硫酸溶液中鳞片石墨的阳极氧化

Study on graphite anodization in H2SO4 electrolytes

为了研究用阳极氧化法生产可膨化石墨，文中讨论了用硫酸溶液阳极氧化法制备Ｈ２ＳＯ４石墨层间化合物（ＧＩＣ）时，可能发生的阴、阳极反应以及它们对氧化过程的影响。在不同条件下，测绘出阳极电位与通电量关系曲线，曲线表明随着通电量加大阳极反应类型改变并且阳极电位升高，大电量情况下有氧气析出。用红外光谱分析了氧化产物结构。实验表明该氧化物包含了醚键和羟基等结构单元。氧化物在高温下完全分解。

In order to develope the anodic technique to produce the expansible graphite, possible side reactions and their influence on the anodic oxidation of graphite are discussed and the intentiostatic curves of H2SO4—GIC potential vs. electrical charge in different conditions are recorded during the graphite anodization in H2SO4 electrolytes. It is shown that reaction types change and potential increases with the increase of electrical charge. Oxygen evolution occurs at the condition of large electrical charge. FTIR spectroscopy is used to study the structure of the graphite oxide that would be decomposed in high temperature and contains ether bridges, hydroxyl groups structure units etc.