| 光谱学与光谱分析 |
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| Raman Spectrum of Nano-Graphite Synthesized by Explosive Detonation |
| WEN Chao1，2, LI Xun2, SUN De-yu2, GUAN Jin-qing2, LIU Xiao-xin2, LIN Ying-rui2 , TANG Shi-ying2, ZHOU Gang2, LIN Jun-de2, JIN Zhi-hao1 |
1. State Key Laboratory Mechanical Behavior for Materials，Xi’an Jiaotong University, Xi’an 710049, China
2. Northwest Institute of Nuclear Technology，Xi'an 710024, China |
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Abstract The nano-graphite powder synthesized by the detonation of explosives with negative oxygen balance is a new powder material with potential ａｐｐｌｉｃａｔｉｏｎｓ. In this work, ｔｈｅ preparation of nano-graphite powder in steel chamber by pure TNT (trinitrotoluene) explosives has been introduced. In the synthesiｓ process, ｔｈｅ protective gasｅｓ in the steel chamber are N2, CO2 ａｎｄ Ar, and the pressure is 0.25-2 atm. Raman spectrum of ｔｈｅ nano-graphite was measured. The characteristic Raman band assigned to sp2 ｏｆ graphite has been observed at about 1 585 cm-1 with half-peak width of 22 cm-1. The peak shifted to ａ higher frequency by 5 cm-1 compared with that of bulk graphite. The authors explain this blue shift phenomenon by size effect. The average size of nano-graphite from Raman measurement is 2.97-3.97 nm. X-ray diffraction (XRD) and ｔransmission electron microscopy (TEM) were used to measure the structure and particle size of ｔｈｅ nano-graphite. The crystallite size of nano-graphite estimated from XRD and TEM are 2.58 nm(acid untreated) and 1.86 nm(acid treated) respectively, which is in accord with the results of ｔｈｅ measurement approximately.
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Received: 2003-05-16
Accepted: 2003-10-26
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Corresponding Authors:
WEN Chao
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| Cite this article: |
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WEN Chao,LI Xun,SUN De-yu, et al. Raman Spectrum of Nano-Graphite Synthesized by Explosive Detonation [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(01): 54-57.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2005/V25/I01/54 |
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