Title

Hydrothermal synthesis of cubic α-Fe2O3 microparticles using glycine: Surface characterization, reaction mechanism and electrochemical activity

Document Type

Journal Article

Publisher

Elsievier

Faculty

Faculty of Computing, Health and Science

School

School of Engineering (SOE)

RAS ID

12605

Comments

This article was originally published as: Yin, C., Minakshi, M., Ralph, D., Jiang, Z., Xie, Z. , & Guo, H. (2011). Hydrothermal synthesis of cubic α-Fe2O3 microparticles using glycine: Surface characterization, reaction mechanism and electrochemical activity. Journal of Alloys and Compounds, 509(41), 9821-9825. Original article available here

Abstract

Cubic α-Fe2O3 (hematite) microparticles (side lengths = 0.3–1.3 μm) have been synthesized using glycine and ferric chloride via a simple one-step hydrothermal reaction. Their morphological, mineralogical and surface properties have been determined using scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS). XRD analysis indicated that the synthesized α-Fe2O3 microparticles were minerallogically pure. An increase in hydrothermal reaction duration from 10 to 24 h increased the atomic percentages of α-Fe2O3 on the surface of the microparticles by almost 8%. The mechanism concerning reactions of species to produce this microparticles precipitate was elucidated based on thermodynamics and ionic equilibrium aspects. In the electrochemical analysis, the synthesized α-Fe2O3 microparticles (as cathode material) exhibit an approximate charge capacity of 160 mAh/g and excellent coulombic efficiency of 94%.

DOI

10.1016/j.jallcom.2011.08.048

 

Link to publisher version (DOI)

10.1016/j.jallcom.2011.08.048