Structure Characterization of CuCl2-FeCl3-H2SO4 graphite intercalation compounds

摘要

Graphite intercalation compounds (GIC) is important in both scientific research and technological application. GIC can be used as the precursors to fabricate new materials in correlation with carbon nanotubes (CNTs) or other CNTs associated nano-materials. In present work, graphite intercalation compounds with CuCl2-FeCl3-H2SO4 (GICs) have been synthesized via a hydrothermal treatment at 150 ℃ and exfoliation method. The structure and composition of these graphite intercalation compounds are analyzed by means of x-ray diffraction, energy dispersive x-ray (EDX microanalysis) and high-resolution transmission electron microscopy (HRTEM). The results demonstrate that the CuCl2-FeCl3-H2SO4 molecules have been successfully intercalated into the interlayer of graphite sheets. Temperature dependence of magnetization is measured from 5 K to 300 K. Two antiferromagnetic transitions of the graphite intercalation compounds are observed at low temperatures. The critical transition temperatures are estimated to be about 50 K and 102 K, respectively. The related magnetic properties are discussed briefly.