Electroanalysis最新文献_第5页

Electrochemical Characterization and Xanthine Sensing Application Using Pseudomonas aeruginosa Nanowires 铜绿假单胞菌纳米线的电化学表征及黄嘌呤传感应用

IF 2.3 3区化学

Electroanalysis Pub Date : 2026-02-21 DOI: 10.1002/elan.70107

Padmapriya Subbiah, Anand Muthusamy

{"title":"Electrochemical Characterization and Xanthine Sensing Application Using Pseudomonas aeruginosa Nanowires","authors":"Padmapriya Subbiah, Anand Muthusamy","doi":"10.1002/elan.70107","DOIUrl":"10.1002/elan.70107","url":null,"abstract":"Xanthine (XAN), a key indicator of food spoilage and purine metabolism, is crucial for clinical diagnostics and food safety monitoring. In the present research, an enzyme-free electrochemical biosensor has been developed using bacterial nanowires (BNWs) from Pseudomonas aeruginosa assembled onto glassy carbon electrodes (GCE). Characterization using UV–Visible spectroscopy (UV–vis), scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR) confirmed that the nanowires possess a high surface area and contain redox-active components. Electrochemical studies, involving cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), differential pulse voltammetry (DPV), demonstrated that BNW-modified GCE enables sensitive or selective detection of XAN. Sensor exhibited linear detection range for XAN from 0.01 to 1 µM, with correlation coefficient (R2) of 0.9972 and sensitivity of 1.87 µA µM−1. Limit of detection (LOD) has been determined as 1.9 nM, and limit of quantification (LOQ) has been 6.2 nM. Biosensor demonstrated excellent selectivity, showing negligible interference from ascorbic acid (AA), histamine (HIS), uric acid (UA), L-histidine(L-HIS), with only minor cross-reactivity to hypoxanthine (HX). Fabrication reproducibility was high, with an relative standard deviation (RSD) below 2%, and stability has been maintained above 95% after repeated use. Real sample analysis in fish muscle extracts yielded recovery rates from 98.0% to 102.3%, confirming accuracy and minimal matrix effects. These results establish BNW-modified GCE as effective, reliable platform for trace-level XAN detection in complex samples.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"38 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147288476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Nonenzymatic Sensor Based on Cu2O Nanoparticles and Reduced Graphene Oxide for the Sensitive Determination of Glycine and Glucosamine 基于Cu2O纳米颗粒和还原氧化石墨烯的电化学非酶传感器用于甘氨酸和氨基葡萄糖的灵敏测定

IF 2.3 3区化学

Electroanalysis Pub Date : 2026-02-20 DOI: 10.1002/elan.70118

Anjana V N, Majo Joseph, Alex Joseph, Ebey P. Koshy, Beena Mathew

{"title":"Electrochemical Nonenzymatic Sensor Based on Cu2O Nanoparticles and Reduced Graphene Oxide for the Sensitive Determination of Glycine and Glucosamine","authors":"Anjana V N, Majo Joseph, Alex Joseph, Ebey P. Koshy, Beena Mathew","doi":"10.1002/elan.70118","DOIUrl":"10.1002/elan.70118","url":null,"abstract":"A nonenzymatic electrochemical sensor was developed for the sensitive detection of glucosamine and glycine using Cu2O nanoparticles and reduced graphene oxide–Cu2O (RGO–Cu2O) nanocomposites synthesized via a green Benedict's method, in which glucose acts as a reducing agent, enabling direct metal–oxide formation without high-temperature calcination. The morphology, structure, and composition of the materials were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, Raman spectroscopy, and UV–vis spectroscopy. The electrocatalytic sensing performance of Cu2O- and RGO–Cu2O-modified carbon paste electrodes were evaluated using cyclic voltammetry and differential pulse voltammetry. Owing to the synergistic interaction between conductive RGO and Cu+1 species, the RGO–Cu2O sensor exhibited significantly enhanced electrochemical responses. Under optimized conditions, a linear response for glycine was obtained in the range of 1–15 µM with a limit of detection (LOD) of 0.8 µM, while glucosamine showed an LOD of 0.4 µM with high selectivity. The practical applicability of the sensor was validated in artificial urine and artificial saliva, yielding satisfactory recoveries of 97%–101% for glycine and 94%–102% for glucosamine, with relative standard deviation values below 3.1%, demonstrating excellent accuracy, repeatability, and reliability for real-sample analysis.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"38 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147288252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Recent Progress in Anodic Nanocatalysts for Direct Methanol Fuel Cells: A Critical Review 直接甲醇燃料电池用阳极纳米催化剂的研究进展

IF 2.3 3区化学

Electroanalysis Pub Date : 2026-02-20 DOI: 10.1002/elan.70108

Muhaned Mohammed Eteya, Behjat Deiminiat

引用次数: 0

Recent Progress in Anodic Nanocatalysts for Direct Methanol Fuel Cells: A Critical Review 直接甲醇燃料电池用阳极纳米催化剂的研究进展

IF 2.3 3区化学

Electroanalysis Pub Date : 2026-02-20 DOI: 10.1002/elan.70108

Muhaned Mohammed Eteya, Behjat Deiminiat

引用次数: 0

Electrochemically Synthesized Polyaniline Nanofibers on Flexible Electrode for pH Sensing 柔性电极上电化学合成聚苯胺纳米纤维用于pH传感

IF 2.3 3区化学

Electroanalysis Pub Date : 2026-02-18 DOI: 10.1002/elan.70111

Jian Zhang, Mostafa Salehirozveh, Shadi Rahimi, Erik Gerner, Santosh Pandit, Ivan Mijakovic

{"title":"Electrochemically Synthesized Polyaniline Nanofibers on Flexible Electrode for pH Sensing","authors":"Jian Zhang, Mostafa Salehirozveh, Shadi Rahimi, Erik Gerner, Santosh Pandit, Ivan Mijakovic","doi":"10.1002/elan.70111","DOIUrl":"10.1002/elan.70111","url":null,"abstract":"pH monitoring is essential in diverse fields such as clinical diagnostics, environmental surveillance, food quality control, and industrial process management. Wound exudate pH serves as a noninvasive biomarker of wound status. Here, we report a flexible electrochemical pH sensor based on polyaniline nanofiber (PANI NF) modified polyimide electrodes prepared by electrochemical deposition. The nanofibrous PANI layer exhibits a porous interconnected architecture, as confirmed by scanning electron microscope (SEM), Fourier transform infrared (FTIR), Raman, and X-ray photoelectron spectroscopy (XPS) analyses. The PANI NF electrode displayed a near-Nernstian sensitivity of 57 mV pH−1 over the pH 5–9 range with excellent linearity (R2 > 0.99), low hysteresis (<4 mV), and high reproducibility (RSD 0.54%). Long-term drift studies revealed minimal potential drift (<1 mV h−1), and the calibration slope remained unchanged after 5 days of floating. The sensor accurately measured the pH of serum-containing simulated wound fluid (SWF), with deviations ≤ 0.06 from a commercial glass-electrode pH meter. After 90 days of storage at 4°C in the dark, the sensor retained its sensitivity with only minor variability (RSD 2.77%). These results demonstrate that the flexible PANI based sensor offers fast response, high sensitivity, and excellent stability, making it a promising platform for real-time, continuous monitoring of wound exudate pH and other biomedical or environmental applications.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"38 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/epdf/10.1002/elan.70111","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147299812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polyelectrolyte-Enhanced Electrochemical Sensing of Gaseous Hydrogen Peroxide With Copper(II)–Mediating Systems 用铜（II）介质系统增强聚电解质对气态过氧化氢的电化学传感

IF 2.3 3区化学

Electroanalysis Pub Date : 2026-02-17 DOI: 10.1002/elan.70113

Bartłomiej Barton, Nabi Ullah, Valentin Mirceski, Sylwia Smarzewska, Kamila Koszelska, Vasko Jovanovski, Dariusz Guziejewski

{"title":"Polyelectrolyte-Enhanced Electrochemical Sensing of Gaseous Hydrogen Peroxide With Copper(II)–Mediating Systems","authors":"Bartłomiej Barton, Nabi Ullah, Valentin Mirceski, Sylwia Smarzewska, Kamila Koszelska, Vasko Jovanovski, Dariusz Guziejewski","doi":"10.1002/elan.70113","DOIUrl":"10.1002/elan.70113","url":null,"abstract":"Hydrogen peroxide (H2O2) plays a crucial role in both biological and industrial applications; hence, there is a growing need to develop methods that enable reliable and efficient detection. While traditional techniques such as spectrophotometry and fluorescence provide high sensitivity, electrochemical methods offer rapid, cost-effective, and real-time monitoring capabilities. This study explores the role of polyelectrolytes as supporting electrolytes in enhancing electrochemical detection of hydrogen peroxide using copper(II)-mediated electrocatalysis. Building upon our previous research utilizing polyacrylic acid (PAA), alternative polyelectrolytes, including poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (pAMPS) and poly(acrylamide-co-acrylic acid) (pAAmAA), were investigated. Cyclic and square-wave voltammetry were employed to assess the impact of these polymers on the electrochemical performance. Results indicated that pAMPS strongly complexed Cu2+, reducing catalytic efficiency, whereas neutralized pAMPS improved Cu2+ availability, enhancing H2O2 reduction. Among all tested electrolytes, 1% pAAmAA demonstrated the highest sensitivity for direct H2O2 reduction and was subsequently selected for the gas-phase studies. Further optimization involved modifying pAMPS’ pH, revealing that pAMPS at pH 2 significantly enhanced overall catalytic activity. The combination of pAMPS and pAAmAA with Prussian blue-modified screen-printed electrodes enabled H2O2 gas-phase detection down to 1.8 × 10−10 mol L−1. These findings highlight the potential of polyelectrolyte-based electrolytes for improving the sensitivity and selectivity of electrochemical hydrogen peroxide detection, particularly in gas-phase applications.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"38 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 N-Doped Porous Carbon and ZrO2 Composite Derived From UiO-66-NH2 Improves the Performance of High-Nickel Cathodes in Lithium-Ion Batteries 由UiO-66-NH2制备的氮掺杂多孔碳和ZrO2复合材料提高了锂离子电池高镍阴极的性能

IF 2.3 3区化学

Electroanalysis Pub Date : 2026-02-17 DOI: 10.1002/elan.70104

Huili Zhao, Li Wang, Shuailong Li, Jiashuo Xie, Min Ji, Min Wang

{"title":"The N-Doped Porous Carbon and ZrO2 Composite Derived From UiO-66-NH2 Improves the Performance of High-Nickel Cathodes in Lithium-Ion Batteries","authors":"Huili Zhao, Li Wang, Shuailong Li, Jiashuo Xie, Min Ji, Min Wang","doi":"10.1002/elan.70104","DOIUrl":"10.1002/elan.70104","url":null,"abstract":"High-nickel cathodes attract increasing attention owing to their high specific capacity, yet exhibit structural instability and inferior cycling performance. Surface coating is an effective strategy to enhance their electrochemical behavior. This study introduces a nitrogen-doped zirconia-carbon composite (NC@ZrO2) as a coating for LiNi0.8Mn0.1Co0.1O2 (NCM811), with the composite prepared using the metal–organic framework material UiO-66-NH2 as a precursor. As a coating layer, NC@ZrO2 prevents direct contact between cathode and electrolyte to suppress side reactions and reduce interfacial resistance. Its porous structure facilitates lithium-ion diffusion. Consequently, the modified NCM811 presents remarkable rate capability and cycling stability. The 10 wt% coated NCM811 cathode demonstrates 78.3% capacity retention at 5 C, exceeding that of the unmodified NCM811 by 36.4%. After 500 cycles at 1 C, the modified material retains 82.4% capacity retention. This work presents a promising approach for optimizing high-nickel cathode materials using MOF-based composites.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"38 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Ion-Selective Electrode Robustness to Environmental Conditions Relevant to Spaceflight Missions to the Outer Solar System 离子选择电极对外太阳系航天任务相关环境条件的鲁棒性

IF 2.3 3区化学

Electroanalysis Pub Date : 2026-02-17 DOI: 10.1002/elan.70073

Elizabeth A. Jaramillo, Emmanuelle Despagnet-Ayoub, Anita Fisher, Richard C. Quinn, Aaron C. Noell

引用次数: 0

Dual-Mode Selective Detection of E. coli in Water via Benzoquinone-Redox-Mediated Electrochemical Immunosensing 苯醌-氧化还原介导的电化学免疫传感双模式选择性检测水中大肠杆菌

IF 2.3 3区化学

Electroanalysis Pub Date : 2026-02-17 DOI: 10.1002/elan.70112

Nursima Ucar, Hichem Moulahoum, Faezeh Ghorbanizamani, Didem Aksu, Simge Balaban-Hanoglu, Suna Timur

{"title":"Dual-Mode Selective Detection of E. coli in Water via Benzoquinone-Redox-Mediated Electrochemical Immunosensing","authors":"Nursima Ucar, Hichem Moulahoum, Faezeh Ghorbanizamani, Didem Aksu, Simge Balaban-Hanoglu, Suna Timur","doi":"10.1002/elan.70112","DOIUrl":"10.1002/elan.70112","url":null,"abstract":"Rapid and reliable detection of Escherichia coli (E. coli) in water is critical for safeguarding public health. We developed a dual-mode biosensor that integrates p-benzoquinone (BQ)-mediated colorimetric prescreening with antibody-based electrochemical quantification using screen-printed gold electrodes (SPGEs). BQ serves a dual role by generating a visible color change through its enzymatic reduction by viable E. coli and by participating in a reversible redox cycle that enhances faradaic response during electrochemical analysis. The biosensing platform was validated using E. coli ATCC 25922 together with broad-serotype polyclonal anti-E. coli O/K antibodies, which enable species-level recognition. Under optimized conditions (6.0 mM BQ, 25 µg/mL antibody), the sensor achieved a wide linear range from 101 to 109 CFU/mL with a detection limit of 0.57 CFU/mL. Repeatability was excellent (1.51% RSD), and specificity tests demonstrated clear discrimination between viable E. coli, nontarget bacteria (S. aureus), and nonviable cells. This dual-selectivity strategy, combining metabolic activity with molecular recognition, offers a rapid and portable approach for on-site microbial water quality monitoring.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"38 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Nanomaterial-Enhanced Electrochemical Strategies for Sensitive and Selective Detection of Curcumin 纳米材料增强电化学策略对姜黄素的敏感和选择性检测

IF 2.3 3区化学

Electroanalysis Pub Date : 2026-02-09 DOI: 10.1002/elan.70100

Zahra Jamalizadeh Bahaabadi, Sercan Karav, Prashant Kesharwani, Amirhossein Sahebkar

{"title":"Nanomaterial-Enhanced Electrochemical Strategies for Sensitive and Selective Detection of Curcumin","authors":"Zahra Jamalizadeh Bahaabadi, Sercan Karav, Prashant Kesharwani, Amirhossein Sahebkar","doi":"10.1002/elan.70100","DOIUrl":"10.1002/elan.70100","url":null,"abstract":"Curcumin, a bioactive polyphenolic compound derived from Curcuma longa, has attracted increasing attention due to its potent antioxidant, anticancer, and anti-inflammatory properties. Accurate quantification of curcumin in complex matrices such as food, biological fluids, and pharmaceuticals is crucial for quality control and therapeutic monitoring. Electrochemical sensing has recently emerged as a promising analytical approach owing to its simplicity, rapid response, and potential for on-site analysis. The incorporation of nanomaterials into electrode architectures has significantly improved sensor performance by enhancing electron transfer kinetics, catalytic activity, and surface area. This review summarizes the recent advances in electrochemical detection of curcumin with a focus on nanomaterial-based electrode modifications, including metal nanoparticles, carbon nanostructures, and conducting polymers. Comparative insights into sensor fabrication strategies, detection mechanisms, and analytical parameters are discussed. Furthermore, current challenges related to reproducibility, selectivity, and real-sample analysis are highlighted, along with future perspectives for the development of miniaturized and robust curcumin biosensors.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"38 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146216764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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