期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 151, 期 -, 页码 875-880出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2015.07.034
关键词
Carbon nitride quantum dots; Fluorescent probe; Mercury ions; Citric acid; Urea
类别
资金
- Natural Science Foundation of Fujian Province of China [2012J06005, 2014J01053]
- Education Bureau of Fujian Province of China [JK2011030, JA13195]
- External Foundation of MOE Key Laboratory of Analysis and Detection for Food Safety (Fuzhou University) [FS1307]
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 Hg2+ ions With a detection limit of 0.14 mu M. This method was also applied to the detection of Hg2+ ions in tap water samples. (C) 2015 Elsevier B.V. All rights reserved.
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