Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 190, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2019.110141
Keywords
Carbon dots; Hg2+ Ions detection; Hydrothermal reaction; Multi-color; Water pollution; Environmental pollution and health
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Funding
- National Natural Science Foundation of China [61574063, 11974122]
- Science and Technology Program of Guangdong Province, China [2017A050506047]
- Guangzhou Science and Technology Project [201904010399]
- Science and Technology Development Fund from Macau SAR [FDCT 084/2016/A2]
- University of Macau [MYRG-00149-FST]
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Two kinds of carbon quantum dots (CQDs), having luminous peaks at 480 and 525 nm, were obtained by a single-step hydrothermal method. The detection of Hg2+ by two kinds of carbon dots was further explored. In order to compensate for the weak luminescence of blue carbon dots (480 nm) and low sensitivity of green carbon dots (525 run), mixed carbon dots were examined for Hg2+ detection. The mixed carbon dots showed a better detection of Hg2+ ions. Low detection limit of 0.05 mu M was found to be in the range of 0-1.0 mu M of Hg2+. Moreover, in this range, the change of fluorescence intensity can be clearly seen under the ultraviolet lamp, which will be conducive for the practical application of detecting mercury ions with carbon dots.
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