一种基于电压分辨双信号输出的便携式电化学传感器，用于氯霉素的测定

IF 11.3 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Hazardous Materials Pub Date : 2025-02-27 DOI:10.1016/j.jhazmat.2025.137748

Qiao Zhang , Yue Sun , Lei Yu , Xing Gao , Yan Huang , Xiao Sun , Yen Leng Pak , Yurong Guo , Yan Sun , Zhao Wang , Jibin Song

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引用次数: 0

摘要

开发一种能够产生阴极-阳极双光电流信号的比例光电化学（PEC）感光传感器仍然是一个巨大的挑战。在此，我们报道了一种新型的便携式电压分辨比率PEC传感器，用于测定氯霉素（CAP），该传感器具有数字万用表（DMM）和电压电流信号发生器（VCSG）读出器。采用Ru(bpy)32+−BiOBr异质结作为唯一的光活性材料，通过改变偏置电压（+0.1/−0.2 V）在Ⅱ型和Z -方案之间切换，随着CAP浓度的增加，II型（I+0.1）的PEC信号为正，在+0.1 V时减小，而Z -方案（I−0.2）的PEC信号为负，在−0.2 V时增大。由于适体法的选择性和比值法的灵敏度（I−0.2/I+0.1），所制备的适体传感器具有良好的线性检测范围（5.0×10−12 ~ 1.0×10−7 M），检出限为1.2×10−12 M。此外，将该便携式适体传感器用于实际样品中CAP的检测，结果令人满意，为现场分析和食品安全提供了一条有前景的途径。

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A portable photoelectrochemical aptasensor based on voltage−resolved dual−signal output for the determination of chloramphenicol

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A portable photoelectrochemical aptasensor based on voltage−resolved dual−signal output for the determination of chloramphenicol

Developing a ratiometric photoelectrochemical (PEC) aptasensor that can produce cathode−anode dual photocurrent signals is still a great challenge. Herein, we report a novel portable voltage−resolved ratiometric PEC aptasensor for the determination of chloramphenicol (CAP) with a digital multimeter (DMM) and voltage and current signal generator (VCSG) readout. Ru(bpy)₃^2 +−BiOBr heterojunction was employed as the only photoactive material, which is switched between type II and Z − scheme by varying the bias voltage (+0.1/−0.2 V). With the increase of CAP concentration, the PEC signal of type II (I_+0.1) is positive and decreases at + 0.1 V, while the PEC signal of Z − scheme (I_−0.2) is negative and increases at −0.2 V. Due to the selectivity of aptamer method and sensitivity of ratiometric method (I_−0.2/I_+0.1), the as−prepared aptasensor for detecting CAP exhibits an excellent linear detection range from 5.0 × 10⁻¹² to 1.0 × 10⁻⁷ M with a limit of detection of 1.2 × 10⁻¹² M. In addition, this portable aptasensor was used to detect CAP in real samples with satisfactory results, revealing a promising avenue for the on−site analysis and food safety.

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来源期刊

Journal of Hazardous Materials 工程技术-工程：环境

CiteScore

25.40

自引率

5.90%

发文量

3059

审稿时长

58 days

期刊介绍： The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.