Sensitive and selective fluorescence detection of aqueous uranyl ions using water-soluble CdTe quantum dots |
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| Authors: | Xinfeng Chen Kui Zhang Huan Yu Long Yu Hongwei Ge Ji Yue Tianxin Hou Abdullah M Asiri Hadi M Marwani Suhua Wang |
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| Institution: | 1.School of Environment and Chemical Engineering,North China Electric Power University,Beijing,China;2.Institute of Intelligent Machines,Chinese Academy of Sciences,Hefei,China;3.Chemistry Department, Faculty of Science,King Abdulaziz University,Jeddah,Saudi Arabia |
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| Abstract: | Herein we report a fluorescent method for sensitive and selective detection of uranyl ions using CdTe quantum dots functionalized with mercaptopropionic acid, which the fluorescence of the quantum dots could be quantitatively quenched through electron transfer mechanism. The detection limit of the method was estimated to be 4 nM, less than the maximum allowed content of 130 nM for uranyl in drinking water defined by the U.S. Environmental Protection Agency. Furthermore, the probe was successfully applied in detection of uranyl ions in real samples, demonstrating its potential practical applications for monitoring of uranyl ions in environment. |
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