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

IF 8 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical Pub Date : 2024-11-02 DOI:10.1016/j.snb.2024.136877

Yuhao Lu, Xiuxiu Dong, Guanya Ji, Xuejing Wang, Tao Wang, Chengshun Tang, Oluwafunmilola Ola, Hongwei Duan, Qian Liu, Qijian Niu

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Abstract

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 × 10^-9 - 1.00 × 10^-5M with the limit of detection (LOD) of 1.47 × 10^-10M for the CL mode and a detection range of 1.00 × 10^-11 -1.00 × 10^-7M with the LOD of 1.84 × 10^-12M 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.

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通过 "瓶中船 "策略在 NH2-MIL-88B 内锚定碳点，实现比色-荧光传感器的双信号增强

由于过度使用，土霉素（OTC）污染的增加已成为生态稳定和人类健康的重大风险。因此，开发精确可靠的痕量 OTC 检测传感器至关重要。本研究开发了一种用于 OTC 检测的比色-荧光（CL-FL）双模式传感器。首先，采用 "瓶中船 "的方法在 MOFs 复合材料（CDs@NH2-MIL-88B）的空腔中构建了新型碳点，增强了过氧化物酶样活性和荧光强度。然后，结合表面分子印迹聚合物（MIP），构建了双模式传感器（CDs@NH2-MIL-88B@rMIP），提高了选择性。最后，该传感器的双信号增强机制来自于 OTC 与识别结合位点之间的相互作用，分别涉及压印腔和 CDs@NH2-MIL-88B 的强氢键和金属络合。制备的传感器在 CL 模式下的线性检测范围为 1.00 × 10-9 - 1.00 × 10-5 M，检测限为 1.47 × 10-10 M；在 FL 模式下的检测范围为 1.00 × 10-11 -1.00 × 10-7 M，检测限为 1.84 × 10-12 M。同时，该传感器在 OTC 检测中表现出较高的灵敏度、准确度和可靠性。总之，这项工作为抗生素和其他有害污染物的检测提供了一种前景广阔的具有信号发射功能的 CL-FL 双模式传感系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sensors and Actuators B: Chemical 工程技术-电化学

CiteScore

14.60

自引率

11.90%

发文量

1776

审稿时长

3.2 months

期刊介绍： Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.