Raman micro spectroscopy of soot and related carbonaceous materials:: Spectral analysis and structural information
Raman micro spectroscopy of soot and related carbonaceous materials:: Spectral analysis and structural information
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DOI：
10.1016/j.carbon.2005.02.018
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发表时间：
2005-07-01
期刊：
影响因子：
10.9
通讯作者：
Pöschl, U
中科院分区：
文献类型：
--
作者：
Sadezky, A;Muckenhuber, H;Pöschl, U
利用在三种不同激光激发波长（514、633和780纳米）下运行的拉曼显微镜系统，对炭黑及相关含碳材料拉曼光谱的采集和分析的实验条件及数学拟合程序进行了研究和优化。对用于光谱分析的几种谱带组合进行了测试，分别位于约1580、1350、1620和1200 cm⁻¹的四个洛伦兹形谱带（G、D1、D2、D4）以及位于约1500 cm⁻¹的一个高斯形谱带（W）的组合最适合一阶光谱。二阶光谱用位于约2450、2700、2900和3100 cm⁻¹的洛伦兹形谱带拟合效果最佳。报告了几种工业炭黑（德固赛Printex、卡博特Monarch）、柴油炭黑（来自现代重型车辆和乘用车发动机尾气的颗粒物，美国国家标准与技术研究院标准参考物质1650）、火花放电炭黑（帕拉斯GfG100）和石墨的光谱参数（谱带位置、半峰全宽和强度比）。一些参数，特别是位于约1350 cm⁻¹的D1谱带的宽度，提供了结构信息并能够区分样品材料，但不同类型炭黑的表征和区分受到光谱实验重现性以及曲线拟合的统计不确定性的限制。对结果进行了讨论，并与X射线衍射测量以及对类似材料的早期拉曼光谱研究进行了比较，在那些研究中采用了不同的测量和拟合程序。（c）2005爱思唯尔有限公司。保留所有权利。
Experimental conditions and mathematical fitting procedures for the collection and analysis of Raman spectra of soot and related carbonaceous materials have been investigated and optimised with a Raman microscope system operated at three different laser excitation wavelengths (514, 633, and 780 nm). Several band combinations for spectral analysis have been tested, and a combination of four Lorentzian-shaped bands (G, D1, D2, D4) at about 1580, 1350, 1620, and 1200 cm(-1), respectively, with a Gaussian-shaped band (W) at similar to 1500 cm(-1) was best suited for the first-order spectra. The second-order spectra were best fitted with Lorentzian-shaped bands at about 2450, 2700, 2900, and 3100 cm(-1). Spectral parameters (band positions, full widths at half maximum, and intensity ratios) are reported for several types of industrial carbon black (Degussa Printex, Cabot Monarch), diesel soot (particulate matter from modern heavy duty vehicle and passenger car engine exhaust, NIST SRM1650), spark-discharge soot (Palas GfG100), and graphite. Several parameters, in particular the width of the D1 band at similar to 1350 cm(-1), provide structural information and allow to discriminate the sample materials, but the characterisation and distinction of different types of soot is limited by the experimental reproducibility of the spectra and the statistical uncertainties of curve fitting. The results are discussed and compared with X-ray diffraction measurements and earlier Raman spectroscopic studies of comparable materials, where different measurement and fitting procedures had been applied. (c) 2005 Elsevier Ltd. All rights reserved.