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以铁单质和草酸溶液为原料,将0.75mol/L的草酸溶液滴在铁片上,于空气中200~600℃范围内加热1h,制备了Fe3O4纳米棒和Fe2O3纳米线,用扫描电镜(SEM)、X射线衍射仪(XRD)和透射电子显微镜(TEM)对产物进行表征,并研究了反应温度对产物形貌的影响.结果表明,在200~500℃下空气中反应1h在铁片上直接生长出矩形截面的多晶的立方相Fe3O4纳米棒,其直径范围约为0.5~0.8μm.当反应温度为600℃,得到的产物为六方相的Fe2O3纳米线.研究表明,C2H2O4对纳米棒的形成起关键作用,并提出了可能生长机理.
Fe3O4 nanorods and Fe2O3 nanowires were prepared by using iron and oxalic acid as raw materials, dropping 0.75 mol / L oxalic acid solution on the iron sheet and heating in the air at 200-600 ℃ for 1 h. Scanning electron microscopy (SEM) , X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to characterize the product and the effect of reaction temperature on the morphology of the product was studied. The results showed that the reaction was directly carried out on the iron sheet at 200 ~ 500 ℃ for 1 h in air The polycrystalline cubic Fe3O4 nanorods with rectangular cross section have a diameter of about 0.5 ~ 0.8μm .When the reaction temperature is 600 ℃, the obtained product is hexagonal Fe2O3 nanowires.The results show that the formation of nanorods Played a key role and proposed a possible growth mechanism.