| 一步法合成富氧基团石墨烯量子点及光致发光特性(英文) |
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| 引用本文： | 代云茜,孙贻白,龙欢,柴蕴玲,孙岳明.一步法合成富氧基团石墨烯量子点及光致发光特性(英文)[J].东南大学学报,2014(4):520-525. |
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| 作者姓名： | 代云茜 孙贻白 龙欢 柴蕴玲 孙岳明 |
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| 作者单位： | 东南大学化学化工学院,南京,211189 |
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| 基金项目： | The National Basic Research Program of China 973 Program No．2013CB932902 the National Natural Science Founda-tion of China No．2120103421173042 the Fundamental Research Funds for the Central Universities No．3207044403． |
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| 摘 要： | 为获得独特的光致发光特性的碳基量子点,以氧化石墨烯(GOs)为前驱物,采用水热反应合成了一类富氧官能团修饰的石墨烯量子点(GQDs).TEM和AFM表征GQDs平均粒径为(5.02±0.92)nm,厚度为0.6 nm.GQDs呈现特有的光致发光峰位随激发波长移动的特性,其光致发光机理来源于量子点边缘的类卡宾zigzag活性位.由于Fe3+与GQDs表面羟基的配位作用使GQDs呈现出对Fe3+离子检测的高灵敏度和快速响应,有望成为高效检测Fe3+离子的新型荧光探针.
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| 关 键 词： | 石墨烯 量子点 光致发光 富氧官能团 |
One-pot facile synthesis of highly photoluminescent graphene quantum dots with oxygen-rich groups |
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| Dai Yunqian,Sun Yibai,Long Huan,Chai Yunling,Sun Yueming.One-pot facile synthesis of highly photoluminescent graphene quantum dots with oxygen-rich groups[J].Journal of Southeast University(English Edition),2014(4):520-525. |
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| Authors: | Dai Yunqian Sun Yibai Long Huan Chai Yunling Sun Yueming |
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| Institution: | (School of Chemistry and Chemical Engineering, Southeast University, Nanjing 2 l 1189, China) |
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| Abstract: | To achieve a new type of carbon-based quantum dots with unique photoluminescence PL a simple approach for fabrication of graphene quantum dots GQDs with oxygen-rich groups was developed via the hydrothermal reaction by using graphene oxides GOs as a precursor. Transmission electron microscope TEM and atomic force microscope AFM characterizations confirmed that the sizes and heights of GQDs were 5.02±0.92 nm and 0.6 nm respectively.A strong PL emission exhibited unique excitation wavelength dependent features.Also the carbene-like free zigzag edge sites were proposed to be the origin of the strong PL emission.The GQDs were demonstrated to be a superior probe for Fe3＋ detection in aqueous solution with a high sensitivity and feasibility due to the special coordinate interaction between Fe3＋and the phenolic hydroxyl group at GQDs. |
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| Keywords: | graphene quantum dots photoluminescence oxygen-rich groups |
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