Multi‐Array Tubular Microbial Fuel Cell‐Based Biosensor with Membrane Electrode Assembled Air‐Cathodes

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY

Fuel Cells Pub Date : 2024-06-26 DOI:10.1002/fuce.202400035

Ryan Yow Zhong Yeo, Wei Lun Ang, Mimi Hani Abu Bakar, Manal Ismail, Mohd Nur Ikhmal Salehmin, Eileen Hao Yu, Swee Su Lim

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引用次数: 0

Abstract

Using microbial fuel cells (MFCs) as biosensors ensures a sustainable method for water quality detection. However, the research on MFC‐based biosensors with a tubular setup is still scarce. In this study, a tubular multi‐array MFC‐based biosensor setup with air‐cathodes was assembled under the membrane electrode assembly configuration. Three different materials, including carbon black (CB), Pt/C (PtC), and polyaniline (PANI), were synthesized and coated on the membrane‐facing side of the air‐cathode to demonstrate the effects of modified air‐cathodes on the overall performance of the MFC‐biosensors. Unmodified carbon cloths were used as anodes. Three days of startup period were required by the biosensors before producing an electrical signal output. The highest current density was obtained by the polytetrafluoroethylene (PTFE)/CB/PtC (0.31 A m−2) sample followed by PTFE/CB/PANI (0.09 A m−2), and lastly PTFE/CB (0.05 A m−2). The control (PTFE only) sample did not generate any noticeable electrical signal. The electrochemical impedance spectroscopy analysis showed that the incorporation of PtC on the PTFE/CB sample lowered the charge transfer resistance (Rct), whereas the addition of PANI increased the Rct. Despite the differences in Rct values, both PTFE/CB/PtC and PTFE/CB/PANI samples demonstrated a better current density production than the PTFE/CB sample. Thus, modified air‐cathodes further elevated the biosensor's performance.

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基于多阵列管式微生物燃料电池的生物传感器与膜电极组装空气阴极

使用微生物燃料电池（MFC）作为生物传感器，是一种可持续的水质检测方法。然而，基于 MFC 的管式生物传感器的研究仍然很少。本研究在膜电极装配结构下组装了一个基于 MFC 的管状多阵列生物传感器装置，该装置带有空气阴极。研究人员合成了三种不同的材料，包括炭黑（CB）、Pt/C（PtC）和聚苯胺（PANI），并将其涂在空气阴极面向膜的一侧，以证明改性空气阴极对 MFC 生物传感器整体性能的影响。未经改性的碳布被用作阳极。生物传感器需要三天的启动期才能产生电信号输出。聚四氟乙烯 (PTFE)/CB/PtC 样品的电流密度最高（0.31 A m-2），其次是 PTFE/CB/PANI（0.09 A m-2），最后是 PTFE/CB（0.05 A m-2）。对照组（仅 PTFE）样品没有产生任何明显的电信号。电化学阻抗光谱分析显示，在 PTFE/CB 样品中加入 PtC 会降低电荷转移电阻（Rct），而加入 PANI 则会增加 Rct。尽管 Rct 值不同，但 PTFE/CB/PtC 和 PTFE/CB/PANI 样品都比 PTFE/CB 样品产生了更好的电流密度。因此，改性空气阴极进一步提高了生物传感器的性能。

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

Fuel Cells 工程技术-电化学

CiteScore

5.80

自引率

3.60%

发文量

审稿时长

3.7 months

期刊介绍： This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.