In this work, the mechanism of the NO₂ reaction with PEDOT-RGO composite film has been investigated via in situ Raman spectroscopy. Reduced graphene oxide (RGO), poly(3,4-ethylenedioxytiophene)-reduced graphene oxide (PEDOT-RGO) and poly(3,4-ethylenedioxytiophene)/ClO₄⁻ (PEDOT/ClO₄⁻) films were fabricated using an electrodeposition method and used as resistance sensors of gaseous nitrogen dioxide. The experimental results indicate that NO₂ causes overoxidation of the PEDOT polymer (PEDOT/ClO₄⁻ film) which leads to resistance increase and irreversible response. In contrast, the PEDOT-RGO response in the presence of NO₂ is reversible. During short NO₂ exposure, PEDOT from the PEDOT-RGO composite does not react to the gas but the presence of RGO in the PEDOT-RGO composite does not affect the overoxidation potential. It was found that the nitrogen dioxide reacts more readily to reduced graphene oxide, thus RGO “protects” the polymer against the adverse overoxidation process.

在这项工作中，已经通过原位拉曼光谱研究了NO ₂与PEDOT-RGO复合膜的反应机理。还原的石墨烯氧化物（RGO），聚（3,4- ethylenedioxytiophene） -减少氧化石墨烯（PEDOT-RGO）和聚（3,4- ethylenedioxytiophene）/ CLO ₄ ^-（PEDOT / CLO ₄ ^{- ）}膜使用电沉积制造的用作气态二氧化氮的电阻传感器。实验结果表明，NO ₂原因过氧化的PEDOT聚合物（PEDOT / CLO ₄ ^-膜），这导致电阻增加和不可逆的反应。相反，在NO ₂存在下的PEDOT-RGO反应是可逆的。在短暂的NO ₂暴露期间，来自PEDOT-RGO复合材料的PEDOT不会与气体发生反应，但是PEDOT-RGO复合材料中RGO的存在不会影响过氧化电位。发现二氧化氮更容易与还原的氧化石墨烯反应，因此RGO“保护”聚合物免受不利的过氧化过程的影响。