二维共价有机框架约束 0D 碳量子点薄膜的协同效应:实现用于检测四环素的分子印迹阴极光电化学平台。

IF 10.7 1区 生物学 Q1 BIOPHYSICS
Mengge Zhang, Xiuxiu Dong, Guanya Ji, Jing Wang, Tao Wang, Qian Liu, Qijian Niu
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引用次数: 0

摘要

高光活性阴极材料的开发以及稳定界面的形成被认为是选择性和灵敏性四环素(TC)光电化学(PEC)检测的重要因素。根据这一思路,本研究采用快速原位聚合方法,在室温下成功合成了一种新型 II 型异质结构,该异质结构由二维(2D)共价有机框架与零维(0D)碳量子点薄膜(CDs/COFs)组成。通过提高光吸收和电子传递能力,CDs/COFs 的 PEC 信号被显著放大。此外,通过在电极上快速原位紫外线(UV)光聚合,构建了用于检测 TC 的阴极分子印迹 PEC 传感器(MIP-PEC)。最后,基于对印迹空腔的选择性识别和立体阻碍增加机制,实现了 PEC 阴极信号的 "关闭"。在最佳条件下,所提出的传感器在 5.00 × 10-12-1.00 × 10-5 M 浓度范围内与 TC 呈宽线性关系,检测限低至 6.00 × 10-13 M。我们的工作为制造高光活性阴极异质结和均匀稳定的选择性 MIP-PEC 传感界面提供了一种有效而快速的原位构建方法,从而实现对环境中抗生素的精确检测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synergistic effect of 2D covalent organic frameworks confined 0D carbon quantum dots film: Toward molecularly imprinted cathodic photoelectrochemical platform for detection of tetracycline.

The development of high photoactive cathode materials combined with the formation of a stable interface are considered important factors for the selective and sensitive photoelectrochemical (PEC) detection of tetracycline (TC). Along these lines, in this work, a novel type II heterostructure composed of two-dimensional (2D) covalent organic frameworks confined to zero-dimensional (0D) carbon quantum dots (CDs/COFs) film was successfully synthesized using the rapid in-situ polymerization method at room temperature. The PEC signal of CDs/COFs was significantly amplified by improving the light absorption and electron transfer capabilities. Furthermore, a cathodic molecularly imprinted PEC sensor (MIP-PEC) for the detection of TC was constructed through fast in-situ Ultraviolet (UV) photopolymerization on the electrode. Finally, a "turn-off" PEC cathodic signal was achieved based on the selective recognition of the imprinted cavity and the mechanism of steric hindrance increase. Under optimal conditions, the proposed sensor demonstrated a wide linear relationship with TC in the concentration range of 5.00 × 10-12-1.00 × 10-5 M, with a detection limit as low as 6.00 × 10-13 M. Meanwhile, excellent stability, selectivity, reproducibility, and applicability in real river samples was recorded. Our work provides an effective and rapid in situ construction method for fabricating highly photoactive cathode heterojunctions and uniform stable selective MIP-PEC sensing interfaces, yielding accurate antibiotics detection in the environment.

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来源期刊
Biosensors and Bioelectronics
Biosensors and Bioelectronics 工程技术-电化学
CiteScore
20.80
自引率
7.10%
发文量
1006
审稿时长
29 days
期刊介绍: Biosensors & Bioelectronics, along with its open access companion journal Biosensors & Bioelectronics: X, is the leading international publication in the field of biosensors and bioelectronics. It covers research, design, development, and application of biosensors, which are analytical devices incorporating biological materials with physicochemical transducers. These devices, including sensors, DNA chips, electronic noses, and lab-on-a-chip, produce digital signals proportional to specific analytes. Examples include immunosensors and enzyme-based biosensors, applied in various fields such as medicine, environmental monitoring, and food industry. The journal also focuses on molecular and supramolecular structures for enhancing device performance.
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