Generation of metal and metal oxide nanoparticles by liquid flame spray process
Generation of metal and metal oxide nanoparticles by liquid flame spray process
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DOI：
10.1023/b:jmsc.0000021454.15740.e6
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发表时间：
2004-04-15
影响因子：
4.5
通讯作者：
Keskinen, J
中科院分区：
文献类型：
--
作者：
Mäkelä, JM;Keskinen, H;Keskinen, J
采用液体火焰喷涂法制备了单组分纳米颗粒。在LFS工艺中，将由溶解在水中的金属硝酸盐组成的溶液喷射到湍流的高温H2-O2-火焰中。最初的喷雾液滴蒸发，随后在火焰中的反应产生金属或金属氧化物蒸气，这些蒸气成核成最终的颗粒形式。在该研究中，检查了从含银、钯和铁的前体生产10 - 60 nm颗粒的工艺特性。使用可变工艺参数的系统研究证明，所产生的纳米颗粒的尺寸仅由金属前体的质量流率设定。观察到粒度分布的几何标准差在1.35 - 1.4的有限范围内变化。通过气溶胶仪器验证了颗粒尺寸，相应地通过X射线衍射（XRD）和透射电子显微镜（TEM）验证了组成和形貌。观察到Ag和Pd颗粒由纯金属组成。对于铁，检测到以下所有三种化合物的存在：Fe、Fe 2 O3和Fe 3 O 4。(C)2004 Kluwer Academic Publishers.
A liquid flame spray (LFS) process has been investigated for the generation of single component nanoparticles. In the LFS process, a solution consisting of metal nitrate dissolved in water is sprayed into a turbulent, high temperature H-2-O-2-flame. The primary spray droplets evaporate and subsequent reactions in the flame produce metal or metal oxide vapours which nucleate to final particulate form. In the study, the process characteristics were examined to produce 10 - 60 nm particles from silver, palladium and iron containing precursors. A systematic study using variable process parameters proved that the size of the generated nanoparticles is set by the mass flow rate of the metal precursor, only. The geometric standard deviation of the size distributions was seen to vary in a limited range of 1.35 - 1.4. The particle size was verified by aerosol instrumentation, the composition and morphology by X-ray diffraction (XRD) and transmission electron microscopy (TEM), correspondingly. The Ag and Pd particles were seen to consist of pure metals. For iron, the presence of all three of the following compounds were detected: Fe, Fe2O3 and Fe3O4. (C) 2004 Kluwer Academic Publishers.