采用水热法一步合成了含氮石墨烯量子点(NGQDs),通过原子力显微镜(AFM)、透射电镜(TEM)、X射线光电子能谱(xPS)等对NGQDs的形貌和组成进行表征,并进一步通过紫外-可见光谱(UV-Vis)、荧光光谱(PL)等手段研究了NGQDs的光学性质.AFM和TEM分析结果表明,NGQDs尺寸约为8.9 nm、厚度为0.6～2.0 nm(即1～3个碳原子层).XPS分析结果表明NGQDs中氮含量约为17％,且氮元素主要以“吡咯N”形式存在.光谱学实验表明,NGQDs的激发光谱与吸收光谱基本一致,且其发射光谱与激发波长之间不存在依赖关系.此外,NGQDs的量子产率为～l8％,并随着含氮量的增加而增加,且其荧光寿命衰变曲线可以被拟合成很好的双指数衰变曲线(τ1=2.93 ns,τ2=9.00 ns),表明NGQDs有两种发色源,即边缘富有含氧官能团的sp2碳簇和含氮五元环-吡咯环.
参考文献
| [1] | Peng, J.;Gao, W.;Gupta, B.K.;Liu, Z.;Romero-Aburto, R.;Ge, L.;Song, L.;Alemany, L.B.;Zhan, X.;Gao, G.;Vithayathil, S.A.;Kaipparettu, B.A.;Marti, A.A.;Hayashi, T.;Zhu, J.-J.;Ajayan, P.M..Graphene quantum dots derived from carbon fibers[J].Nano letters,20122(2):844-849. |
| [2] | Zhu, S.;Zhang, J.;Qiao, C.;Tang, S.;Li, Y.;Yuan, W.;Li, B.;Tian, L.;Liu, F.;Hu, R.;Gao, H.;Wei, H.;Zhang, H.;Sun, H.;Yang, B..Strongly green-photoluminescent graphene quantum dots for bioimaging applications[J].Chemical communications,201124(24):6858-6860. |
| [3] | Mo Zhang;Linling Bai;Weihu Shang.Facile synthesis of water-soluble, highly fluorescent graphene quantum dots as a robust biological label for stem cells[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,201215(15):7461-7467. |
| [4] | Benvidi, Ali;Rajabzadeh, Nooshin;Mazloum-Ardakani, Mohammad;Heidari, Mohammad M..Comparison of impedimetric detection of DNA hybridization on chemically and electrochemically functionalized multi-wall carbon nanotubes modified electrode[J].Sensors and Actuators, B. Chemical,2015Pt.A(Pt.A):673-682. |
| [5] | Ying Wang;Li Zhang;Ru-Ping Liang;Jian-Mei Bai;Jian-Ding Qiu.Using Graphene Quantum Dots as Photoluminescent Probes for Protein Kinase Sensing[J].Analytical chemistry,201319(19):9148-9155. |
| [6] | Nurunnabi, M.;Khatun, Z.;Reeck, G.R.;Lee, D.Y.;Lee, Y.-K..Near infra-red photoluminescent graphene nanoparticles greatly expand their use in noninvasive biomedical imaging[J].Chemical communications,201344(44):5079-5081. |
| [7] | Jianhua Shen;Yihua Zhu;Xiaoling Yang.One-pot hydrothermal synthesis of graphene quantum dots surface-passivated by polyethylene glycol and their photoelectric conversion under near-infrared light[J].New Journal of Chemistry,20121(1):97-101. |
| [8] | Kim, S.;Hwang, S.W.;Kim, M.-K.;Shin, D.Y.;Shin, D.H.;Kim, C.O.;Yang, S.B.;Park, J.H.;Hwang, E.;Choi, S.-H.;Ko, G.;Sim, S.;Sone, C.;Choi, H.J.;Bae, S.;Hong, B.H..Anomalous behaviors of visible luminescence from graphene quantum dots: Interplay between size and shape[J].ACS nano,20129(9):8203-8208. |
| [9] | Wang, Y.;Shao, Y.;Matson, D.W.;Li, J.;Lin, Y..Nitrogen-doped graphene and its application in electrochemical biosensing[J].ACS nano,20104(4):1790-1798. |
| [10] | Yuhua Xue;Jun Liu;Hao Chen.Nitrogen-Doped Graphene Foams as Metal-Free Counter Electrodes in High-Performance Dye-Sensitized Solar Cells[J].Angewandte Chemie,201248(48):12124-12127. |
| [11] | Ziyin Lin;Gordon H. Waller;Yan Liu.Simple preparation of nanoporous few-layer nitrogen-doped graphene for use as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions[J].Carbon: An International Journal Sponsored by the American Carbon Society,2013:130-136. |
| [12] | Dengyu Pan;Jingchun Zhang;Zhen Li;Minghong Wu.Hydrothermal Route for Cutting Graphene Sheets into Blue-Luminescent Graphene Quantum Dots[J].Advanced Materials,20106(6):734-738. |
| [13] | Zhou, X.;Zhang, Y.;Wang, C.;Wu, X.;Yang, Y.;Zheng, B.;Wu, H.;Guo, S.;Zhang, J..Photo-Fenton reaction of graphene oxide: A new strategy to prepare graphene quantum dots for DNA cleavage[J].ACS nano,20128(8):6592-6599. |
| [14] | Liu, R.;Wu, D.;Feng, X.;Müllen, K..Bottom-up fabrication of photoluminescent graphene quantum dots with uniform morphology[J].Journal of the American Chemical Society,201139(39):15221-15223. |
| [15] | Yongqiang Dong, Jingwei Shao;Congqiang Chen;Hao Li.Blue luminescent graphene quantum dots and graphene oxide prepared by tuning the carbonization degree of citric acid[J].Carbon: An International Journal Sponsored by the American Carbon Society,201212(12):4738-4743. |
| [16] | Juhan Kim;Jung Sang Suh.Size-Controllable and Low-Cost Fabrication of Graphene Quantum Dots Using Thermal Plasma Jet[J].ACS nano,20145(5):4190-4196. |
| [17] | Goki Eda;Yun-Yue Lin;Cecilia Mattevi;Hisato Yamaguchi;Hsin-An Chen;I-Sheng Chen;Chun-Wei Chen;Manish Chhowalla.Blue Photoluminescence from Chemically Derived Graphene Oxide[J].Advanced Materials,20104(4):505-509. |
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