Bioelectrochemistry最新文献

Hybrid conducting polymer films promote neural outgrowth and neural-electrode integration in vitro

IF 4.8 2区化学

Bioelectrochemistry Pub Date : 2025-04-15 DOI: 10.1016/j.bioelechem.2025.108985

Sara Shakibania , Taral Patel , Roman Turczyn , Manus J.P. Biggs , Katarzyna Krukiewicz

{"title":"Hybrid conducting polymer films promote neural outgrowth and neural-electrode integration in vitro","authors":"Sara Shakibania , Taral Patel , Roman Turczyn , Manus J.P. Biggs , Katarzyna Krukiewicz","doi":"10.1016/j.bioelechem.2025.108985","DOIUrl":"10.1016/j.bioelechem.2025.108985","url":null,"abstract":"<div><div>The increase incidence of neurological disorders arising from an aging population has accelerated research into electrical medicine approaches as promising pretreatments options. Achieving chronic therapeutic electrical stimulation is dependent on an optimal charge delivery capacity of a stimulating device. In particular, instability at the electrode-tissue interface is frequently derived from a physicomechanical mismatch in the mechanical properties of the rigid, smooth surface of metallic electrodes and the soft nature of neural tissues, leading to perielectrode scarring, a subsequent reduction in charge transfer capability and decreased stimulation efficacy. This study explores the modification of neural electrodes using electroactive materials to enhance their performance. Specifically, applying sequentially two different conducting polymers, namely polyaniline and poly(3,4-ethylenedioxythiophene), which induced a significant increase in the active surface area of an electrode, moderate hydrophilicity (49 ± 7<sup>o</sup>), capacitance (19.9 mC/cm<sup>2</sup>), low impedance (165 ± 6 Ω at 1 kHz), and a fibrillar morphology. Cell culture studies with rat-derived embryonic ventral mesencephalon cells revealed that hybrid conducting polymer coatings supported neural outgrowth and cell adhesion in vitro.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"165 ","pages":"Article 108985"},"PeriodicalIF":4.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a model to describe the performance of electromethanosynthesis in two microbial electrolysis cells with different biocathode sizes 建立一个模型来描述具有不同生物阴极尺寸的两种微生物电解池的电甲醇合成性能

IF 4.8 2区化学

Bioelectrochemistry Pub Date : 2025-04-12 DOI: 10.1016/j.bioelechem.2025.108988

Gerasimos Kanellos , Theofilos Kamperidis , Anastasia Pilichou , Asimina Tremouli , Gerasimos Lyberatos

{"title":"Development of a model to describe the performance of electromethanosynthesis in two microbial electrolysis cells with different biocathode sizes","authors":"Gerasimos Kanellos , Theofilos Kamperidis , Anastasia Pilichou , Asimina Tremouli , Gerasimos Lyberatos","doi":"10.1016/j.bioelechem.2025.108988","DOIUrl":"10.1016/j.bioelechem.2025.108988","url":null,"abstract":"<div><div>Electromethanosynthesis in a Microbial Electrolysis Cell facilitates CH<sub>4</sub> production through enhanced reaction kinetics and efficient CO<sub>2</sub>/CH<sub>4</sub> separation, while concurrently facilitating wastewater treatment. Two MECs which differed in the biocathode projected surface area (1.25 and 0.25 m<sup>2</sup>) were constructed and operated. The results demonstrated that increasing the electrode size led to increased CH<sub>4</sub> production and improved MEC efficiency. A mathematical model was developed to describe the two MECs in the COMSOL Multiphysics framework, which simulates the growth of six microbial populations, using Butler-Volmer-Monod kinetics, taking into account the impact of the overpotentials. The model captured the effect of the developed overpotentials on substrate consumption and current production and the simulations showed good agreement with the measured variables in terms of reaction rates, leading to a deviation of 2.5 % for organic content removal and < 1 % for electromethanosynthesis. The validation of the model, accounting for varying biocathode sizes, accurately predicted the CH<sub>4</sub> production under all different conditions employed and the highest deviation was 10 %. The developed model provides the foundation for understanding the dynamics of substrate availability, diffusion of species, electrochemical reactions and microbial populations, across multiple chemical pathways, while establishing the framework for predicting the significance of reactor design for efficient electromethanosynthesis.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"165 ","pages":"Article 108988"},"PeriodicalIF":4.8,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An efficient ECL aptasensor based on resonance energy transfer between NCDs@Ag3PO4 and Cu-doped Cu: Eu MOF for the detection of diethylstilbestrol 基于NCDs@Ag3PO4和掺杂铜的Cu.Eu MOF之间共振能量转移的高效ECL诱导传感器，用于检测己烯雌酚：Eu MOF 的共振能量转移，用于检测己烯雌酚

IF 4.8 2区化学

Bioelectrochemistry Pub Date : 2025-04-08 DOI: 10.1016/j.bioelechem.2025.108987

Longmei Yao , Jiajia Zhi , Wenchang Wang , Qingyi Li , Ding Jiang , Xiaohui Chen , Zhidong Chen

{"title":"An efficient ECL aptasensor based on resonance energy transfer between NCDs@Ag3PO4 and Cu-doped Cu: Eu MOF for the detection of diethylstilbestrol","authors":"Longmei Yao , Jiajia Zhi , Wenchang Wang , Qingyi Li , Ding Jiang , Xiaohui Chen , Zhidong Chen","doi":"10.1016/j.bioelechem.2025.108987","DOIUrl":"10.1016/j.bioelechem.2025.108987","url":null,"abstract":"<div><div>As a synthetic estrogen, diethylstilbestrol (DES) residues in water pose a threat to human health. In this work, a novel electrochemiluminescence resonance energy transfer (ECL-RET) aptamer sensor based on NCDs@Ag<sub>3</sub>PO<sub>4</sub> as a resonance energy transfer donor and Cu<sup>2+</sup> doped Eu MOF (Cu: Eu MOF) as an efficient resonance energy transfer acceptor for the detection of diethylstilbestrol (DES) was proposed for the first time. The aptamer sensor uses Ag<sub>3</sub>PO<sub>4</sub> nanoparticles loaded with nitrogen-doped carbon quantum dots (NCDs) as the ECL emitter, which improves the electron transfer efficiency of the sensor and promotes the generation of SO<sub>4</sub><sup>·-</sup> radicals, thereby improving the luminescence intensity and stability of the ECL sensor. The energy acceptor Cu: Eu MOF binds to the apt on NCDs@Ag<sub>3</sub>PO<sub>4</sub> by complementary base pairing through complementary DNA (cDNA). When DES is present in the sample, DES competes with the energy acceptor. The stronger interaction between DES and apt leads to the shedding of Cu: Eu MOF-cDNA from the electrode and the recovery of ECL signal. Based on this, under optimal conditions, the linear range of the sensor for detecting DES is 1.0 × 10<sup>−13</sup>–1.0 × 10<sup>−6</sup> M, and the detection limit is 7.4 × 10<sup>−14</sup> M (S/N = 3). The developed aptasensor showed excellent recognition ability for residual DES in actual water samples. The sensor has superior measurement ability and potential application value in the field of environmental water quality monitoring.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"165 ","pages":"Article 108987"},"PeriodicalIF":4.8,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneous degradation of direct black BN dye wastewater and electricity generation by red soil microbial fuel cells

IF 4.8 2区化学

Bioelectrochemistry Pub Date : 2025-04-08 DOI: 10.1016/j.bioelechem.2025.108986

Yian Wang , Zhijun Cao , Xinyue Fu , Tianfa Huang , Weiping Zhang , Genhe He

{"title":"Simultaneous degradation of direct black BN dye wastewater and electricity generation by red soil microbial fuel cells","authors":"Yian Wang , Zhijun Cao , Xinyue Fu , Tianfa Huang , Weiping Zhang , Genhe He","doi":"10.1016/j.bioelechem.2025.108986","DOIUrl":"10.1016/j.bioelechem.2025.108986","url":null,"abstract":"<div><div>Azo dyes, widely used in industries, pose environmental challenges due to their recalcitrance and potential carcinogenicity. Microbial fuel cells (MFCs) offer a sustainable solution by coupling wastewater treatment with renewable energy production. However, research on polyazo dye treatment using MFCs remains limited. This study developed a novel MFC system using red soil as the anode substrate (RSMFC) to treat direct black BN wastewater, focusing on removal efficiency, power generation, and microbial community dynamics. The concentration of direct black BN influenced the RSMFC's performance, showing a “low promotion and high inhibition” effect on electricity generation. The system achieved a peak power density of 584.82 mW/m<sup>3</sup>. GC–MS analysis identified primary degradation products, including 13-Docosenamide, (<em>Z</em>)- and Bis(2-ethylhexyl) phthalate, revealing the degradation pathway of direct black BN. Microbial community analysis highlighted the roles of <em>Bosea</em>, <em>Citrifermentans</em>, <em>Desulfosporosinus</em>, and <em>Pseudomonas</em> in dye tolerance and degradation. Additionally, influent concentrations of 300 mgCOD/L, containing 99.7 mg/L direct black BN, significantly enriched electricigens such as <em>Geobacter</em>, <em>Desulfovibrio</em>, <em>Pseudomonas</em>, and <em>Acinetobacter</em>. Our findings provide essential groundwork for optimizing RSMFCs and advancing azo dye wastewater treatment technologies. The simultaneous removal of direct black BN and electricity generation in the RSMFC holds promise for sustainable environmental management.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"165 ","pages":"Article 108986"},"PeriodicalIF":4.8,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The acceleration of localized copper corrosion by extracellular polymeric substances of sulfate-reducing bacteria

IF 4.8 2区化学

Bioelectrochemistry Pub Date : 2025-04-05 DOI: 10.1016/j.bioelechem.2025.108980

Huixuan Qian, Tianguan Wang, Bo Zhang, Guozhe Meng

{"title":"The acceleration of localized copper corrosion by extracellular polymeric substances of sulfate-reducing bacteria","authors":"Huixuan Qian, Tianguan Wang, Bo Zhang, Guozhe Meng","doi":"10.1016/j.bioelechem.2025.108980","DOIUrl":"10.1016/j.bioelechem.2025.108980","url":null,"abstract":"<div><div>Microbial-induced corrosion (MIC) of copper pipelines, especially in sulfate-reducing bacteria (SRB)-rich environments, poses a significant challenge. Despite its importance, the role of SRB-secreted extracellular polymeric substances (EPS) in copper corrosion particularly their time-dependent interactions remains unclear. This knowledge gap limits the development of effective corrosion mitigation strategies. In this study, we investigate the impact of EPS on copper corrosion using electrochemical and surface characterization techniques. Our findings reveal that EPS exhibits a dual role in copper corrosion. During the initial immersion phase (1–3 days), EPS adsorption forms a protective layer, temporarily inhibiting corrosion. In the middle stage (4–8 days), EPS accelerates corrosion by degrading the copper oxide film, as evidenced by a negative shift in the breakdown potential (<em>E</em><sub>b</sub>). In the final stage (9–14 days), uneven EPS coverage exacerbates localized corrosion. Thus, SRB-secreted EPS initially acts as a corrosion inhibitor but later promotes localized corrosion through oxide film disruption and non-uniform coverage. We systematically investigated the mechanisms of EPS-mediated corrosion inhibition across different immersion periods, identifying the critical transition threshold between the inhibition and promotion phases.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"165 ","pages":"Article 108980"},"PeriodicalIF":4.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143790972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A colorimetric and electrochemical dual-modal ochratoxin a aptasensor based on branched hybridization chain reaction signal amplification

IF 4.8 2区化学

Bioelectrochemistry Pub Date : 2025-04-05 DOI: 10.1016/j.bioelechem.2025.108984

Yihao Li , Yulu Cao , Junjie Huang , Jiachen Zhang , Yonghong Wang , Yuanqing Wang , Ge Ning

{"title":"A colorimetric and electrochemical dual-modal ochratoxin a aptasensor based on branched hybridization chain reaction signal amplification","authors":"Yihao Li , Yulu Cao , Junjie Huang , Jiachen Zhang , Yonghong Wang , Yuanqing Wang , Ge Ning","doi":"10.1016/j.bioelechem.2025.108984","DOIUrl":"10.1016/j.bioelechem.2025.108984","url":null,"abstract":"<div><div>Ochratoxin A (OTA), a fungal toxin, induces various toxic effects in animals and humans through the enrichment of toxin residues. In this work, a dual-modal biosensor based on gold nanoparticles (AuNPs) and branched hybridization chain reaction (bHCR) was proposed for the detection of OTA. The strategy is contingent on OTA aptamer-bridged occurrence of bHCR and the salt-induced aggregation of AuNPs. OTA-apt/cDNA could be used to specifically identify the OTA and trigger bHCR reactions, producing a long-branched dsDNA polymer. The electroactive molecule-methylene blue (MB) can be inserted into the superstructure of branched DNA due to the formation of DNA polymers, leading to dynamic changes in MB redox signaling. The residual DNA hairpins were added and adhered to the surface of AuNPs, but they were inadequate to prevent the AuNPs from salt-induced aggregation. The dual-modal yields limits of detection of 4.8 pM (electrochemical assay) and 0.25 nM (colorimetric assay), respectively. It exhibited excellent specificity against common mycotoxins (AFB1, DON, FB1, ZEN), with satisfactory recoveries in corn flour (92.9–108.3 %). This aptasensor, which adopts a dual-modal strategy, features self-calibration to reduce false-positive results and improve accuracy. It demonstrates significant advantages in mycotoxin detection.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"165 ","pages":"Article 108984"},"PeriodicalIF":4.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143790924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical quantification of β-glucosidase activity for inhibitor screening applications

IF 4.8 2区化学

Bioelectrochemistry Pub Date : 2025-04-04 DOI: 10.1016/j.bioelechem.2025.108981

Catalina Farcas , C. Reyes Mateo , Francisco Montilla

{"title":"Electrochemical quantification of β-glucosidase activity for inhibitor screening applications","authors":"Catalina Farcas , C. Reyes Mateo , Francisco Montilla","doi":"10.1016/j.bioelechem.2025.108981","DOIUrl":"10.1016/j.bioelechem.2025.108981","url":null,"abstract":"<div><div>The measurement of enzymatic activity of glucosidases is essential for its use in various clinical and industrial applications. Inhibitors of these enzymes are promising candidates as antidiabetic drug. This study presents the development of an electrochemical device for quantifying <em>β</em>-glucosidase activity using an electrochemical transduction method. Enzyme activity was evaluated in a citrate buffer solution with <em>p</em>-arbutin (hydroquinone-β-D-glucopyranoside) as the substrate, employed for the first time in this context. The enzymatic hydrolysis of the glycosidic bond produced hydroquinone, which was quantified via voltammetric measurements to determine the hydrolysis rate. To develop a device for the screening of inhibitory effects on glucosidase, this enzyme was immobilized into silica matrix and its activity was evaluated. Entrapped enzyme shows partial retention of its catalytic function that can be measured by means of the electrochemical transduction. The inhibitory effects of various sugars and acarbose (a commonly used antidiabetic drug) were investigated using the sensor with the immobilized enzyme. Inhibition rates detected ranged from 87 % to 13 % for the sugars and 17 % for acarbose.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"165 ","pages":"Article 108981"},"PeriodicalIF":4.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143790973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical immunosensor for detecting fetal red blood cells with potential diagnosis of fetomaternal hemorrhage

IF 4.8 2区化学

Bioelectrochemistry Pub Date : 2025-04-03 DOI: 10.1016/j.bioelechem.2025.108983

Suelen Assunpção Nishio , Andrei Moroz , Marjorie de Assis Golim , Aline Marcia Marques Braz , Anna Laura Yuri Yokomichi , Valber A. Pedrosa , Ivana Cesarino , Osvaldo N. Oliveira Jr. , Sidney J.L. Ribeiro , Elenice Deffune , Marli Leite de Moraes

{"title":"Electrical immunosensor for detecting fetal red blood cells with potential diagnosis of fetomaternal hemorrhage","authors":"Suelen Assunpção Nishio , Andrei Moroz , Marjorie de Assis Golim , Aline Marcia Marques Braz , Anna Laura Yuri Yokomichi , Valber A. Pedrosa , Ivana Cesarino , Osvaldo N. Oliveira Jr. , Sidney J.L. Ribeiro , Elenice Deffune , Marli Leite de Moraes","doi":"10.1016/j.bioelechem.2025.108983","DOIUrl":"10.1016/j.bioelechem.2025.108983","url":null,"abstract":"<div><div>Fetomaternal hemorrhage, characterized by the passage of fetal blood into maternal circulation, poses significant risks to both mother and fetus. As it may be diagnosed by quantifying fetal red blood cells in maternal circulation, we developed an immunosensor to detect fetal cells made with a layer-by-layer silk fibroin film and a commercial CD71 monoclonal antibody. Detection was achieved through electrical impedance spectroscopy, allowing discrimination between human umbilical cord blood (UCB) cells and adult peripheral blood (APB) cells from patients and volunteers. Positive samples (UCB) exhibited an average capacitance of 0.34 nF at 1 to 10 Hz, while negative samples (APB) had 0.05 nF. Full agreement was obtained with the detection of fetal red blood cells using flow cytometry. The change in the electrical response was associated with the adsorption of UCB cells on the immunosensor, primarily due to conformational changes in the amide I groups. This reflects the immunoaffinity interactions, as revealed with polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS). Cell adsorption was confirmed with optical microscopy images, which indicate possible point-of-care strategies to diagnose FMH with image analysis.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"165 ","pages":"Article 108983"},"PeriodicalIF":4.8,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Riboflavin-mediated extracellular electron transfer enhances microbiologically influenced corrosion of 316L stainless steel by Enterococcus faecalis

IF 4.8 2区化学

Bioelectrochemistry Pub Date : 2025-04-01 DOI: 10.1016/j.bioelechem.2025.108982

Xiaomeng Liu , Enze Zhou , Yongqiang Fan , Fuhui Wang , Dake Xu

{"title":"Riboflavin-mediated extracellular electron transfer enhances microbiologically influenced corrosion of 316L stainless steel by Enterococcus faecalis","authors":"Xiaomeng Liu , Enze Zhou , Yongqiang Fan , Fuhui Wang , Dake Xu","doi":"10.1016/j.bioelechem.2025.108982","DOIUrl":"10.1016/j.bioelechem.2025.108982","url":null,"abstract":"<div><div>316L stainless steel (SS) is widely used in medical implants due to its excellent mechanical properties. However, the increasing use of metallic implants has made microbiologically influenced corrosion (MIC) a significant safety concern, as it can release harmful metal ions in the body. Despite this risk, research on MIC behavior and mechanisms of 316L SS in the intestinal environment is limited. This study provides novel evidence that <em>Enterococcus faecalis</em>, an intestinal electroactive microorganism, contributes to MIC of 316L SS. MIC occurrence by <em>E. faecalis</em> was confirmed in nutrient-rich media and simulated intestinal fluid, with increased MIC rates under carbon starvation, suggesting an extracellular electron transfer (EET) mechanism. Electrochemical tests and material analyses supported a riboflavin-mediated EET mechanism, indicating that <em>E. faecalis</em> biofilms deteriorate the protective oxide layer on 316L SS through EET, with riboflavin accelerating corrosion. These findings identify EET as the primary mechanism by which <em>E. faecalis</em> enhances MIC in the gut, providing insights into intestinal corrosion risks and guiding the development of corrosion-resistant biomaterials.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"165 ","pages":"Article 108982"},"PeriodicalIF":4.8,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced photocurrent generation of a bio-photocathode based on photosystem I integrated in solvated redox polymers films nanostructured by SWCNTs

IF 4.8 2区化学

Bioelectrochemistry Pub Date : 2025-03-28 DOI: 10.1016/j.bioelechem.2025.108979

Yanling Yu , Xiaodong Su , Tong Xing , Xuelin Zhao , Zhou Zhang , Wanqing Zhang , Xinping Wang , Weining Zhao , Mei Li , Fangyuan Zhao

{"title":"Enhanced photocurrent generation of a bio-photocathode based on photosystem I integrated in solvated redox polymers films nanostructured by SWCNTs","authors":"Yanling Yu , Xiaodong Su , Tong Xing , Xuelin Zhao , Zhou Zhang , Wanqing Zhang , Xinping Wang , Weining Zhao , Mei Li , Fangyuan Zhao","doi":"10.1016/j.bioelechem.2025.108979","DOIUrl":"10.1016/j.bioelechem.2025.108979","url":null,"abstract":"<div><div>The most energetic light-induced charge-separation step in nature is driven by photosystem I (PSI), making this photosynthetic protein an attractive candidate for the development of semi-artificial energy conversion devices. Despite significant progress in semiconductor-free bio-photocathodes, the highest photocurrent density was only 322 ± 19 μA cm<sup>−2</sup>, achieved by integrating PSI within a pH-dependent poly(vinyl)imidazole Os(bispyridine)<sub>2</sub>Cl redox polymer (T Kothe et al., <em>Chem. Eur. J.</em>, 2014, 20, 11029). This study presents a more efficient PSI-based bio-photocathode by incorporating single-walled carbon nanotubes (SWCNTs) into the redox hydrogel composed of the same Osmium-containing redox polymer. The nanostructured redox hydrogel film with SWCNTs serving as electric scaffolds significantly improves the stability, loading amount, and heterogeneous electron transfer rate, resulting in a substantial increase in photocurrent density exceeding 2 mA cm<sup>−2</sup>, the highest achieved in a semiconductor-free PSI based photocathode to date. Bioelectrodes constructed by pre-depositing SWCNTs on the electrode surface via covalent bonds outperform those formed by co-immobilizing SWCNTs with the redox hydrogel. The dependence of photocurrent on light intensity and the photocurrent spectrum action demonstrate that the photocurrent unequivocally arises from PSI charge separation. This research lays a promising foundation for the development of semi-artificial photoelectrochemical devices for light-to-energy conversion.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"165 ","pages":"Article 108979"},"PeriodicalIF":4.8,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0