一种简便的微波辅助制备荧光氮化碳量子点及其在汞离子检测中的应用。
A facile microwave-assisted fabrication of fluorescent carbon nitride quantum dots and their application in the detection of mercury ions.
作者信息
Cao Xiaotong, Ma Jie, Lin Yanping, Yao Bixia, Li Feiming, Weng Wen, Lin Xiuchun
机构信息
College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, China; Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology, Zhangzhou 363000, China.
College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, China; Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology, Zhangzhou 363000, China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Dec 5;151:875-80. doi: 10.1016/j.saa.2015.07.034. Epub 2015 Jul 8.
A facile microwave-assisted solvothermal method was used to prepare fluorescent carbon nitride quantum dots (CNQDs) using oleic acid as the reaction media at moderate reaction temperature in a short time (5 min). Citric acid monohydrate and urea were used as the precursors. The as-prepared CNQDs were characterized by multiple analytical techniques. The CNQDs exhibited an uncommon excitation wavelength-dependent fluorescence with two maximum emission peaks at 450 and 540 nm. The CNQDs with a quantum yield of 27.1% could serve as an effective fluorescent sensing platform for label-free sensitive detection of Hg(2+) ions with a detection limit of 0.14 μM. This method was also applied to the detection of Hg(2+) ions in tap water samples.
采用一种简便的微波辅助溶剂热法，以油酸为反应介质，在适中的反应温度下短时间内（5分钟）制备荧光氮化碳量子点（CNQDs）。使用一水柠檬酸和尿素作为前驱体。通过多种分析技术对所制备的CNQDs进行表征。CNQDs表现出罕见的激发波长依赖性荧光，在450和540 nm处有两个最大发射峰。量子产率为27.1%的CNQDs可作为一种有效的荧光传感平台，用于无标记灵敏检测Hg(2+)离子，检测限为0.14 μM。该方法还应用于自来水样品中Hg(2+)离子的检测。
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