一步法合成多色碳量子点用于宏观检测 Hg。
Single-step synthesis of polychromatic carbon quantum dots for macroscopic detection of Hg.
机构信息
Institute of Semiconductor Science and Technology, South China Normal University, Guangzhou, 510631, China.
Instituted of Applied Physics and Materials Engineering, University of Macau, 999078, Macau.
出版信息
Ecotoxicol Environ Saf. 2020 Mar 1;190:110141. doi: 10.1016/j.ecoenv.2019.110141. Epub 2020 Jan 2.
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 Hg 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 nm), mixed carbon dots were examined for Hg detection. The mixed carbon dots showed a better detection of Hg ions. Low detection limit of 0.05 μM was found to be in the range of 0-1.0 μM of Hg. 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.
两种发光峰分别位于 480nm 和 525nm 的碳量子点（CQDs）可通过一步水热法获得。进一步探索了两种碳点对汞的检测。为了弥补蓝色碳点（480nm）发光较弱和绿色碳点（525nm）灵敏度低的问题，对混合碳点进行了汞检测。混合碳点对汞离子的检测效果更好。在 0-1.0μM 的汞范围内，发现其检测下限低至 0.05μM。此外，在该范围内，在紫外灯下可以清楚地看到荧光强度的变化，这将有利于碳点检测汞离子的实际应用。
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