基于H2O2氧化和HF酸化的安阳无烟煤结构演化特征
Structure evolution characterization of Anyang anthracites via H2O2 oxidization and HF acidification.
作者信息
Zhang Yude, Tan Jinlong, Kang Xiaojuan, Yu Haixuan, Frost Ray L
机构信息
Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, PR China; School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.
Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, PR China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Sep 15;130:574-80. doi: 10.1016/j.saa.2014.04.046. Epub 2014 Apr 19.
The structural characteristics of the raw coal (AY), the H2O2 oxidized coals (AY-H2O2) and the HF acidized AY-H2O2 (AY-H2O2-HF) were investigated by SEM, X-ray diffraction, Raman and FTIR spectroscopy. The results indicate that the derivative coals show an obvious increase in the aromaticity, crystalline carbon content and hydroxyl content, especially the AY-H2O2-HF. The stacking layer number of crystalline carbon decreases and the aspect ratio (La/Lc) remarkably increases for AY-H2O2 and AY-H2O2-HF. The crystalline layers become much thinner. The particle size of AY-H2O2-HF in width significantly decreases from 1 μm to less than 100 nm. The combination of H2O2 oxidization and HF acidification is effective to reduce the size of the aromatic layers and to increase the reactivity of derivative coals. The process can help us obtain the superfine crystalline carbon materials like graphite structure.
通过扫描电子显微镜（SEM）、X射线衍射、拉曼光谱和傅里叶变换红外光谱（FTIR）对原煤（AY）、过氧化氢氧化煤（AY-H2O2）和氢氟酸酸化的AY-H2O2（AY-H2O2-HF）的结构特征进行了研究。结果表明，衍生煤的芳香性、结晶碳含量和羟基含量明显增加，尤其是AY-H2O2-HF。对于AY-H2O2和AY-H2O2-HF，结晶碳的堆叠层数减少，长宽比（La/Lc）显著增加。结晶层变得更薄。AY-H2O2-HF的宽度粒径从1μm显著减小到小于100nm。过氧化氢氧化和氢氟酸酸化相结合有效地减小了芳香层的尺寸并提高了衍生煤的反应活性。该过程有助于我们获得类似石墨结构的超细结晶碳材料。
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