Aluminium oxide/aluminium cobalt oxide as an efficient electrocatalyst for the electrochemical detection of 4-nitroaniline in environmental samples

IF 6.9 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2024-11-05 DOI:10.1016/j.psep.2024.11.002

Nandini Nataraj , Agalya Mahalingam , Xinke Liu , Yu-Chun Lu , Hsu-Wei Fang , Ren-Jei Chung

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引用次数: 0

Abstract

The rise of pollutants in our ecosystem has become a major threat to be resolved. 4-nitroaniline (4-NAE) is among the carcinogenic and toxic components present in the environment with harmful effects. Thus, we designed an electrochemical sensor to detect 4-NAE with the as-synthesized aluminium oxide/aluminium cobalt oxide (AO/ACO) via the hydrothermal preparation approach. Ensured with the physicochemical characterization of the sample (AO/ACO) with XRD, FTIR, Raman, and FESEM, the presence of AO/ACO was confirmed with no impurities. The electrochemical analysis of 4-NAE was analyzed after the optimization of the sample loading. The CV and DPV results signify that the developed sensor has excellent repeatability and reproducibility for 4-NAE detection with a low detection limit of 0.007 µM and a sensitivity of about 17.96 µAµM⁻¹cm⁻². The selectivity test studied with the presence of various interfering compounds showed satisfactory results with no interference other than 4-NAE. The environmental samples applied for the spiked 4-NAE showed good results proving the sensor's ability to detect 4-NAE in real samples. Thus, the sensor will be a reliable technique for the implementation in environmental applications for the detection of 4-NAE and even other compounds with modifications.

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氧化铝/氧化铝钴作为电化学检测环境样品中 4-硝基苯胺的高效电催化剂

生态系统中污染物的增加已成为一个亟待解决的重大威胁。4-硝基苯胺（4-NAE）是环境中存在的致癌和有毒成分之一，对人体有害。因此，我们设计了一种电化学传感器，通过水热法制备氧化铝/氧化铝钴（AO/ACO）来检测 4-NAE。通过 XRD、傅立叶变换红外光谱、拉曼光谱和 FESEM 对样品（AO/ACO）进行物理化学表征，确认了 AO/ACO 的存在，且无杂质。优化样品负载后，对 4-NAE 进行了电化学分析。CV 和 DPV 结果表明，所开发的传感器在检测 4-NAE 方面具有出色的重复性和再现性，检测限低至 0.007 µM，灵敏度约为 17.96 µAµM-1cm-2。在存在各种干扰化合物的情况下进行的选择性测试结果令人满意，除 4-NAE 外没有其他干扰。在环境样品中添加 4-NAE 的结果也很好，证明该传感器有能力检测真实样品中的 4-NAE。因此，该传感器将成为环境应用中检测 4-NAE 甚至其他改性化合物的可靠技术。

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

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.