【摘要】 以FeCl₃·6H₂O为前驱体,聚乙烯基吡咯烷酮（PVP,分子量为8 000）为表面活性剂,先通过水热反应,再经高温煅烧制备具有棒束花状多级结构的α-Fe₂O₃,并用场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）表征样品结构.结果表明:样品结构由棒束以自组装的方式形成,每个棒束由多个单晶纳米棒构成;由该结构制成的传感器件在200℃对丙酮具有良好的选择性及较高的灵敏度.更多还原

【Abstract】 Using FeCl₃·6H₂O as the precursor and poly（vinyl pyrrolidone）（PVP,Mw=8 000）as the surfactant,we synthesized α-Fe₂O₃ with bundle-flower-like hierarchical architectures through a hydrothermal reaction combined with subsequent calcination process.The sample structure was characterized by field emission scanning electron microscopy（FESEM）and transmission electron microscopy（TEM）.The results show that the sample structure is assembled by a rod bundle,each of which consists of a number of single crystal nanorods;the sensor made by this structure has good selectivity and high response to acetone at 200 ℃.更多还原