{"title":"Optimization of growth condition of n-type Bi2O3 semiconductors for improved photoelectrochemical applications","authors":"Sangeeta Ghosh, Debajit Laha, Sukumar Kundu, Swarnendu Baduri, Debasish Ray, Chinmoy Bhattacharya","doi":"10.1007/s10008-024-06152-6","DOIUrl":"10.1007/s10008-024-06152-6","url":null,"abstract":"<p>For the purpose of hydrogen production with free solar energy, the photoelectrochemical (PEC) water-splitting process grabbed attention as a sustainable route. PEC systems offer several benefits to produce hydrogen, including low environmental impact. For the PEC water oxidation process, Bi<sub>2</sub>O<sub>3</sub> (BO) is considered a very promising semiconductor due to its moderate bandgap of 2.65 eV and can exist in various phases. In order to determine the optimum growth temperature of Bi<sub>2</sub>O<sub>3</sub> for the PEC water splitting reaction and the photocatalytic dye degradation reaction, a series of bismuth (III) oxide semiconductors (SC) is developed in the present work using bismuth nitrate as a precursor varying the annealing temperatures (200–800 °C) in air. The optimized Bi<sub>2</sub>O<sub>3</sub> exhibits the highest photo-activity for the degradation of Rhodamine B target pollutants, which was confirmed by different physicochemical and photocatalytic experimental studies. The sample annealed at an optimized temperature of 650 °C achieved the maximum photocurrent of 0.19 mA cm<sup>−2</sup> for water splitting reaction in the presence of phosphate buffer solution with 0.1 M Na<sub>2</sub>SO<sub>4</sub> (pH 7), under periodic chopped illumination of UV–vis light with 100 mW cm<sup>−2</sup> light intensity at 1.17 V versus Ag/AgCl. The n-type nature of the semiconductor has been determined through Mott-Schottky analysis. Bi<sub>2</sub>O<sub>3</sub> facilitates the photo-activated electron–hole charge separation and migration due to its relative band position, and as a result, the stable performance of the semiconductor was also reported. The degradation reaction in the presence of scavenger materials such as triethanolamine (TEOA), tertiary butyl alcohol (TBA) and p-benzoquinone (BQ) has also been studied to propose the most plausible mechanism of degradation reaction.</p>","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":"29 1","pages":"117 - 128"},"PeriodicalIF":2.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Lavanya, K. Santhakumar, Annamalai Senthil Kumar
{"title":"Electrocatalytic reduction and sensing of hazardous Cr(VI) in water samples using in situ functionalized vanillin-catechol derivative/MWCNT-modified electrode","authors":"V. Lavanya, K. Santhakumar, Annamalai Senthil Kumar","doi":"10.1007/s10008-024-06096-x","DOIUrl":"10.1007/s10008-024-06096-x","url":null,"abstract":"<div><p>Vanillin (VAn), 4-hydroxy-3-methoxybenzaldehyde, is a natural organic compound classified as a phenolic aldehyde. It is the primary component responsible for the distinctive vanilla flavor and aroma found in vanilla beans. Beyond its culinary applications, VAn is utilized in the fragrance and cosmetic industries due to its pleasant scent. In this study, VAn was employed as a precursor for the in situ functionalization of redox-active catechol on multi-walled carbon nanotubes (MWCNTs)–modified electrode surface, designated as GCE/MWCNT@VAn-Redox, where VAn-Redox represents the redox-active product of VAn. This modified electrode functions as a surface-confined redox-active molecular species capable of efficiently electrocatalytically reducing hazardous Cr(VI) species in aqueous solutions. The chemically modified electrode (CME) exhibited a well-defined redox peak at a standard electrode potential, <i>E</i>° = 0.6 V vs Ag/AgCl, with a surface-excess value (<i>Γ</i>) of 14.2 × 10<sup>−9</sup> mol·cm<sup>−2</sup> in a pH 2 HCl + KCl environment. Characterization of the modified electrode was performed using various techniques, including FE-SEM, UV–Vis, Raman, FT-IR, HRMS (organic extract), and control electrochemical experiments. Amperometric <i>i-t</i> and batch injection analyses (BIA) were employed to evaluate the electrocatalytic reduction, transforming the screen-printed CME into a sensitive electrochemical sensor for toxic Cr(VI) species. Notably, this innovative electrode demonstrates no interference with dissolved oxygen or various biochemicals, such as mercury, calcium, zinc, sulfate, chloride, iodide, H<sub>2</sub>O<sub>2</sub>, cysteine, glucose, and urea.</p></div>","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":"29 1","pages":"81 - 94"},"PeriodicalIF":2.6,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ronaldo Augusto de S. Santos, Isabela de F. Schaffel, Gabriel Fernandes S. dos Santos, José Guilherme A. Rodrigues, Rafael de Q. Ferreira
{"title":"Voltammetric determination of hydroxymethylfurfural in honey using screen-printed carbon electrodes: optimization and in-house validation tests","authors":"Ronaldo Augusto de S. Santos, Isabela de F. Schaffel, Gabriel Fernandes S. dos Santos, José Guilherme A. Rodrigues, Rafael de Q. Ferreira","doi":"10.1007/s10008-024-06071-6","DOIUrl":"https://doi.org/10.1007/s10008-024-06071-6","url":null,"abstract":"<p>Bee honey has gained significant interest as a crucial commodity in Brazilian agribusiness, leading to its increased consumption in recent years because of its nutritional properties in humans. Legislation based on the <i>Codex Alimentarius</i> establishes quality control parameters essential for ensuring the safety and quality of honey. These parameters include the measurement of hydroxymethylfurfural (HMF), an indicator of honey quality. Currently, the primary methods for determining HMF concentration in honey are spectrophotometric and chromatographic tests. This study proposes a simpler alternative electroanalytical methodology that uses a screen-printed carbon electrode to monitor the HMF in honey. This portable technique offers advantages over commonly used methods, such as lower cost, similar efficacy, and requirement of only 70 µL of solution per analysis. Square-wave voltammetry was employed to determine HMF in Britton-Robinson buffer (pH 9.0), and the technique was optimized based on the experimental design, generating statistical chemical prediction results. The optimal values for modulation amplitude, step potential, and frequency were 81.5 mV, 22.5 mV, and 5 Hz, respectively. The recovery rate was within the limits established by AOAC International (80–110%), except for the concentration of 6.0 × 10<sup>−7</sup> mol L<sup>−1</sup>, which showed a 2.07% higher recovery, indicating a minor matrix effect. The calibration curve had an <i>R</i><sup>2</sup> value of 99%, with a limit of detection of 6.76 × 10<sup>−8</sup> mol L<sup>−1</sup> and a limit of quantification of 2.23 × 10<sup>−7</sup> mol L<sup>−1</sup>. Therefore, a rapid, cost-effective, and efficient methodology was established to quantify HMF in honey.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3><p>A simpler and portable electroanalytical methodology based on screen-printed carbon electrodes to determine the HMF in honey</p>","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":"60 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comparative analysis of pH sensing performance of nitrogen-doped ZnO on screen-printed silver and carbon electrodes","authors":"Alisha Mary Manoj, Leema Rose Viannie","doi":"10.1007/s10008-024-06078-z","DOIUrl":"10.1007/s10008-024-06078-z","url":null,"abstract":"<div><p>This paper presents a comparative study of the electrochemical pH sensing characteristics of N-ZnO on a carbon screen-printed electrode (N-ZnO/C) and a silver screen-printed electrode (N-ZnO/Ag). The surface-morphological properties of the film were evaluated using scanning electron microscopy. Electrochemical evaluation was carried out in the presence of common salts present in physiological fluids like NaCl and KCl. Cyclic voltammetry (CV) and chronoamperometry (CA) were carried out to evaluate the response characteristics of the solution under different pHs. Electrochemical impedance spectroscopy (EIS) was carried out to determine the interfacial parameters ruling the pH sensing mechanism for different electrode configurations. The studies revealed that the carbon-based electrodes exhibit stable behavior, with a sensitivity of 17.8 nA·cm<sup>−2</sup>/pH and a linear correlation (<i>r</i><sup>2</sup> = 0.996) across a range of acidic to basic conditions, thereby enhancing the sensor’s performance. The carbon electrodes demonstrated superior sensing properties, attributed to their improved stability and conductivity. This advancement in sensor technology offers promising potential for applications requiring reliable and precise measurements.</p></div>","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":"29 1","pages":"107 - 116"},"PeriodicalIF":2.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of electrodeposition of AuPt nanostructure thin films on the electrocatalytic activity of counter electrodes: DSSCs application","authors":"Hayet Lallali, Abdelhadi Bentouami, Fatma Zohra Tighilt, Samia Belhousse, Kahina Lasmi, Khaled Hamdani, Sabrina Sam, Amar Manseri","doi":"10.1007/s10008-024-06074-3","DOIUrl":"https://doi.org/10.1007/s10008-024-06074-3","url":null,"abstract":"<p>Enormous scientific interests focused on the improvement of the electrocatalytic activity of counter electrodes for their application in dye-sensitized solar cells (DSSCs). In this regards, we have elaborated a novel gold and platinum (AuPt) nanostructures via direct and indirect electrodeposition techniques; the first one is cyclic voltammetric, while the second one is a combination of amperometric and potentiostatic methods. The as-prepared AuPt nanomaterials, which were characterized by XRD, XPS, SEM, and CA, and electrochemical analysis such as cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization were employed as counter electrode in dye sensitized solar cells. The AuPt counter electrode prepared by cyclic voltammetric technique was the best electrocatalytic activity toward <span>({text{I}}_{3}^{-}/{text{I}}^{-})</span> reduction, low charge transfer resistance of 9.2 Ω cm<sup>2</sup>, and good chemical and electrochemical stability in the electrolyte. The assembled cell with the Au/Pt electrode provided a maximum power density of 2.35 mW cm<sup>−2</sup> with an efficiency of 2.35% under back illumination of 100 mW cm<sup>−2</sup> and AM 1.5 G.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Guilherme P. Oliveira, Lucas V. de Faria, Natalia M. Caldas, Amanda G. Batista, Suéllen F. L. do Nascimento, Murillo N. T. Silva, Fernanda N. Feiteira, Edson Nossol, Diego P. Rocha, Felipe S. Semaan, Wagner F. Pacheco, Rafael M. Dornellas
{"title":"Effortless lab-manufactured carbon and alumina-based composite sensors for enzymeless sensitive amperometric detection of dopamine in clinical and environmental samples","authors":"Guilherme P. Oliveira, Lucas V. de Faria, Natalia M. Caldas, Amanda G. Batista, Suéllen F. L. do Nascimento, Murillo N. T. Silva, Fernanda N. Feiteira, Edson Nossol, Diego P. Rocha, Felipe S. Semaan, Wagner F. Pacheco, Rafael M. Dornellas","doi":"10.1007/s10008-024-06079-y","DOIUrl":"https://doi.org/10.1007/s10008-024-06079-y","url":null,"abstract":"<p>Developing new sensors presenting low-cost, portability, and disposability features is of paramount in the electrochemical field. Thus, this work proposes the fabrication of lab-made composite electrodes using acrylonitrile butadiene styrene, graphite, and aluminum oxide. In this investigation, the amount of aluminum oxide (0 to 12.25 w/w) was carefully optimized, and its impact on the electrochemical performance of the electrode was observed using the ferri-ferro redox probe and dopamine (DOP) as a proof of concept. This innovative electrode was characterized by spectroscopy, morphological, elemental, and electrochemical techniques. Using the alumina-loaded electrode, significantly improved cyclic voltammetric responses regarding peak currents and peak-to-peak separation were obtained for both evaluated species. This sensor was integrated into the batch injection analysis system for amperometric monitoring of DOP in synthetic biological fluids (saliva and urine) and tap water. The developed method showed a wide linear range (10 to 1000 µmol L<sup>−1</sup>), a low detection limit (2.6 µmol L<sup>−1</sup>), and a high analytical frequency (182 analyses per hour). Furthermore, it was precise (RSD < 5%), accurate (recoveries between 90.5 and 107.3%), and selective. Therefore, it can be considered a low-cost alternative analytical tool for electrochemical sensing of DOP in samples of clinical and environmental interest.</p>","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":"106 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mahsa Sadat Sarmalek, Mehdi Adelifard, Seyed Ahmad Nabavi Amri
{"title":"Comparative study of the structural, optical, and electrochemical properties of γ-Ga2O3 synthesized by microwave hydrothermal and sol–gel techniques","authors":"Mahsa Sadat Sarmalek, Mehdi Adelifard, Seyed Ahmad Nabavi Amri","doi":"10.1007/s10008-024-06075-2","DOIUrl":"https://doi.org/10.1007/s10008-024-06075-2","url":null,"abstract":"<p>This research focused on the synthesis of gallium oxide (γ-Ga<sub>2</sub>O<sub>3</sub>) nanoparticles using sol–gel and hydrothermal techniques. X-ray diffraction (XRD), field emission electron microscopy (FESEM), UV–Vis spectrophotometer, Fourier transform infrared spectroscopy (FTIR), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), calculation of specific capacitance (SC), and specific capacitance (Q) techniques were used. XRD patterns showed the formation of the cubic phase of gallium oxide (γ-Ga<sub>2</sub>O<sub>3</sub>). The polyhedral and spherical grains can be seen in the FESEM images of the synthesized nanostructures. The band gap values were determined between 4.29 and 4.42 eV. The FTIR results indicate the formation of a gallium oxide structure. The cyclic voltammetry (CV) results are consistent with the redox reactions performed. Samples produced by sol–gel and hydrothermal synthesis, then microwave-annealed, have the highest capacity (SC). They show values of 1172.6 mAh g<sup>−1</sup> and 1261.9 mAh g<sup>−1</sup>, respectively. These results show that these nanoparticles are effective anodes for lithium-ion batteries.</p>","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":"119 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marina Medina, Vinícius José Carvalho, Leanderson Araujo da Silva, Gabriel Gonçalves Borges, Thiago Capelupi, Arthur Piani, Pedro Paes Mauriz, João Vitor Gomes, Juliana Ferreira de Brito
{"title":"Electrocatalytic contributions from Brazilian research groups for clean energy conversion and environmental remediation","authors":"Marina Medina, Vinícius José Carvalho, Leanderson Araujo da Silva, Gabriel Gonçalves Borges, Thiago Capelupi, Arthur Piani, Pedro Paes Mauriz, João Vitor Gomes, Juliana Ferreira de Brito","doi":"10.1007/s10008-024-06051-w","DOIUrl":"https://doi.org/10.1007/s10008-024-06051-w","url":null,"abstract":"<p>Our energy generation and other industrial processes on which our current lifestyle is based cause significant environmental impacts. Some widely employed industrial processes are major contributors to CO<sub>2</sub> emissions. A prime example is ammonia production, which represents a high energy consumption, utilizes natural gas, and generates hundreds of millions of tons of CO<sub>2</sub> annually. Proper waste treatment, alternatives to fossil fuels, and chemical compound production processes are crucial to address these issues. In this regard, (photo)electrochemical techniques such as electrocatalysis (EC) and photoelectrocatalysis (PEC) can aid in the clean and cost-effective treatment of wastewater while also generating new fuels and commercially valuable chemical compounds. Reduction reactions can be specifically applied to (i) CO<sub>2</sub> molecules, producing fuels; (ii) N<sub>2</sub> molecules, generating NH<sub>3</sub>; and (iii) H + species, producing H<sub>2</sub>. Oxidation reactions can be employed for organic and inorganic molecules present in real effluents, aiming to treat contaminated water. Electrocatalytic Brazilian research groups have been contributing not only to those redox reaction investigations but also to the synthesis of electrocatalysts for both reactions, making them more cost-effective, specific, and efficient, opening new perspectives in the generation of environmentally friendly chemical compounds with added value, clean energy conversion (non-petroleum energy), and minimizing the economic impact of environmental wastewater treatments. Thus, this work offers for the first time insights into the strengths, challenges, and prospects of electrochemical applications in the fields of energy and environmental remediation in Brazil, highlighting the country’s significance as a source of scientific knowledge on a global scale.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":"6 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Isaac A. Rodrigues, Darla de Vargas, Chádia Schissler, Allan de Moraes Lisbôa, Vladimir Lavayen, Jacqueline Arguello Da Silva
{"title":"Screen-printed carbon electrode modified with AgNPs obtained via green synthesis for acetaminophen determination","authors":"Isaac A. Rodrigues, Darla de Vargas, Chádia Schissler, Allan de Moraes Lisbôa, Vladimir Lavayen, Jacqueline Arguello Da Silva","doi":"10.1007/s10008-024-06070-7","DOIUrl":"https://doi.org/10.1007/s10008-024-06070-7","url":null,"abstract":"<p>Cyclic voltammetry (CV), differential pulse voltammetry (DPV), and square wave voltammetry (SWV) were employed to investigate the electrochemical behavior of acetaminophen (APAP) at a screen-printed carbon electrode (SPCE) modified with silver nanoparticles (AgNPs) synthesized via an eco-friendly process. <i>Hibiscus rosa-sinensis</i> flower extract acts as a stabilizing and reducing agent to produce AgNPs<i>.</i> UV–Vis spectroscopy, dynamic light scattering (DLS), and X-ray diffraction (XRD) analyses confirmed the formation of the AgNPs. The modified electrode, SPCE/AgNPs, demonstrated an excellent electrochemical response for APAP detection within a linear range of 0.5–100 µmol L<sup>−1</sup> with correlation coefficients of 0.995 and 0.993 for DPV and SWV methods, respectively. The limit of detection (LOD) and limit of quantification (LOQ) were 0.14 and 0.28 µmol L<sup>−1</sup> for the DPV method and 0.051 and 0.10 µmol L<sup>−1</sup> for the SWV method, respectively. The RSD for ten measurements was 0.54% and 0.35% for DPV and SWV, respectively. The proposed sensor was successfully applied to quantify APAP in pharmaceutical samples. Furthermore, it proved selective in determining APAP in the presence of common interfering compounds such as ascorbic acid and caffeine.</p>","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":"9 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}