A turn-on ratiometric fluorescent nanoprobe based on AgInZnS and nitrogen-doped graphene quantum dots for Cd2+ detection in lake water

Excessive Cd 2+ poses adverse influences on ecosystem and human beings, but its precise detection via a facile and environment-friendly method with resistance to interference is still a challenge. Here, a turn-on ratiometric fluorescent nanoprobe for Cd 2+ detection is established using yellow-emiss...

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Bibliographic Details
Published in:	Journal of materials science 2022-09, Vol.57 (36), p.17336-17346
Main Authors:	Liu, Yongfeng, Gao, Zhaoju, Shao, Xiuwen, Yang, Jinpeng, Tang, Xiaosheng, Wang, Jia, Chen, Weiwei, Lin, Hao, Deng, Ming, Zhu, Tao
Format:	Article
Language:	eng
Subjects:	Cadmium Characterization and Evaluation of Materials Chemistry and Materials Science Classical Mechanics Crystallography and Scattering Methods Electronic Materials Emission Fluorescence Graphene Interference Materials Science Nitrogen Polymer Sciences Quantum dots Reference signals Solid Mechanics Surface defects Water sampling
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Summary:	Excessive Cd 2+ poses adverse influences on ecosystem and human beings, but its precise detection via a facile and environment-friendly method with resistance to interference is still a challenge. Here, a turn-on ratiometric fluorescent nanoprobe for Cd 2+ detection is established using yellow-emission AgInZnS quantum dots (AIZS QDs) and blue-emission nitrogen-doped graphene quantum dots (NGQDs), which serve as a recognition unit and internal reference signal, respectively. Cd 2+ could enhance the fluorescence of AIZS QDs due to the passivation of surface defects, while it has no significant effect on that of NGQDs. This nanoprobe has a large detection range from 0.5 to 100 µM and a limit of detection low to 28.6 nM. It shows strong anti-interference ability for Cd 2+ even in lake water samples with recovery from 98 to 101% and low relative standard deviation of 1.01%, indicating its excellent effectuation to real-application world. Graphical abstract
ISSN:	0022-2461 1573-4803