Anchor carbon dots inside NH2-MIL-88B via ship-in-a-bottle strategy for dual signal enhancement in colorimetric-fluorescent sensors

被引：0

作者：

Lu, Yuhao ^{[1
]}

Dong, Xiuxiu ^{[1
]}

Ji, Guanya ^{[1
]}

Wang, Xuejing ^{[1
]}

Wang, Tao ^{[1
]}

Tang, Chengshun ^{[1
]}

Ola, Oluwafunmilola ^{[2
]}

Duan, Hongwei ^{[3
]}

Liu, Qian ^{[1
]}

Niu, Qijian ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Agr Engn, Key Lab Modern Agr Equipment & Technol, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Univ Nottingham, Adv Mat Res Grp, Nottingham NG7 2RD, England

[3] ShiHezi Univ, Coll Mech & Elect Engn, Shihezi 832000, Xinjiang, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2025年 / 424卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Metal-organic frameworks; CDs; Dual-mode sensor; Colorimetric; fluorescent; Dual signal-on; Oxytetracycline; NANOPARTICLES;

D O I：

10.1016/j.snb.2024.136877

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The increase in oxytetracycline (OTC) pollution has become a significant risk to ecological stability and human health because of excessive use. Therefore, developing a precise and reliable sensor for trace OTC detection is critical. In this work, a dual-mode sensor of colorimetric-fluorescent (CL-FL) with dual signal-on was developed for OTC detection. Firstly, a novel carbon dots encapsulating in cavities of MOFs composite (CDs@NH2-MIL-88B) was constructed by the ship-in-a-bottle approach, which enhanced peroxidase-like activity and fluorescent intensity. Further, combining with surface molecularly imprinted polymer (MIP), the dual-mode sensor was constructed to develop selectivity (CDs@NH2-MIL-88B@rMIP). Finally, the dual signal enhancement mechanism of the sensor comes from the interaction between OTC and identifying binding site involving strong hydrogen bonding and metal complexation from imprinted cavity and CDs@NH2-MIL-88B, respectively. The prepared sensor has a linear detection range of 1.00 x 10-9 - 1.00 x 10-5 M with the limit of detection (LOD) of 1.47 x 10-10 M for the CL mode and a detection range of 1.00 x 10-11 -1.00 x 10- 7M with the LOD of 1.84 x 10-12 M for the FL mode. Meanwhile, the sensor shows high sensitivity, accuracy and reliability in OTC detection. Overall, this work provides a promising CL-FL dual-mode sensing systems with signal-on in the detection of antibiotics and other hazardous pollutants.

引用

页数：11