Electricity generation using a microbial 3D bio-anode embedded bio-photovoltaic cell in a microfluidic chamber†

IF 3.2 Q2 CHEMISTRY, PHYSICAL
Energy advances Pub Date : 2024-09-03 DOI:10.1039/D4YA00278D
Zülal Muganlı, İsmail Bütün, Ghazaleh Gharib and Ali Koşar
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Abstract

New-generation sustainable energy systems serve as major tools to mitigate the greenhouse gas emissions and effects of climate change. Biophotovoltaics (BPVs) presents an eco-friendly approach by employing solar energy to ensure self-sustainable bioelectricity. In contrast to other microbial fuel cells (MFCs), carbon feedstock is not essential for generating electricity with BPVs. However, the low power outputs (μW cm−2) obtained from the current systems limit their practical applications. In this study, a new generation polydimethylsiloxane (PDMS) based BPV cell unit was developed with a 3D hydrogel scaffold-based bio-anode to enable microbial biofilm formation for substantial electron capture and extracellular electron transfer. Moreover, the fabricated device was supported using an air-cathode electrode to elevate the gas exchange, thereby enabling optimum photosynthesis. Synechocystis sp. PCC 6803 seeded the 3D bio-anode embedded BPV cell, whose electrical characteristics were analyzed under the illumination of white light as day/night cycles with continuous feeding by the microchannel. For the first five days, the results indicated that the maximum power densities were 0.0534 W m−2 for dark hours and 0.03911 W m−2 for light hours without causing any effect on the cellular morphology of the cyanobacteria. As a result, the developed hydrogel scaffold-based bio-anode embedded BPV cell led to higher power densities via enabling a simple, self-sustainable, biocompatible, and eco-friendly energy harvesting platform with a possible capability in the applications of power lab-on-a-chip (LOC), point-of-care (POC), and small-scale portable electronic devices.

Abstract Image

Abstract Image

利用微流控室中的微生物三维生物阳极嵌入式生物光伏电池发电
新一代可持续能源系统是减缓温室气体排放和气候变化影响的主要工具。生物光电(BPV)是一种生态友好型方法,它利用太阳能确保生物电力的自我可持续性。与其他微生物燃料电池(MFCs)相比,生物光伏发电不需要碳原料。然而,现有系统的低功率输出(μW cm-2)限制了其实际应用。本研究开发了一种基于聚二甲基硅氧烷(PDMS)的新一代 BPV 单元,该单元采用三维水凝胶支架生物阳极,可形成微生物生物膜,从而实现大量电子捕获和细胞外电子传递。此外,还利用空气阴极电极支持所制造的装置,以提高气体交换,从而实现最佳光合作用。将 Synechocystis sp. PCC 6803 作为三维生物阳极嵌入式 BPV 细胞的种子,在白光的昼夜循环照射下,通过微通道持续进水,对其电学特性进行了分析。结果表明,在最初的五天中,暗时的最大功率密度为 0.0534 W m-2,亮时的最大功率密度为 0.03911 W m-2,但并未对蓝藻的细胞形态造成任何影响。因此,所开发的基于水凝胶支架的生物阳极嵌入式 BPV 电池可实现更高的功率密度,是一种简单、可自我维持、生物兼容和生态友好的能量收集平台,可应用于功率实验室芯片(LOC)、护理点(POC)和小型便携式电子设备。
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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CiteScore
1.80
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