Sensitive photoelectrochemical aptasensing of Salmonella enteritidis based on AgBiS2 and Ag/g-C3N4 with gold nanoparticles

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-18 DOI:10.1016/j.jphotochem.2024.116093

Yifan Wang , Haoran Cheng , Ze Cheng , Gongliang Zhang , Hongman Hou , Jingran Bi , Shuang Yan , Hongshun Hao

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Abstract

In this paper, an ultrasensitive photoelectric chemical sensor based on AgBiS₂ and Ag/g-C₃N₄ was prepared for the detection of Salmonella enteritidis (SE). The AgBiS₂ and Ag/g-C₃N₄ were modified on FTO by layer modification to increase the photoelectric activity of the electrode, the gold nanoparticles continued to be modified, and the aptamer of SE was fixed by AuS bond to realize the specific detection of SE. Compared with the AgBiS₂-modified electrode, the electrode prepared by the composite material produced a significantly enhanced and stable photocurrent signal under Xe lamp irradiation. The detection limit of sensor was 2.18 CFU/mL, and ideally, the concentration of SE detection would show a good linear relationship between 6.72 × 10³ CFU/mL and 6.72 × 10⁸ CFU/mL. The constructed photoelectrochemical sensor has strong sensitivity, wide linear range, and good selectivity for potential pathogenic bacteria. Therefore, this study provides a very promising photoelectric chemical platform for the detection of SE.

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基于 AgBiS2 和 Ag/g-C3N4 与金纳米粒子的肠炎沙门氏菌灵敏光电化学诱导技术

本文制备了一种基于 AgBiS2 和 Ag/g-C3N4 的超灵敏光电化学传感器，用于检测肠炎沙门氏菌（SE）。在FTO上对AgBiS2和Ag/g-C3N4进行层改性以提高电极的光电活性，继续对金纳米颗粒进行改性，并通过AuS键固定肠炎沙门氏菌的合酶体，实现了对肠炎沙门氏菌的特异性检测。与 AgBiS2 修饰电极相比，复合材料制备的电极在 Xe 灯照射下产生的光电流信号明显增强且稳定。传感器的检测限为 2.18 CFU/mL，理想的 SE 检测浓度在 6.72 × 103 CFU/mL 和 6.72 × 108 CFU/mL 之间呈现良好的线性关系。所构建的光电化学传感器灵敏度高、线性范围宽，对潜在致病菌具有良好的选择性。因此，这项研究为 SE 的检测提供了一个非常有前景的光电化学平台。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.