Analysis of Nitrogen-Doped Carbon Quantum Dots in Aqueous and Soil Environments for the Presence of Hg2+

作     者：Min, Xin Wu, Zitong Liu, Shuyu 

作者机构：School of Environment and Chemical Engineering Shanghai University Shanghai201800 China Shanghai Zhixi Technology Co. Ltd Shanghai201815 China Shaanxi Key Laboratory of Environmental Monitoring and Forewarning of Trace Pollutants ShaanXi Xi'An710054 China 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Semiconductor quantum dots 

摘      要：In this study, a nitrogen-doped blue fluorescent carbon quantum dots (N-CQDs) system was constructed to characterize Hg in the environment. Spectroscopic analysis showed that it has good photoluminescence and stability, and contains various functional groups on the surface. The optimal reaction conditions for the detection of Hg2+ by N-CQDs were pH 7, reaction temperature 25 °C, and reaction time 5 min. The ion selectivity and anti-interference experiments proved that it has good sensitivity and selectivity. The linear relationship between the analytical system of N-CQDs and the concentration of Hg2+ was used to construct the corresponding calculation equations, and the correlation coefficients were 0.994, and the limit of detection (LOD) values were 3.271 μM, respectively. The method can be used to detect Hg2+ in the aqueous and soil environments, and the recoveries were in the range of 96.7-105.2%. Finally, the comprehensive analysis showed that the fluorescence quenching mechanism was static quenching. © 2024, The Authors. All rights reserved.