Structure evolution characterization of Anyang anthracites via H2O2 oxidization and HF acidification

Yude Zhang; Jinlong Tan; Xiaojuan Kang; Haixuan Yu; Ray L Frost

doi:10.1016/j.saa.2014.04.046

Structure evolution characterization of Anyang anthracites via H2O2 oxidization and HF acidification

Spectrochim Acta A Mol Biomol Spectrosc. 2014 Sep 15:130:574-80. doi: 10.1016/j.saa.2014.04.046. Epub 2014 Apr 19.

Authors

Yude Zhang¹, Jinlong Tan², Xiaojuan Kang², Haixuan Yu², Ray L Frost³

Affiliations

¹ 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.
² 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.
³ 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.

PMID: 24813288
DOI: 10.1016/j.saa.2014.04.046

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.

Keywords: Derivative coal; FTIR; Raman; Structural characteristic; XRD.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Carbon / chemistry
China
Coal*
Crystallization
Graphite
Hydrofluoric Acid / chemistry*
Hydrogen Peroxide / chemistry*
Microscopy, Electron, Scanning
Molecular Conformation
Particle Size
Spectroscopy, Fourier Transform Infrared
Spectrum Analysis, Raman
Temperature
X-Ray Diffraction

Substances

Coal
Carbon
Graphite
Hydrogen Peroxide
Hydrofluoric Acid