Angew Chem Int Ed Engl. 2014 Apr 1;53(14):3588-93. doi: 10.1002/anie.201310908.
Graphene oxide (GO) contains several chemical functional groups that are attached to the graphite basal plane and can be manipulated to tailor GO for specific applications. It is now revealed that the reaction of GO with ozone results in a high level of oxidation, which leads to significantly improved ionic (protonic) conductivity of the GO. Freestanding ozonated GO films were synthesized and used as efficient polymer electrolyte fuel cell membranes. The increase in protonic conductivity of the ozonated GO originates from enhanced proton hopping, which is due to the higher content of oxygenated functional groups in the basal planes and edges of ozonated GO as well as the morphology changes in GO that are caused by ozonation. The results of this study demonstrate that the modification of dispersed GO presents a powerful opportunity for optimizing a nanoscale material for proton-exchange membranes.
氧化石墨烯（GO）含有几个化学官能团，这些官能团附着在石墨基面，可以进行处理，以满足特定应用的需求。现在发现，GO 与臭氧的反应导致了高度氧化，从而显著提高了 GO 的离子（质子）电导率。合成了独立的臭氧氧化 GO 薄膜，并将其用作高效聚合物电解质燃料电池膜。臭氧氧化 GO 的质子电导率的增加源于质子跳跃的增强，这是由于臭氧氧化 GO 的基面和边缘的含氧官能团含量增加以及 GO 的形态变化所致。这项研究的结果表明，分散的 GO 的修饰为优化纳米级质子交换膜材料提供了一个有力的机会。
