Highly fluorescence Ta_(4)C_(3) MXene quantum dots as fluorescent nanoprobe for heavy ion detection and stress monitoring of fluorescent hydrogels  

作　　者：Shouzhen Li Junfei Ma Xuelin Zhao Peide Zhu Meng Xu Yingchun Niu Dixian Luo Quan Xu 

机构地区：[1]State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,National Energy Shale Oil Research and Development Center,China University of Petroleum(Beijing),Beijing 102249,China [2]Department of Musculoskeletal Tumor,Senior Department of Orthopedics,the Fourth Medical Center of PLA General Hospital,Beijing 100142,China [3]Department of Laboratory Medicine,Huazhong University of Science and Technology Union Shenzhen Hospital(Nanshan Hospital),Shenzhen 518000,China

出　　处：《Chinese Chemical Letters》2022年第4期1850-1854,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 81972901);the Key R&D Plan of Chenzhou (No. ZDYF202008);the Discipline Leader Startup Fund of Huazhong University of Science and Technology Union Shenzhen Hospital (No. YN2021002);Science Foundation of China University of Petroleum,Beijing (Nos. 2462019QNXZ02, 2462019BJRC007)。

摘　　要：Compared with other transition metal Mxene derived quantum dots(MQD_(S)),Ta-based Mxene quantum dots have good functionality,but Ta-based Mxene quantum dots and their applications have not been studied so far.In this paper,we report for the first time the synthesis of high fluorescence quantum yield(QY) N-doped Ta_(4)C_(3) quantum dots(N-MQDs) using Ta_(4)C_(3) quantum dots in acid reflux damaged Ta_(4)C_(3) nanosheets as precursors and ethylenediamine as nitrogen source.The prepared N-MQDs have excellent blue photoluminescence(PL) properties,particle size is only 2.60 nm,QY is up to 23.4%,and good stability.In addition,it has been reported that N-MQDs can be used as fluorescent probe for detection of Fe;and remote force sensing analysis In liquid ion sensing,N-MQDS shows a unique selective quenching of Fe;with a detection limit as low as 2 μmol/L,and has great potential as a fast and super-sensitive fluorescent probe for the detection of heavy ion.More importantly,in solid mechanics sensing,the introduction of N-MQDs into self-healing hydrogels can be developed into a fluorescent hydrogel that can be used for accurate remote force measurement and applied in the field of mechanical sensing analysis.Therefore,Ta-based N-MQDs show excellent potential in the field of fluorescence sensing,which provides a door for multi-dimensional sensing of new materials in the future.

关 键 词：MXene quantum dots Fluorescent probe Fluorescent hydrogel Hydrothermal method Quantum yield 

分 类 号：O657.3[理学—分析化学] O648.17[理学—化学]