无机矿化剂辅助水热合成高长径比的α-Fe2O3多孔纳米线 |
Inorganic Mineralizer-Assisted Hydrothermal Synthesis of Porous α-Fe2O3 Nanowires with High Aspect Ratio |
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摘要: 本文以K2SO4为矿化剂,在100 ℃低温水热条件下,制备出大量形貌均一、高分散的直径约40 nm、长度为2~3 μm的α-FeOOH纳米线。该纳米线在300 ℃煅烧2 h后,得到一维形貌保持良好且表面具有多孔结构、长径比可达20的α-Fe2O3纳米线。通过XRD、FTIR、TG-DSC、HRTEM、SAED以及N2物理吸附技术对产物的形貌和结构进行了表征。研究发现,无机盐对一维纳米线形貌的控制至关重要,还详细讨论了K2SO4在α-FeOOH纳米线的成核和生长过程中所起的作用。 |
关键词: 纳米线 氧化铁 水热合成 无机矿化剂 |
基金项目: |
Abstract: In this work, a large amount of uniform and high-dispersed α-FeOOH nanowires with diameters of 40 nm and lengths up to 2~3 μm were synthesized via a low-temperature hydrothermal route using K2SO4 as mineralizer. After sintered at 300 ℃ for 2 h, porous hematite (α-Fe2O3) nanowires with aspect ratios up to about 20 were obtained and the one-dimension morphologies still kept well. The morpjologies and structure of the samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission and high-resolution transmission electron microscopy (TEM & HRTEM), thermogravimetry-differential scanning calorimetry (TG-DSC) and N2 physisorption measurements. The inorganic mineralizer (K2SO4) plays a key role in controlling the nucleation and growth of the nanowires and the function of K2SO4 were also discussed. |
Keywords: nanowire iron oxide hydrothermal synthesis inorganic mineralizer |
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申能美,燕 来,贾小静,杨 勇,李永旺.无机矿化剂辅助水热合成高长径比的α-Fe2O3多孔纳米线[J].无机化学学报,2010,26(5):846-852. |
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