光谱学与光谱分析 |
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Measurement and Analysis of Nanometer Particles of Silica and Carbon Black by Diffuse Reflection FTIR Spectra |
YANG Xiao-zhan1,TANG Chong-min1,LIU Zi-li2,YAO Yong-yi1,LI Rui-xia1,WU Da-cheng1* |
1. Textile Research Institute, Sichuan University, Chengdu 610065, China 2. Chengdu Donglanxing Sci-Tech Company, Chengdu 610051, China |
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Abstract By using FTIR-FTS3000 spectrometer and infrared diffuse reflection accessory, the spectra of the nanometer particles of silica, carbon black and their blends with different weight ratio were collected and characterized. It was found from the measured results that blue-shift and broadening phenomenon occurred in the nanometer particle materials in comparison with the mass ones. These phenomena could be explained by the little size effect and quantum size effect. No perfect spectrum could be collected because of the strong absorbance of the nanometer particle materials. For the blends of silica and carbon black there was a maximum absorption corresponding to the critical concentration, where the weight ratio of silica to carbon black was 100∶20, and below this ratio the relationship between the function F(R) and the concentration obeyed Lambert-Beer’s law. Above this ratio, the absorbance will not increase with increasing the proportion of the carbon black in the system.
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Received: 2006-10-08
Accepted: 2007-02-06
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Corresponding Authors:
WU Da-cheng
E-mail: wdc@email.scu.edu.cn
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