采用氧化石墨和七水合硫酸锌作为初始反应物, 在低温下(80℃)合成了氧化石墨/ZnO, 然后通过低温剥离法制备了高质量石墨烯/ZnO (GNS/ZnO)复合材料. 采用X射线衍射(XRD)、傅里叶变换红外(FTIR)光谱、热重分析仪(TG)、X射线光电子能谱(XPS)、拉曼光谱(RS)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等分析手段对石墨烯/ZnO样品进行了表征. 结果表明: 氧化石墨还原彻底, 纳米ZnO成功地负载到了石墨烯上, 有效地减少了石墨烯片层间的团聚现象. 通过对ZnO和石墨烯/ZnO荧光性能测试, 结果表明: 石墨烯/ZnO发生了荧光淬灭现象, 在光电子领域拥有广阔的应用前景.
Graphite oxide/ZnO was prepared at low temperature (80℃) with graphite oxide (GO) and zinc sulfate heptahydrate (ZnSO4·7H2O) as initial reactants. The graphene/ZnO (GNS/ZnO) was then prepared by a low-temperature chemical exfoliation method. The as-prepared GNS/ZnO was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscope (FT-IR), thermo-gravimetric analysis (TG), X-ray photoelectron spectroscopy (XPS), Raman spectra (RS), scanning electron microscope (SEM) and transmission electron microscope (TEM), respectively. The results indicate that graphite oxide is completely reduced to graphene and the well-dispersed ZnO nanoparticles are successfully deposited on graphene sheets as spacers to keep the neighboring sheets separate. Photoluminescence spectra of ZnO and GNS/ZnO nanocomposites display the ?uorescence quenching property of GNS/ZnO, implying that the GNS/ZnO nanocomposites are expected for practical use in the field of photoelectronics.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | Novoselov K S, Geim A K, Morozov S V, et al. Electric field effect in atomically thin carbon films. Science, 2004, 306(5696): 666-669.[2] Geim A K, Novoselov K S. The rise of graphene. Nat. Mater., 2007, 6(3): 183-191.[3] Geim A K. Graphene: status and prospects. Science, 2009, 324(5934): 1530-1534.[4] Yuan W H, Li B Q, Li L. A green synthetic approach to graphene nanosheets for hydrogen adsorption. Applied Surface Science, 2011, 257(23): 10183-10187.[5] Guo S J, Dong S J, Wang E K. Three-dimensional Pt-on-Pd bimetallic nanodendrites supported on graphene nanosheet: facile synthesis and used as an advanced nanoelectrocatalyst for methanol oxidation. Acs Nano, 2010, 4(1): 547-555.[6] CHEN Cao, ZHAI Wen-Tao, ZHENG Wen-Ge, et al. Preparation and characterization of water-soluble graphene and highly conducting films. Journal of Inorganic Materials, 2011, 26(7): 707-710.[7] Xu C, Wang X, Zhu J W. Graphene-metal particle nanocomposites. J. Phys. Chem. C, 2008, 112(50): 19841-19845.[8] Zhou G M, Wang D W, Li F, et al. Graphene-wrapped Fe3O4 anode material with improved reversible capacity and cyclic stability for lithium ion batteries. Chemistry of Materials, 2010, 22(18): 5306-5313.[9] TAO Li-Hua, CAI Yan, LI Zai-Jun, et al. Electrochemical properties of graphene/CdS quantum dot composites. Journal of Inorganic Materials, 2011, 26(9): 912-916.[10] Liu J C, Liu L, Bai H W, et al. Gram-scale |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%