石墨烯表面不含含氧基团,这导致石墨烯在水中很难分散.制备具有水溶性的石墨烯是一个研究焦点.本研究采用氧化石墨低温真空膨胀的方法,通过调控氧化石墨烯的含氧基团数目,制备具有水溶解性的石墨烯材料.AFM测试表明所制备的水溶性石墨烯的最小片层厚度约为1.7 nm,尺寸为1.0 μm.分散实验结果表明;所制备的石墨烯在不添加任何表面活性剂的中性水溶液情况下可以稳定分散,其浓度为0.07 mg/mL;此外,电性能测试表明:石墨烯薄膜材料的导电率可高达1000 S/m,比通过非共价键石墨烯制备的薄膜导电率要高.
参考文献
| [1] | Geim A K,Novoselov K S.The rise of graphene.Nature Materials,2007,6(8):183-191. |
| [2] | 黄毅,陈永胜.石墨烯的功能化及其相关应用,中国科学B辑:化学,2009,39(9):887-896. |
| [3] | Xu Y X,Bai H,Lu G W,et al.Flexible graphene films via the fil-tration of water-soluble noncovalent functionalized gaphene sheets.Journal of the American Chemical Society,2008,130(18):5856-5857 |
| [4] | Li D,Muller M B,Gilje S,et al.Processable aqueous dispersions of gaphene nanosheets.Nature Materials,2008,3(2):101-105. |
| [5] | Stankovic S,Piner R D,Chen X Q,et al.Stable aqueous disper-sions of gaphitic nanoplatelets via the reduction of exfoliated graphite oxide in the presence of poly(sodium 4-styrenesulfonate).Journal of Materials Chemistry,2006,16(2):155-158. |
| [6] | Lv W,Tang D M,He Y B,et al.Low-temperature exfoliated gra-phenes:vacuum-promoted exfoliation and electrochemical energy storage.ACS Nano,2009,3(11):3730-3736. |
| [7] | Zhang H B,Zheng W G,Yan Q,et al.Electrically conductive polyethylene terephthalate/graphene nanocomposites prepared by melt compounding.Polymer,2010,51(5):1191-1196 |
| [8] | Shin H J,Kim K K,Benayad A,et al.Efficient reduction of graphite oxide by sodium borohydride and its effect on electrical conductance.Advanced Functional Materials,2009,19(12):1987-1992. |
| [9] | Gao J,Liu F,Liu Y L,et al.Environment-friendly method to pro-duce gaphene that employs vitamin C and amino acid.Chemistry of Materials,2010,22(7):2213-2218. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%