摘要
采用液相氧化法制备氧化石墨,考察了石墨用量、低温反应时间、高锰酸钾用量、硝酸钠用量以及高温 反应阶段的加水方式等工艺因素对产物结构和电阻率的影响,初步探讨了石墨的液相氧化过程。研究结果袁 明:XRD和电阻率可表征产物的氧化程度,氧化程度足够高的产物其XRD谱中出现尖锐的氧化石墨(001) 面的特征衍射峰,电阻率达102Ω·m的数量级。制备较高氧化程度的氧化石墨的原料配比及工艺条件为:天 然鳞片石墨10g,浓硫酸230ml,高锰酸钾30g,低温反应时间2h,高温反应过程中采取连续加水的方式将反 应液的温度控制在100℃以内。
Graphite Oxide （GO） was prepared from flake graphite through liquid oxidation based on Hummers method. The influences of the content of graphite ,the time under low reaction temperature ,the content of sodium nitrate ,the content of potassium permanganate and the way of adding water under high reaction temperature on the structure and resistivity of GO were investigated systematically. The formation course of GO through liquid oxidation was explored. The results show that the oxidation degree of the product can be determined, by XRD analysis and the determination of resistivitity. For the product of high oxidation degree,a sharp characteristic reflection peak of （001） of GO appears in XRD analysis,and the resistivity reaches to 10^2 Ω·m. The raw material ratio and technological conditions for preparing GO with higher oxidation degree are：10g of natural graphite flakes,30g of potassium permanganate, 230ml concentrated sulfuric acid, 2hr of low temperature reaction time and controlling the reaction temperature within 100℃ by adding water continuously at high temperature reaction.
出处
《炭素》
2005年第4期10-14,共5页
Carbon
基金
国家自然科学基金(50372019)
关键词
氧化石墨
制备
氧化程度
XRD
电阻率
graphite oxide
preparation
oxidative degree
XRD
resistivity
作者简介
傅玲（1980-），女，浙江金华人，硕士生，主要从事新型炭材料的研究与开发。
通讯作者：刘洪波，教授，博士生指导教师，E—mail：hndxliuhongbo@yahoo．com．cn
