Formation and characteristics of Fe2O3 nano-particles in doped low pressure H2/O2/Ar flames

被引：66

作者：

Janzen, C ^{[1
]}

Roth, P ^{[1
]}

机构：

[1] Univ Duisburg, Inst Verbrennung & Gasdynam, D-47048 Duisburg, Germany

来源：

COMBUSTION AND FLAME | 2001年 / 125卷 / 03期

关键词：

D O I：

10.1016/S0010-2180(01)00235-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Iron-oxide (Fe2O3) nano-particles in the size range 4 to 20 nm have been synthesized via a gas-phase route utilizing a H-2/O-2/Ar low-pressure flame. The burner stabilized flame was doped with different amounts of iron-pentacarbonyl (Fe(CO)(5)) with concentrations in the range 262 to 2096 ppm. The particles were analyzed in situ according to their mass and charge by means of a particle mass spectrometer (PMS). The specific surface area, size. and structure of collected particles were determined ex situ by BET-adsorption and transmission electron microscopy (TEM). The particles are single crystals of gamma -Fe2O3 as identified by X-ray powder diffraction and Mossbauer spectroscopy. The experimental results were verified by a theoretical model including the homogeneous gas-phase reactions of H-2/O-2/Ar as well as transport properties of the burner stabilized flame and the particle dynamics. Good agreement of measured and calculated particle sizes was obtained. (C) 2001 by The Combustion Institute.

引用

页码：1150 / 1161

页数：12

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