Production of nanostructured graphite by grinding in controlled atmosphere and intercalation reaction

高结晶性天然石墨具有多种功能特性，包括客体分子的存储能力和高导电性。细石墨颗粒具有高结晶度和高度发达的纳米结构，有望具有高功能性能，如储气性能和导电性。用行星球磨机和振动球磨机在控制良好的干燥气氛（如氮气气氛）和真空气氛下的各种工况下进行了试验。实验测定了用该方法研磨的产物的尺寸、比表面积和晶体结构。虽然传统的磨削方法往往会导致石墨失去其结晶度，随着比表面积的增加，我们发现，提出的磨削条件产生高结晶度和高度发达的纳米结构。本文所提出的方法成功地从具有高比表面积的产物中合成了PtCl_4石墨插层化合物（GIC）。实验发现，由高结晶度和高比表面积的石墨颗粒制备的GICs比由单一性质的高结晶度或高比表面积的石墨颗粒制备的GICs具有更高的反应活性。高结晶度和高比表面积的磨粒石墨作为催化剂载体也具有较高的性能。

Highly crystalline natural graphite has various functional properties, including storage capacity of guest molecules and a high electrical conductivity. Fine graphite particles, which have high crystallinities and highly developed nanostructures, are expected to have highly functional properties such as gas storage performance and electrical conductivity.A planetary ball mill and a vibration ball mill were used under various operating conditions in well-controlled dry atmospheres such as N_2 or a vacuum atmosphere. The size, specific surface area, and crystal structure of the products ground by the method proposed in this study were experimentally determined. Although conventional grinding methods tend to cause graphite to lose its crystallinity as the specific surface area increases, we found that the proposed grinding conditions yield both a high crystallinity and a highly developed nanostructure. PtCl_4 graphite intercalation compounds (GIC) were successfully synthesized from products with a high specific surface area ground by the method proposed in this study. It is experimentally found that the GICs prepared from the graphite particles with high crystallinity and high specific surface area have higher reactivity than that of the GICs prepared from the graphite particles with single property of high crystallinity or high specific surface area. The ground graphite particles with high crystallinity and high specific surface area are also found to have the high performance as the catalyst carrier.