Optical fiber fluorescence probe for chloride ion detection based on graphitic carbon nitride quantum dot-doped hydrogel  

作　　者：Xia Li Sicheng Ke Chenxiao Wang Wa Jin Xinghu Fu Guangwei Fu Weihong Bi 李霞;柯思成;王晨晓;金娃;付兴虎;付广伟;毕卫红

机构地区：[1]School of Information Science and Engineering,Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province,Yanshan University,Qinhuangdao 066004,China [2]Zhongshan Institute of Changchun University of Science and Technology,Zhongshan 528400,China

出　　处：《Chinese Optics Letters》2025年第1期13-18,共6页中国光学快报(英文版)

基　　金：supported by the National Key Research and Development Program of China(No.2019YFC1407900);the Natural Science Foundation of Hebei Province(No.F2021203058)。

摘　　要：We conducted an experimental study on an off-on fluorescence optical fiber probe utilizing graphitic carbon nitride quantum dots(g-CNQDs)-doped hydrogel for chloride ion detection.It resulted in fluorescence quenching after g-CNQDs were modulated by silver ions(Ag+).The chloride ion sensing probe was obtained by wrapping the tapper fiber tip with the composite fluorescent material of g-CNQDs/Ag+mixed with chitosan hydrogel.Within the concentration range of 1–9μM chloride ions,the fluorescence intensity of the prepared optical fiber probe exhibits a robust linear correlation with chloride ion concentration,and the detection limit is 0.037μM.

关 键 词：optical fiber probe carbon nitride dot chloride ion off-on fluorescence 

分 类 号：O657.3[理学—分析化学]