原料粒度及中温反应时间对石墨氧化程度影响规律的研究  

Effects of particle size of graphite and the reaction time under medium-temperature on the oxidation of graphite

作　　者：郭超[1] 吉莉[1] 张东[1] 

机构地区：[1]同济大学材料科学与工程学院,上海201804

出　　处：《材料研究与应用》2012年第3期159-164,共6页Materials Research and Application

基　　金：国家高技术研究发展计划(863计划)课题(2009AA05Z419);国家高技术研究发展计划(863计划)课题(2012AA030303)

摘　　要：采用改进的液相氧化法制备氧化石墨,研究了原料粒度和中温反应时间对所得产物氧化程度的影响,并提出了一种基于X射线衍射和红外光谱分析来定量评价产物氧化程度的方法.实验结果表明:原料粒度和中温反应时间对天然石墨的氧化过程作用明显,原料粒度越小、中温反应时间越长,所得产物的氧化程度越高,但其亦有最优取值,当粒度为141.2μm的石墨经中温氧化3 h后其氧化程度达到最大;主要含氧基团在氧化过程中的形成顺序是羟基、环氧基和羰基.In this paper, the graphite oxides （GOs） were synthesized by the modified Hummers method. The main emphasis was placed on the influences of graphite particle size and the reaction time under medium temperature on the oxidation of graphite ; Besides, a quantitative method based on X-ray diffraction and Fourier Infrared spec- trum analysis was developed to evaluate the oxidation degree of the as-prepared GOs. The results indicated that the above two processing parameters had major influences on the oxidation of graphite, smaller particle size and longer time under medium temperature made it easier for graphite to be oxidized and gave a higher oxidation de- gree of GOs;but the two parameters had their optimal ranges, for instance, graphite powers of 141.2 um obtained best oxidation degree after 3 hours＇ oxidation. Moreover, the the oxidation process was hydroxyl, epoxide and carboxyl. forming order of the oxygen-containing groups in

关 键 词：氧化石墨 氧化程度 XRD 红外光谱 

分 类 号：TQ127.1[化学工程—无机化工]