraction（XRD）,transmission electron microscopy（TEM）.The growth mechanism of nanosheets was also discussed.