张光宇 王欣 徐芮 刘琳婧 李闯 吕胤霖 陈玉娟 朱大福 杨昕瑞

摘 要：为了获得优异性能的还原氧化石墨烯薄膜电极，以氧化石墨烯分散液为原料、聚乙烯亚胺为粘结剂，采用气液界面自组装法制备了氧化石墨烯薄膜，利用氢碘酸还原得到还原氧化石墨烯薄膜电极。通过扫描电子显微镜、原子力显微镜、X射线衍射仪和X射线光电子能谱仪对薄膜电极进行了表征。结果表明：还原氧化石墨烯薄膜具有良好的表面形貌、均匀的厚度且还原后的碳氧比达到了10.2。当氧化石墨烯分散液浓度为1.5mg/mL时，还原氧化石墨烯薄膜电极的电导率达到495.44S/cm。为石墨烯薄膜在微纳电子器件电极材料的应用方面提供了重要的实验依据。

关键词：气液界面自组装；氧化石墨烯；氢碘酸还原；还原氧化石墨烯薄膜

DOI：10.15938/j.jhust.2018.04.028

中图分类号： O646

文献标志码： A

文章编号： 1007-2683（2018）04-0148-05

Abstract：In order to obtain the reduced graphene oxide film electrodes with superior performance， graphene oxide films were prepared by a method of selfassembled at a liquidair interface with graphene oxide dispersion as raw material， polyethylene imine as binder. The reduced graphene film electrodes were obtained by hydroiodic acid. The film electrodes were characterizated using scanning electron microscopy， atomic force microscopy image， Xray diffraction and Xray photoelectron spectroscopy. The results showed that the reduced graphene films had good surface morphologies， uniform thickness and a carbon to oxygen atomic ratio of the reduced graphene films can achieve 10.2 after HI acid reduction. When the concentration of GO dispersion was 1.5mg/ml， the reduced graphene film electrodes had an electrical conductivity as high as 495.44 Scm-1.This study provides experimental basis for the application of electrode materials in micro/nano electronic devices.

Keywords：selfassembly at a liquidair interface； graphene oxide； hydroiodic acid reduction； reduced graphene oxide films

0 引 言

石墨烯是由碳原子sp2雜化成的只有单原子层厚度的二维晶体，石墨烯独特的二维结构以及优异的机械、电学、热学和光学特性使其正被广泛应用于能量存储、催化和环境等领域[1-4]。石墨烯薄膜作为一种新发展的薄膜电极材料，由于具有高比表面积、电导率，优异的电子迁移率使得在快速发展的微纳电子器件领域潜力巨大。

目前石墨烯薄膜制备主要采用化学气相沉积法（CVD）以及氧化石墨还原法。CVD法虽然可以实现大面积、结晶程度高的石墨烯薄膜的可控制备，却要使用复杂的CVD设备以及转移石墨烯薄膜的额外程序，而且膜的转移过程会显著降低石墨烯薄膜的物理性能[5-6]。……