title: Structure evolution characterization of Anyang anthracites via H2O2 oxidization and HF acidification.
abstract: 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.
authors.affiliation: 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. Electronic address: zhangyudehn@hotmail.com.
authors.forename: Yude
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: 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.
authors.forename: Jinlong
authors.initials: J
authors.lastname: Tan
authors.affiliation: 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.
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Kang
authors.affiliation: 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.
authors.forename: Haixuan
authors.initials: H
authors.lastname: Yu
authors.affiliation: School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia. Electronic address: r.frost@qut.edu.au.
authors.forename: Ray L
authors.initials: RL
authors.lastname: Frost
mesh_terms: D002244:Carbon / Q000737:chemistry; D002681:China; D003031:Coal; D003460:Crystallization; D006108:Graphite; D006858:Hydrofluoric Acid / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008968:Molecular Conformation; D010316:Particle Size; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D003031:Coal; D002244:Carbon; D006108:Graphite; D006861:Hydrogen Peroxide; D006858:Hydrofluoric Acid
keywords: Derivative coal; FTIR; Raman; Structural characteristic; XRD