Carbon Dots as“On–Off–On”Fluorescence Sensors for Selective and Consecutive Detection of 4-Nitrophenol and Cerium(IV)in Water Samples  

作　　者：Jing Yang Hao Liu Yan Huang Li Li Huajie Liu Yaping Ding 

机构地区：[1]Department of Chemistry,College of Sciences,Shanghai University,Shanghai,200444,China [2]School of Chemical Science and Engineering,Tongji University,Shanghai,200092,China

出　　处：《Journal of Analysis and Testing》2024年第2期201-209,共9页分析检测（英文）

基　　金：National Natural Science Foundation of China(22274096 and 22272119);the Shanghai Municipal Science and Technology Major Project(2021SHZDZX0100);the Science and Technology Committee of Shanghai Municipality(2022-4-ZD-03);the Shanghai Pilot Program for Basic Research;the Fundamental Research Funds for the Central Universities。

摘　　要：An“on–off–on”fluorescence sensor was designed for rapidly and consecutively detecting 4-nitrophenol and cerium(IV)without the use of any labeling materials.The yellow carbon dots were synthesized by a simple one-step hydrothermal approach,and various techniques were applied to investigate the morphology,structure,and optical properties of the carbon dots.Under the optimal experimental conditions,4-nitrophenol rapidly quenched the fluorescence of carbon dots as a result of the inner filter eff ect(IFE).The fluorescence intensity of carbon dots was linear with the concentration of 4-nitrophenol(1–150μmol/L)and the limit of detection was 0.32μmol/L.The fluorescence was gradually recovered as the cerium(IV)concentration(0.5–100μmol/L)increased in CDs/4-NP,and the limit of detection was 0.16μmol/L.The sensor showed good selectivity and demonstrated high accuracy for the analysis of 4-nitrophenol and cerium(IV)in actual water samples.

关 键 词：Carbon dots Fluorescence sensor 4-NITROPHENOL Cerium(IV) Water samples 

分 类 号：O657.3[理学—分析化学] TP212[理学—化学] X832[自动化与计算机技术—检测技术与自动化装置]