Integrating Intelligent Logic Gate Dual-Nanozyme Cascade Fluorescence Capillary Imprinted Sensors for Ultrasensitive Simultaneous Detection of 2,4-Dichlorophenoxyacetic Acid and 2,4-Dichlorophenol

被引:12
作者
Chen, Yu [1 ,2 ]
Tang, Kangling [1 ,2 ]
Zhou, Qin [1 ,2 ]
Wang, Xiangni [1 ,2 ]
Wang, Ruoyan [1 ,2 ]
Zhang, Zhaohui [1 ,2 ,3 ]
机构
[1] Changsha Univ, Coll Biol & Chem Engn, Changsha 410022, Peoples R China
[2] Jishou Univ, Coll Chem & Chem Engn, Jishou 416000, Hunan, Peoples R China
[3] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Peoples R China
基金
中国国家自然科学基金;
关键词
METABOLITES;
D O I
10.1021/acs.analchem.3c03571
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Herein, a dual-nanozyme cascade catalysis triemission fluorescence capillary imprinted sensor integrated with intelligent logic gates was constructed for simultaneous detection of 2,4-dichlorophenoxyacetic acid (2,4-DA) and 2,4-dichlorophenol (2,4-DCP). The novel nanozyme fluorescence organic framework (Bi, Co-MOF) was grafted on the surface of Fe3O4 modified with histidine to form a nanozyme composite (FBM) with dual-enzyme activity, which was imprinted with 2,4-DA to prepare a fluorescence molecularly imprinted polymer (FBM@MIP). Carbon dots (CDs) coupling with FBM@MIP (FBM@MIP/CDs) was inhaled into a capillary to construct a dual-nanozyme capillary imprinted sensor directly. The FBM@MIP/CDs capillary sensor realized to detect 2,4-DA and 2,4-DCP simultaneously within a linear concentration range of 1.0 x 10(-12)-1.2 x 10(-9) M and 1.0 x 10(-12)-4.8 x 10(-9) M with the detection limit of 0.75 and 0.68 pM, respectively. Interestingly, a smartphone-assisted portable capillary fluorescence intelligent sensing platform was developed that can detect 2,4-DA and 2,4-DCP visually without tedious operations such as soaking and drying. Combined with a smartphone, the linear relationships between RGB ratios and concentrations of 2,4-DA and 2,4-DCP were established with the detection limit of 0.93 and 0.81 pM, respectively. The integrated logic gates provided a promising way for intelligent sensing of multiple targets simultaneously, which provided a new strategy for ultrasensitive simultaneous detection of multiple pollutants with a microvolume (18 mu L/time) in complex environments.
引用
收藏
页码:18139 / 18148
页数:10
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