Studies on Nano-Diamond Prepared by Explosive Detonation by Raman and Infrared Spectroscopy
WEN Chao1，2, JIN Zhi-hao1, LIU Xiao-xin2,LI Xun2, GUAN Jin-qing2, SUN De-yu2, LIN Ying-rui2, TANG Shi-ying2, ZHOU Gang2, LIN Jun-de2
1. State Key Laboratory of Mechanical Behavior of Materials，Xi'an Jiaotong University, Xi'an 710049, China 2. Northwest Institute of Nuclear Technology，Xi'an 710024, China
Abstract：Nano-diamond was synthesized by TNT/RDX explosives detonation in a steel chamber and characterized by X-ray diffraction(XRD), laser Raman spectroscopy, and infrared spectroscopy. XRD results indicate that nano-diamond has cubic diamond structure. The parameter of unit cell of nano-diamond is 0.359 23 nm and is 0.72% larger than that of the bulk diamond. The high-density defects and other impurity atoms in the nano-diamond structure may lead to the large lattice constant. The examination results of Raman spectra show that the Raman band is broader and shifts to low frequency by 3 cm-1, because the size of nano-diamond reaches nanometer order. There is little graphite in the nano-diamond. There are two peaks in FTIR of the nano-diamond, which are characteristic peaks of diamond at 1 262 and 1 134 cm-1. Besides these two peaks, there are six peaks at 3 422, 1 643, 2 971, 2 930, 2 857 and 1 788 cm-1 respectively. The FTIR bands at 2 930 and 2 857 cm-1 are the antisymmetrical and symmetrical stretch vibration absorption spectra of CH2 respectively. The 3 422 cm-1 is the stretch vibration absorption peak of O—H. The 1 634 cm-1 confirms that there are H2O in the nano-diamond. The 2 971 cm-1 is the antisymmetrical stretch vibration absorption peak of CH3. The 1 788 cm-1 is the stretch vibration absorption peak of CO. These indicate that there are H and O elements in the nano-diamond. From the mechanism of the nano-diamond, the authors discuss the reason for the vibration absorption peaks of O—H, CH2, CH3, and CO, existing in the FTIR of the nano-diamond.
文 潮1,2，金志浩1，刘晓新2，李 迅2，关锦清2， 孙德玉2，林英睿2，唐仕英2，周 刚2，林俊德2 . 炸药爆轰合成纳米金刚石的拉曼光谱和红外光谱研究[J]. 光谱学与光谱分析, 2005, 25(05): 681-684.
WEN Chao1，2, JIN Zhi-hao1, LIU Xiao-xin2,LI Xun2, GUAN Jin-qing2, SUN De-yu2, LIN Ying-rui2, TANG Shi-ying2, ZHOU Gang2, LIN Jun-de2. Studies on Nano-Diamond Prepared by Explosive Detonation by Raman and Infrared Spectroscopy . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(05): 681-684.
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