紫外还原法制备石墨烯

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李帅，藺玉胜，魏燕彦，胡海青*

（青岛科技大学 橡塑材料与工程教育部重点实验室，山东 青岛266042）

摘要： 采用简单环保的紫外光照射法还原氧化石墨烯（GO）来制备分散性良好的石墨烯（RGO）水分散液。研究了3种不同还原剂（葡萄糖、硼氢化钠、羧甲基纤维素）的还原效果，验证了紫外光照射还原GO的反应机理。对反应产物用紫外-可见吸收光谱（UV-vis）、拉曼散射光谱（Raman）、X-射线衍射(XRD)等测试手段进行了表征。结果表明：紫外光照射可以有效地将GO表面的含氧基团还原，制备出的石墨烯分散性良好，可均匀分散在水溶液中并可以保持稳定状态达3周以上，有效地解决了石墨烯不易分散在溶剂中的缺点。

关键词： 石墨烯；葡萄糖；硼氢化钠；羧甲基纤维素；紫外还原

中图分类号：TB 321文献标志码：A

Preparation of Graphene by UV Light Irradiation

LI Shuai, LIN Yusheng, WEI Yanyan, HU Haiqing

（Key Laboratory of Rubber-Plastics, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）

Abstract: In this regard, graphite oxide (GO) with various oxygen containing functional groups shows good compatibility with water. At the same time, the oxygen containing functional groups also provide the graphene oxide some new features, such as excellent dispersion and compatibility with polymer having polar groups, etc. In this paper, the graphene with well dispersibility in water was prepared from graphene oxide (GO) by using a facile and environmentally benign method—UV radiation reduction. The reduction effects of three different reductants (glucose, sodium borohydride and carboxymethyl cellulose) were investigated and the reduction mechanism was proved in the paper. The graphene obtained are characterized by UV-visible absorption spectrum (UV-vis), Raman spectroscopy (Raman) and X-ray diffraction (XRD), etc. The result shows that: the oxygen-containing groups of GO can be restored effectively by UV-vis light and the prepared graphene with well dispersibility can be uniformly dispersed in the aqueous solution and keep stable for more than 3 weeks and the problem of poor compatibility of graphene is effectively solved by UV radiation reduction with suitable reductants. The reduction effect of the graphene oxide (GO) aqueous solution without reducing agents is the worst. Sodium borohydride reducing agent is the best reductant among the three reducing agents. Some CMC (glue system) in the system is an effective way to maintain the longterm stability of the graphene in water.

Key words: graphene; glucose; sodium borohydride; carboxymethyl cellulose; UV radiation reduction

 收稿日期：2015-08-19

基金项目：国家自然科学基金项目（51373084）；青岛市建设事业科技发展专项项目（JK2014-4).

作者简介：李帅（1989—），男，硕士研究生.*通信联系人.

文章编号：16726987（2016）06063106；DOI：10.16351/j.16726987.2016.06.008