高等学校化学学报2024，Vol.45Issue(5)：38-45,8.DOI:10.7503/cjcu20230504
基于N掺杂Ti3C2 MXene量子点的荧光探针用于Hg2+和S2-的传感检测
Fluorescent Probe for Detection of Hg2+ and S2-Based on N-Doped Ti3C2 MXene Quantum Dots
摘要
Abstract
A novel fluorescent"on-off-on"method for the detection of Hg2+ and S2-was developed based on N-doped Ti3C2 MXene quantum dots(N-Ti3C2 MQDs)and complexation.The prepared N-Ti3C2 MQDs emitted blue fluorescence(λem=440 nm)with a fluorescence quantum yield of 15.7%.Hg2+ can selectively coordinate with functional groups of—NH2,—COOH,and—OH on the surface of N-Ti3C2 MQDs through electrostatic interaction,resulting in fluorescent quenching of the N-Ti3C2 MQDs system.After the addition of S2-,HgS precipitation is formed due to the strong binding force between S2-and Hg2+,leading to the fluorescent recovery of the N-Ti3C2 MQDs.Based on this principle,a fluorescent"on-off-on"sensing method was constructed to quantitatively detect Hg2+ and S2-.The fluores-centy of the N-Ti3C2 MQDs probe is proportional to Hg2+ and S2-concentrations in the range of 0.02-200 μmol/L and 0.07-150 μmol/L,with a detection limit of 10 nmol/L and 30 nmol/L(S/N=3),respectively.This proposed method has the advantages of low cost,simple operation,high sensitivity,and good selectivity,which has been used for the determination of Hg2+ and S2-in real water samples.关键词
汞离子/硫离子/N掺杂Ti3C2 MXene/量子点/荧光探针Key words
Hg2+/S2-/N-Doped Ti3C2 MXene/Quantum dot/Fluorescent probe分类
化学化工引用本文复制引用
张慧莲,杨新杰,李军,李泉,张福娟,张艳丽,王红斌,杨文荣,庞鹏飞..基于N掺杂Ti3C2 MXene量子点的荧光探针用于Hg2+和S2-的传感检测[J].高等学校化学学报,2024,45(5):38-45,8.基金项目
国家自然科学基金(批准号:21565031,21665027)、云南省科技厅应用基础研究基金项目(批准号:202001AT070012)和云南民族大学研究生科研创新基金项目(批准号:2023SKY028)资助. Supported by the National Natural Science Foundation of China(Nos.21665027,21565031),the Applied Basic Research Project of Yunnan Provincial Science and Technology Department,China(No.202001AT070012)and the Graduate Scientific Research Foundation of Yunnan Minzu University,China(No.2023SKY028). （批准号:21565031,21665027）
