Publications by authors named "Irene Merino-Jimenez"

Sensing strategies adopting minimal electronic systems help in realizing REASSURED diagnostic tests. However, the challenge in developing such strategies escalates with demand in power and electronics during pursuit of reliable and accurate sensing. Herein, we present an electronic design strategy using a smart strip, operating with power generated from 3.

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  • * Microbial fuel cell (MFC) technology enables the conversion of waste into energy, making it a useful component in creating compact, eco-friendly toilet systems.
  • * The study introduces a system where low-cost ceramic MFCs can power electronic faucets, showing that a single MFC can operate an electronic faucet efficiently, paving the way for sustainable energy generation to improve public toilet hygiene and functionality.
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  • * This self-powered platform mimics a blood sample for early detection of HIV-1 using an ultra-sensitive electrolyte-gated field-effect transistor (EGOFET) and a paper-based biofuel cell (BFC) for energy.
  • * The device is designed for cost-effective, easy-to-use detection of HIV-1 p24 antigens at extremely low concentrations, making it possible to identify the transition from "healthy" to "infected" states without needing external power.
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Ceramic membranes for MFCs offer a low cost alternative to the expensive ion exchange membranes, whilst promoting catholyte accumulation. However, their physicochemical properties need to be optimised, in order to increase the power output and the catholyte quality from MFCs. Two compositions of fine fire clay (FFC) cured under three firing cycles were manufactured, analysed and tested as ion-exchange and structural material for MFCs.

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  • A microbial fuel cell (MFC) stack with 28 single cells was used to create an internal self-charged supercapacitor by utilizing carbon veil as the negative electrode and activated carbon with a Fe-based catalyst as the positive electrode.
  • The performance of the supercapacitive-MFC (SC-MFC) was tested at various solution conductivities, showing a decrease in equivalent series resistance (ESR) from 6.00 Ω to 3.42 Ω as conductivity increased from 2.5 to 40 mS/cm.
  • The SC-MFC achieved a maximum power of 36.9 mW and demonstrated robust performance over 4520 cycles (8 days) with consistent self-recharging capabilities.
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One of the challenges in Microbial Fuel Cell (MFC) technology is the improvement of the power output and the lowering of the cost required to scale up the system to reach usable energy levels for real life applications. This can be achieved by stacking multiple MFC units in modules and using cost effective ceramic as a membrane/chassis for the reactor architecture. The main aim of this work is to increase the power output efficiency of the ceramic based MFCs by compacting the design and exploring the ceramic support as the building block for small scale modular multi-unit systems.

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A novel design of microbial fuel cells (MFC) fuelled with undiluted urine was demonstrated to be an efficient power source for decentralised areas, but had only been tested under controlled laboratory conditions. Hence, a field-trial was carried out to assess its feasibility for practical implementation: a bespoke stack of 12 MFC modules was implemented as a self-sufficient lit urinal system at UK's largest music festival. Laboratory investigation showed that with a hydraulic retention time (HRT) of 44 h, a cascade of 4 modules (19.

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In this work, a microbial fuel cell (MFC) stack containing 28 ceramic MFCs was tested in both standard and supercapacitive modes. The MFCs consisted of carbon veil anodes wrapped around the ceramic separator and air-breathing cathodes based on activated carbon catalyst pressed on a stainless steel mesh. The anodes and cathodes were connected in parallel.

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The use of ceramics as low cost membrane materials for Microbial Fuel Cells (MFCs) has gained increasing interest, due to improved performance levels in terms of power and catholyte production. The catholyte production in ceramic MFCs can be attributed to a combination of water or hydrogen peroxide formation from the oxygen reduction reaction in the cathode, water diffusion and electroosmotic drag through the ion exchange membrane. This study aims to evaluate, for the first time, the effect of ceramic wall/membrane thickness, in terms of power, as well as catholyte production from MFCs using urine as a feedstock.

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Urine is an excellent fuel for electricity generation in Microbial Fuel Cells (MFCs), especially with practical implementations in mind. Moreover, urine has a high content in nutrients which can be easily recovered. Struvite (MgNHPO·6HO) crystals naturally precipitate in urine, but this reaction can be enhanced by the introduction of additional magnesium.

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