CAJ | 학술논문

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2～3μm的αFeOOH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.
본문이K2SO4위광화제,재100℃저온수열조건하.제비출대량형모균일、고분산적직경약40 nm、장도위2～3μm적αFeOOH납미선.해납미선재300℃단소2 h후,득도일유형모보지량호차표면구유다공결구、장경비가체20적α-Fe2O3납미선.통과XRD、FTIR、TG-DSC、HRTEM、SAED이급N2물리흡부기술대산물적형모화결구진행료표정.연구발현.무궤염대일유납미선형모적공제지관중요,환상세토론료K2SO4재α-FeOOH납미선적성핵화생장과정중소기적작용.
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 hydmthermal 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.