【摘要】 为进一步增大膨胀石墨的膨胀体积,用二次插入的方法制备了石墨层间化合物。首先用化学氧化法制备了膨胀体积为250mL/g的可膨胀石墨,然后以膨胀体积为250mL/g的可膨胀石墨为原料,用二次插入的方法制备了膨胀体积为380mL/g的膨胀石墨。讨论了各种反应物比率、反应温度和反应时间对膨胀体积的影响。对制得的膨胀石墨进行了各种表征,XRD谱显示产物保持了天然石墨的层状晶体结构,但是产物的石墨层间距离增大。扫描电镜照片显示通过二次插入石墨层间确实被进一步打开。结果显示这种新的制备方法是可行的,它为纳米石墨材料的研究提供了新的思路。更多还原

【Abstract】 Graphite intercalation compounds were prepared by using a double treatment method to increase the expanded volume.The expandable graphite(expanded volume 250mL/g)was prepared by chemical oxidation.Then the expandable graphite was used as the raw material.The expanded graphite,with expanded volume of380mL/g,was prepared by using the reinsertion method.The influences of mixture ratio,reaction temperature and time on the expanded volume were also investigated.X-ray diffraction patterns provided evidence for the intercalation product remained in the crystalline structure of natural graphite,but the graphite layer distance was widened.The SEM images indicate that the graphite layers opened further by the reinsertion.The results showed that the method was potentially feasible and applicable.This new method could potentially provide new insights into graphite-based nano-materials.更多还原