Luminescent AIZS-GO nanocomposites as fluorescent probe for detecting copper (II) ion

6th conference on Advances in Optoelectronics and Micro/nano-optics

Yongfeng, Liu^1 ; Ming, Deng^1,2 ; Xiaosheng, Tang^1 ; Tao, Zhu^1

Key Laboratory of Optoelectronic Technology and Systems, Ministry of Education), Chongqing University, Chongqing

400044, China^1

Guangxi Colleges and Universities, Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronic Technology, Guilin

541000, China^2

关键词: Concentration ranges;    Copper ions;    Fluorescence probes;    Fluorescent probes;    Watersoluble;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/844/1/012035/pdf
DOI  :  10.1088/1742-6596/844/1/012035

来源: IOP

【 摘 要 】

A selective copper (II) sensor based on graphene oxide (GO) modified Ag-In-Zn-S (AIZS) quantum dots (QDs) was proposed. The fluorescence of the water-soluble AIZS QDs was quenched after addition of Cu2+ion, which was triggered by the aggregation of the QDs in the form of R-COO-(Cu2+)-OOC-R, as verified by the TEM and FTIR. The fluorescence probe can be applied to detect Cu2+ion in a wide concentration range of 0-850 μM based on the degree of fluorescence quenching, with its limitation of detection (LOD) and R2of 0.18μM and 0.99, respectively. Moreover, the nanosensor can distinguish Cu2+ion from other ions, offering great potentials in copper (II) determination in drinking water.