绿色方法合成纳米碳点及对Fe<sup>3+</sup>的特异性荧光检测

张艺; 邢晶晶; 孙思佳; 吴頔; 曾乐勇

doi:doi:10.37188/cjl.20200174

发光学报, 2020, 41 (10): 1249, 网络出版: 2020-11-25

绿色方法合成纳米碳点及对Fe³⁺的特异性荧光检测

Green Synthesis of Carbon Nanodots and Their Application in Specific Fluorescence Detection of Fe³⁺

论文大纲

张艺邢晶晶孙思佳吴頔曾乐勇

作者单位

河北大学化学与环境科学学院, 河北保定 071002

纳米碳点水热法黄瓜绿色合成 Fe3+荧光检测 carbon nanodots hydrothermal method cucumber green synthesis Fe3+ fluorescent detection

摘要

以黄瓜为原料, 采用水热法合成了荧光纳米碳点, 实现了对Fe3+的特异性荧光检测。利用透射电子显微镜和X射线光电子能谱仪对纳米碳点的形貌和微结构进行了表征, 并利用荧光光谱仪对纳米碳点的荧光性能以及加入不同金属离子后的荧光强度变化进行了测量。结果表明, 合成的纳米碳点分散性良好, 尺寸约为3 nm左右。在365 nm紫外光激发下, 其发射峰位于435 nm; 当反应温度为200 ℃、反应时间为12 h时, 纳米碳点的荧光性能最佳。Fe3+的加入能猝灭纳米碳点的荧光, 而其他金属离子不会引起纳米碳点荧光强度和发射峰位置的改变, 表明绿色方法合成的纳米碳点实现了对Fe3+的特异性荧光检测。

Abstract

Using cucumber as raw material, fluorescent carbon nanodots were synthesized via hydrothermal method, by which the specific fluorescent detection of Fe3+ was achieved. The morphology and microstructure of carbon nanodots were characterized by transmission electron microscope and X-ray photoelectron spectroscope, and the fluorescent performance of carbon nanodots was measured by fluorescent spectroscope. The results indicated that the prepared carbon nanodots showed good dispersity, and the average size was about 3 nm. When the reaction temperature was 200 ℃ and the reaction time was 12 h, the prepared carbon nanodots have the optimum fluorescent performance. Moreover, the introduction of Fe3+ can quench the fluorescence of carbon nanodots, but other metal ions can not change the fluorescence intensity and emission wavelength of carbon nanodots, which indicates that the prepared carbon nanodots achieve specific fluorescence detection towards Fe3+.

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张艺, 邢晶晶, 孙思佳, 吴頔, 曾乐勇. 绿色方法合成纳米碳点及对Fe³⁺的特异性荧光检测[J]. 发光学报, 2020, 41(10): 1249. ZHANG Yi, XING Jing-jing, SUN Si-jia, WU Di, ZENG Le-yong. Green Synthesis of Carbon Nanodots and Their Application in Specific Fluorescence Detection of Fe³⁺[J]. Chinese Journal of Luminescence, 2020, 41(10): 1249.

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