Electroanalysis最新文献_第7页

Selective Electrochemical Sensing of Sunset Yellow in Beverages Based on Synergistic Signal Amplification of HKUST1 and MWCNTs 基于HKUST1和MWCNTs协同信号放大的饮料中日落黄选择性电化学传感

IF 2.7 3区化学

Electroanalysis Pub Date : 2025-02-07 DOI: 10.1002/elan.12020

Khethiwe Mthiyane, Gloria Ebube Uwaya, Krishna Bisetty

{"title":"Selective Electrochemical Sensing of Sunset Yellow in Beverages Based on Synergistic Signal Amplification of HKUST1 and MWCNTs","authors":"Khethiwe Mthiyane, Gloria Ebube Uwaya, Krishna Bisetty","doi":"10.1002/elan.12020","DOIUrl":"https://doi.org/10.1002/elan.12020","url":null,"abstract":"In this study, a highly selective electrooxidation method for sunset yellow (SY) detection in real food samples is presented on the basis of the integration of HKUST1 with multiwalled carbon nanotubes (MWCNTs) doped on a glassy carbon electrode (GCE). Cyclic voltammetry measurements of the HKUST-1-MWCNT-composite electrode revealed enhanced sensitivity for SY with a distinct redox peak potential of approximately 0.6 V, which was attributed to the highly active surface of the electrode. This response was notably more pronounced than those of tartrazine, allura red and amaranth. Electrochemical impedance spectroscopy analysis revealed a low charge transfer resistance (Rct) for the GCE-HKUST-1-MWCNT electrode, indicating that the integration of HKUST−1 and MWCNTs significantly enhanced the electrical conductivity. In addition, Monte Carlo simulations revealed that a single copper paddle wheel (the secondary building unit of HKUST−1) greatly enhanced the dispersion of the MWCNTs within the matrix. Notably, revealing that the preferred adsorption site of SY was within the inner surface of the MWCNTs, leading to signal amplification. Overall, the sensor achieved limits of detection and limits of quantification of 1.03 and 3.44 μM, respectively, within a defined linear dynamic range. Furthermore, the sensor demonstrated strong practical applicability in real sample analysis, with an excellent recovery rate ranging from 83.11 to 114%. This sensing technique shows great promise for the selective monitoring and detection of synthetic colourants in the food sector.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.12020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362708","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

Selective Electrochemical Sensing of Sunset Yellow in Beverages Based on Synergistic Signal Amplification of HKUST1 and MWCNTs 基于HKUST1和MWCNTs协同信号放大的饮料中日落黄选择性电化学传感

IF 2.7 3区化学

Electroanalysis Pub Date : 2025-02-07 DOI: 10.1002/elan.12020

Khethiwe Mthiyane, Gloria Ebube Uwaya, Krishna Bisetty

{"title":"Selective Electrochemical Sensing of Sunset Yellow in Beverages Based on Synergistic Signal Amplification of HKUST1 and MWCNTs","authors":"Khethiwe Mthiyane, Gloria Ebube Uwaya, Krishna Bisetty","doi":"10.1002/elan.12020","DOIUrl":"https://doi.org/10.1002/elan.12020","url":null,"abstract":"In this study, a highly selective electrooxidation method for sunset yellow (SY) detection in real food samples is presented on the basis of the integration of HKUST1 with multiwalled carbon nanotubes (MWCNTs) doped on a glassy carbon electrode (GCE). Cyclic voltammetry measurements of the HKUST-1-MWCNT-composite electrode revealed enhanced sensitivity for SY with a distinct redox peak potential of approximately 0.6 V, which was attributed to the highly active surface of the electrode. This response was notably more pronounced than those of tartrazine, allura red and amaranth. Electrochemical impedance spectroscopy analysis revealed a low charge transfer resistance (Rct) for the GCE-HKUST-1-MWCNT electrode, indicating that the integration of HKUST−1 and MWCNTs significantly enhanced the electrical conductivity. In addition, Monte Carlo simulations revealed that a single copper paddle wheel (the secondary building unit of HKUST−1) greatly enhanced the dispersion of the MWCNTs within the matrix. Notably, revealing that the preferred adsorption site of SY was within the inner surface of the MWCNTs, leading to signal amplification. Overall, the sensor achieved limits of detection and limits of quantification of 1.03 and 3.44 μM, respectively, within a defined linear dynamic range. Furthermore, the sensor demonstrated strong practical applicability in real sample analysis, with an excellent recovery rate ranging from 83.11 to 114%. This sensing technique shows great promise for the selective monitoring and detection of synthetic colourants in the food sector.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.12020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362836","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

Additive Manufacturing Electrochemistry: Development of Bismuth Oxide Microparticle Filament for Lead (II) Detection 增材制造电化学：用于铅（II）检测的氧化铋微粒灯丝的开发

IF 2.7 3区化学

Electroanalysis Pub Date : 2025-02-07 DOI: 10.1002/elan.12019

Enyioma C. Okpara, Robert D. Crapnell, Elena Bernalte, Olanrewaju B. Wojuola, Craig E. Banks

{"title":"Additive Manufacturing Electrochemistry: Development of Bismuth Oxide Microparticle Filament for Lead (II) Detection","authors":"Enyioma C. Okpara, Robert D. Crapnell, Elena Bernalte, Olanrewaju B. Wojuola, Craig E. Banks","doi":"10.1002/elan.12019","DOIUrl":"https://doi.org/10.1002/elan.12019","url":null,"abstract":"Accurate, rapid, and cost-effective validation of water quality is essential to ensure that the World Health Organization's (WHO) standards are met and that the United Nations Sustainable Development Goal 6—Clean Water and Sanitation is achieved. To this end, the development of additive-manufactured electrodes using recycled polylactic acid, nanocarbon black, and micro-sized bismuth oxide is reported. These electrodes, that are fabricated using a thermal mixing approach, can be customized to incorporate varying amounts of bismuth oxide (1, 2.5, and 5 wt%) maintaining the integrity of the base polymer. The electrodes developed in this work demonstrate significant potential for the electrochemical detection of lead (II) within water, achieving limits of detection of 0.79, 0.93, and 4.29 μg L−1 (3σ), for the 1, 2.5, and 5 wt% bismuth oxide sensors, respectively. These detection limits are notably below the WHO recommended threshold of 10 μg L−1 for lead in domestic water and even achieve the 2036 European Union targets of 5 μg L−1. The 2.5 wt% bismuth oxide electrodes exhibit excellent reproducibility and specificity, achieving average recovery rates of 98.28% and 100.15% in the analysis of spiked lead (II) samples in deionized and condensed atmospheric water, respectively. This approach is further validated against inductively coupled plasma mass spectroscopy measurements.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.12019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362837","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

Additive Manufacturing Electrochemistry: Development of Bismuth Oxide Microparticle Filament for Lead (II) Detection 增材制造电化学：用于铅（II）检测的氧化铋微粒灯丝的开发

IF 2.7 3区化学

Electroanalysis Pub Date : 2025-02-07 DOI: 10.1002/elan.12019

Enyioma C. Okpara, Robert D. Crapnell, Elena Bernalte, Olanrewaju B. Wojuola, Craig E. Banks

{"title":"Additive Manufacturing Electrochemistry: Development of Bismuth Oxide Microparticle Filament for Lead (II) Detection","authors":"Enyioma C. Okpara, Robert D. Crapnell, Elena Bernalte, Olanrewaju B. Wojuola, Craig E. Banks","doi":"10.1002/elan.12019","DOIUrl":"https://doi.org/10.1002/elan.12019","url":null,"abstract":"Accurate, rapid, and cost-effective validation of water quality is essential to ensure that the World Health Organization's (WHO) standards are met and that the United Nations Sustainable Development Goal 6—Clean Water and Sanitation is achieved. To this end, the development of additive-manufactured electrodes using recycled polylactic acid, nanocarbon black, and micro-sized bismuth oxide is reported. These electrodes, that are fabricated using a thermal mixing approach, can be customized to incorporate varying amounts of bismuth oxide (1, 2.5, and 5 wt%) maintaining the integrity of the base polymer. The electrodes developed in this work demonstrate significant potential for the electrochemical detection of lead (II) within water, achieving limits of detection of 0.79, 0.93, and 4.29 μg L−1 (3σ), for the 1, 2.5, and 5 wt% bismuth oxide sensors, respectively. These detection limits are notably below the WHO recommended threshold of 10 μg L−1 for lead in domestic water and even achieve the 2036 European Union targets of 5 μg L−1. The 2.5 wt% bismuth oxide electrodes exhibit excellent reproducibility and specificity, achieving average recovery rates of 98.28% and 100.15% in the analysis of spiked lead (II) samples in deionized and condensed atmospheric water, respectively. This approach is further validated against inductively coupled plasma mass spectroscopy measurements.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.12019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362711","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

A Novel Electrochemical Platform Based on Cadmium (II) (fluorophenyl)Porphyrin and Gold Nanoparticles Modified Screen-Printed Electrode Electrode for the Sensitive Detection of Bisphenol A 基于镉（II）（氟苯基）卟啉和金纳米颗粒修饰的丝网印刷电极的新型电化学平台用于双酚A的灵敏检测

IF 2.7 3区化学

Electroanalysis Pub Date : 2025-02-07 DOI: 10.1002/elan.12017

Fatma Rejab, Nour Elhouda Dardouri, Ahlem Rouis, Mosaab Echabaane, Habib Nasri, Hamdi Ben Halima, Nicole Jaffrezic-Renault

{"title":"A Novel Electrochemical Platform Based on Cadmium (II) (fluorophenyl)Porphyrin and Gold Nanoparticles Modified Screen-Printed Electrode Electrode for the Sensitive Detection of Bisphenol A","authors":"Fatma Rejab, Nour Elhouda Dardouri, Ahlem Rouis, Mosaab Echabaane, Habib Nasri, Hamdi Ben Halima, Nicole Jaffrezic-Renault","doi":"10.1002/elan.12017","DOIUrl":"https://doi.org/10.1002/elan.12017","url":null,"abstract":"Bisphenol A (BPA) is categorized as an endocrine-disrupting substance; it is a risky substance to both environmental and human health, necessitating monitoring. In this present study, a novel electrochemical sensing platform based on Cd metalloporphyrin ([(5,10,15,20- tetrakis(p-flurophenyl) porphyrinato] cadmium (II) [CdTFPP]) and gold nanoparticles (AuNPs) for a rapid and sensitive determination of BPA was designed. To confirm the successful synthesis of CdTFPP, UV/vis, IR, and 1H NMR were employed. The detection platform CdTFPP/AuNPs/SPCE was prepared using a screen-printed electrode (SPCE), through the deposition of AuNPs and CdTFPP by drop-casting. Under optimized measuring conditions, the developed sensor exhibited two linear ranges from 10−10 to 10−7 M and 10−7 to 10−2 M with a limit of detection of 133 pM. Additionally, the CdTFPP/AuNPs/SPCE/ electrode demonstrated to present an excellent selectivity and reproducibility and to be a promising tool for the development of simple low-cost water quality monitoring system for BPA detection.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362839","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

Design of a Peroxidase-Based Gas Diffusion Electrode for Bioelectroenzymatic Applications 生物电酶用过氧化物酶气体扩散电极的设计

IF 2.7 3区化学

Electroanalysis Pub Date : 2025-02-04 DOI: 10.1002/elan.12015

Vladyslav Mishyn, Nunzio Giorgio G. Carducci, David P. Hickey, Sofiene Abdellaoui

{"title":"Design of a Peroxidase-Based Gas Diffusion Electrode for Bioelectroenzymatic Applications","authors":"Vladyslav Mishyn, Nunzio Giorgio G. Carducci, David P. Hickey, Sofiene Abdellaoui","doi":"10.1002/elan.12015","DOIUrl":"https://doi.org/10.1002/elan.12015","url":null,"abstract":"We report here the design and application of an all-in-one gas diffusion electrode (GDE) combined with surface immobilized horseradish peroxidase (HRP) capable of in situ generation of hydrogen peroxide (H2O2) from air and simultaneous oxidation of a model substrate (ABTS) within a single-cell electrochemical reactor. Carboxyl-functionalized multiwalled carbon nanotubes (MWCNT-COOH) were employed as an electrocatalyst for oxygen reduction reaction producing 719 ± 97 µM h−1 H2O2 at −0.2 V (vs Ag/AgCl) as an electron acceptor for HRP. We investigated two immobilization strategies to obtain HRP-modified biocathodes using covalent amide conjugation between primary amine groups of HRP and carboxyl groups of MWCNT-COOH (GDE/MWCNT-COOH/HRP) and entrapment into a cross-linked pyrene-modified linear poly(ethylenimine) matrix (GDE/MWCNT-COOH/Py-LPEI/HRP). Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) were used to characterize such surface modifications. The apparent catalytic activity achieved by HRP-modified biocathodes via either covalent conjugation or entrapment into a polymer film was 311 ± 31 U mg−1 and 174 ± 17 U mg−1, respectively, as compared to the activity of freely diffusing 188 ± 23 U mg−1. The interfaces were reused showing 55% and 82% residual activity after 5 consecutive cycles for GDE/MWCNT-COOH/HRP and GDE/MWCNT-COOH/Py-LPEI/HRP, respectively. Our findings illustrate prospects for integrating GDE and surface-bound peroxidases for H2O2-dependent electroenzymatic reactions, offering a promising platform for diverse applications in bioelectrosynthesis.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111886","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

A 3D Layered ASPC-CoS@Cos2 Composite Electrode Film via Simple Hydrothermal Method for High-Performance Supercapacitors 基于简单水热法的高性能超级电容器三维层状ASPC-CoS@Cos2复合电极膜

IF 2.7 3区化学

Electroanalysis Pub Date : 2025-02-04 DOI: 10.1002/elan.12014

Weihong Cai, Zhentao Liu, Weijing Mo, Yao Liang, Qixin Cheng, Huixin Jin, Meilong Wang

引用次数: 0

Design of a Peroxidase-Based Gas Diffusion Electrode for Bioelectroenzymatic Applications 生物电酶用过氧化物酶气体扩散电极的设计

IF 2.7 3区化学

Electroanalysis Pub Date : 2025-02-04 DOI: 10.1002/elan.12015

Vladyslav Mishyn, Nunzio Giorgio G. Carducci, David P. Hickey, Sofiene Abdellaoui

{"title":"Design of a Peroxidase-Based Gas Diffusion Electrode for Bioelectroenzymatic Applications","authors":"Vladyslav Mishyn, Nunzio Giorgio G. Carducci, David P. Hickey, Sofiene Abdellaoui","doi":"10.1002/elan.12015","DOIUrl":"https://doi.org/10.1002/elan.12015","url":null,"abstract":"We report here the design and application of an all-in-one gas diffusion electrode (GDE) combined with surface immobilized horseradish peroxidase (HRP) capable of in situ generation of hydrogen peroxide (H2O2) from air and simultaneous oxidation of a model substrate (ABTS) within a single-cell electrochemical reactor. Carboxyl-functionalized multiwalled carbon nanotubes (MWCNT-COOH) were employed as an electrocatalyst for oxygen reduction reaction producing 719 ± 97 µM h−1 H2O2 at −0.2 V (vs Ag/AgCl) as an electron acceptor for HRP. We investigated two immobilization strategies to obtain HRP-modified biocathodes using covalent amide conjugation between primary amine groups of HRP and carboxyl groups of MWCNT-COOH (GDE/MWCNT-COOH/HRP) and entrapment into a cross-linked pyrene-modified linear poly(ethylenimine) matrix (GDE/MWCNT-COOH/Py-LPEI/HRP). Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) were used to characterize such surface modifications. The apparent catalytic activity achieved by HRP-modified biocathodes via either covalent conjugation or entrapment into a polymer film was 311 ± 31 U mg−1 and 174 ± 17 U mg−1, respectively, as compared to the activity of freely diffusing 188 ± 23 U mg−1. The interfaces were reused showing 55% and 82% residual activity after 5 consecutive cycles for GDE/MWCNT-COOH/HRP and GDE/MWCNT-COOH/Py-LPEI/HRP, respectively. Our findings illustrate prospects for integrating GDE and surface-bound peroxidases for H2O2-dependent electroenzymatic reactions, offering a promising platform for diverse applications in bioelectrosynthesis.","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112093","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

A 3D Layered ASPC-CoS@Cos2 Composite Electrode Film via Simple Hydrothermal Method for High-Performance Supercapacitors 基于简单水热法的高性能超级电容器三维层状ASPC-CoS@Cos2复合电极膜

IF 2.7 3区化学

Electroanalysis Pub Date : 2025-02-04 DOI: 10.1002/elan.12014

Weihong Cai, Zhentao Liu, Weijing Mo, Yao Liang, Qixin Cheng, Huixin Jin, Meilong Wang

引用次数: 0

Cover Picture: (Electroanalysis 2/2025) 封面图片：（Electroanalysis 2/2025）

IF 2.7 3区化学

Electroanalysis Pub Date : 2025-02-02 DOI: 10.1002/elan.202580102

引用次数: 0