John O. Anyanwu, K. Oguzie, T. E. Ogbulie, C. Akalezi, Emeka Emanuel Oguzie
Bromophenol blue (BB) is an important triphenylmethane derivative widely used in research and industry as a dye or colorant for silk, leather, and drugs. BB has a high proclivity for water contamination because of its high solubility and stability, causing damage to living organisms even in low quantities. This study assessed the feasibility of electrochemical and biological for the decolorization of BB using graphite-copper electrode and indigenous microorganisms, respectively. It was found that effectiveness of electrochemical treatment improves with higher electrolysis time, current density, and electrolyte concentration, drops with rising pH, and shows a nonlinear pattern with temperature. The microbial strains identified as Acinetobacter baumaniu, Serratia marcescens, Aspergillus niger, Aspergillus flavus, Bacillus megaterium, Rhizopus stolonifer, and Bacillus subtilis performed poorly, irrespective of the dye/mineral salt ratio. The electrochemical technique was much more effective for decolorizing bromophenol blue dye-contaminated water. The computational results showed clearly that bromine atoms are the most susceptible sites for attack by oxidizing species and, thus, the onset of BB-decolorization.
{"title":"Electrochemical and microbial treatment of bromophenol blue dye in aqueous solution","authors":"John O. Anyanwu, K. Oguzie, T. E. Ogbulie, C. Akalezi, Emeka Emanuel Oguzie","doi":"10.5599/jese.1882","DOIUrl":"https://doi.org/10.5599/jese.1882","url":null,"abstract":"Bromophenol blue (BB) is an important triphenylmethane derivative widely used in research and industry as a dye or colorant for silk, leather, and drugs. BB has a high proclivity for water contamination because of its high solubility and stability, causing damage to living organisms even in low quantities. This study assessed the feasibility of electrochemical and biological for the decolorization of BB using graphite-copper electrode and indigenous microorganisms, respectively. It was found that effectiveness of electrochemical treatment improves with higher electrolysis time, current density, and electrolyte concentration, drops with rising pH, and shows a nonlinear pattern with temperature. The microbial strains identified as Acinetobacter baumaniu, Serratia marcescens, Aspergillus niger, Aspergillus flavus, Bacillus megaterium, Rhizopus stolonifer, and Bacillus subtilis performed poorly, irrespective of the dye/mineral salt ratio. The electrochemical technique was much more effective for decolorizing bromophenol blue dye-contaminated water. The computational results showed clearly that bromine atoms are the most susceptible sites for attack by oxidizing species and, thus, the onset of BB-decolorization.","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"31 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78401836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Moritz Schlagmann, J. Balendonck, Thomas Otto, Michelle Brandao Silva de Assis, M. Mertig, Stefan Hess
The world population is continuously increasing. Smart farming is required to keep up with this development by producing more food in a sustainable way. In many new sensor solution developments, the results of the sensor itself is at the target, but the whole solution fails to meet the requirements of the agriculture sensing use cases: the developments suffer from singular approaches with a constricted view solely on the sensor, which might be exchangeable. In this article, we present a holistic approach that can help to overcome these challenges. This approach considers the whole use case, from sense, compute, and connect to power. The approach is discussed with the example of the PLANtAR project, where we develop a soil nitrate sensor and a new leaf wetness and microclimate sensor for application in a greenhouse. The resulting sensor is integrated into a sensor node and compared to a state-of-the-art system. The work shows what is needed to assess the best tradeoffs for agriculture use cases based on a horticulture application.
{"title":"Development of sensor nodes and sensors for smart farming","authors":"Moritz Schlagmann, J. Balendonck, Thomas Otto, Michelle Brandao Silva de Assis, M. Mertig, Stefan Hess","doi":"10.5599/jese.1645","DOIUrl":"https://doi.org/10.5599/jese.1645","url":null,"abstract":"The world population is continuously increasing. Smart farming is required to keep up with this development by producing more food in a sustainable way. In many new sensor solution developments, the results of the sensor itself is at the target, but the whole solution fails to meet the requirements of the agriculture sensing use cases: the developments suffer from singular approaches with a constricted view solely on the sensor, which might be exchangeable. In this article, we present a holistic approach that can help to overcome these challenges. This approach considers the whole use case, from sense, compute, and connect to power. The approach is discussed with the example of the PLANtAR project, where we develop a soil nitrate sensor and a new leaf wetness and microclimate sensor for application in a greenhouse. The resulting sensor is integrated into a sensor node and compared to a state-of-the-art system. The work shows what is needed to assess the best tradeoffs for agriculture use cases based on a horticulture application.","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"122 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88748570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Global efforts to mitigate climate change are causing a transition from non-renewable energy resources (fossil fuels) to renewable energy resources (wind, solar, hydroelectricity, geothermal). This energy transition to sustainably meet the world’s growing needs for electricity, heating, cooling, and power for transport is widely considered to be one of the biggest challenges facing humanity in this century. The transition is enabled by improvements in generation and storage technologies critical to harvesting inherently intermittent renewable energy. Moreover, growing needs for smaller, lighter, more powerful portable electronic devices and more powerful electric vehicles suitable for long-range transportation have further fostered the demand for dispatchable and efficient electrical energy storage. These have catalyzed rapid development and commercialization of high-energy and lightweight rechargeable batteries, primarily based on lithium. However, lithium-enabled rechargeable batteries are plagued with challenges such as uncontrolled surface/interface (low safety), sluggish transport & reaction kinetics (slow charging), & relatively rare abundance of the metal (high cost). Moving beyond lithium necessitates the development of safe & fast-charging rechargeable batteries based on relatively abundant metals (i.e. Na, Zn, Al, Fe, etc.).
{"title":"Battery technologies: lithium & beyond","authors":"Prayag Biswal","doi":"10.5599/jese.1973","DOIUrl":"https://doi.org/10.5599/jese.1973","url":null,"abstract":"Global efforts to mitigate climate change are causing a transition from non-renewable energy resources (fossil fuels) to renewable energy resources (wind, solar, hydroelectricity, geothermal). This energy transition to sustainably meet the world’s growing needs for electricity, heating, cooling, and power for transport is widely considered to be one of the biggest challenges facing humanity in this century. The transition is enabled by improvements in generation and storage technologies critical to harvesting inherently intermittent renewable energy. Moreover, growing needs for smaller, lighter, more powerful portable electronic devices and more powerful electric vehicles suitable for long-range transportation have further fostered the demand for dispatchable and efficient electrical energy storage. These have catalyzed rapid development and commercialization of high-energy and lightweight rechargeable batteries, primarily based on lithium. However, lithium-enabled rechargeable batteries are plagued with challenges such as uncontrolled surface/interface (low safety), sluggish transport & reaction kinetics (slow charging), & relatively rare abundance of the metal (high cost). Moving beyond lithium necessitates the development of safe & fast-charging rechargeable batteries based on relatively abundant metals (i.e. Na, Zn, Al, Fe, etc.).","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"56 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85843137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Vasyliev, V. Vorobyova, Dmytro Uschapovskiy, Mykhailo Kotyk, O. Linyucheva
Local electrochemical deposition is an emerging technique, used in the field of additive manufacturing. The advantage of electrochemical additive manufacturing lies in the utilization of room temperature electrolyte and permits to manufacture microscale objects with high precision. The increase in deposition current increases the deposition area, so measures are to be taken to focus the electric field. This work describes the influence of polarization curve slope on the accuracy of local deposition, both experimentally and by computer modelling. The copper was deposited using rotating anode on the surface of stainless steel from sulphate electrolyte. The influence of electrolyte composition on the accuracy of deposition was investigated. The profile of deposited parts was analyzed by profilometry and microscopy. The increased amount of sulfuric acid and presence of the additive in the electrolyte was shown to increase the accuracy of deposition by changing the slope of cathodic polarization curve from 320 to 1100 mA V–1cm–2).
局部电化学沉积是一种新兴的技术，应用于增材制造领域。电化学增材制造的优势在于利用常温电解液，可以高精度地制造微尺度物体。沉积电流的增大使沉积面积增大，因此需要采取措施使电场集中。本文通过实验和计算机模拟，描述了极化曲线斜率对局部沉积精度的影响。采用旋转阳极法在不锈钢表面沉积铜。研究了电解液组成对沉积精度的影响。用轮廓术和显微镜分析了沉积零件的轮廓。通过改变阴极极化曲线的斜率(从320 mA (V-1cm-2)增加到1100 mA (V-1cm-2))，表明硫酸用量的增加和电解质中添加剂的存在提高了沉积的精度。
{"title":"Influence of polarization curve slope on the accuracy of local copper electrodeposition from sulphate electrolyte","authors":"G. Vasyliev, V. Vorobyova, Dmytro Uschapovskiy, Mykhailo Kotyk, O. Linyucheva","doi":"10.5599/jese.1899","DOIUrl":"https://doi.org/10.5599/jese.1899","url":null,"abstract":"Local electrochemical deposition is an emerging technique, used in the field of additive manufacturing. The advantage of electrochemical additive manufacturing lies in the utilization of room temperature electrolyte and permits to manufacture microscale objects with high precision. The increase in deposition current increases the deposition area, so measures are to be taken to focus the electric field. This work describes the influence of polarization curve slope on the accuracy of local deposition, both experimentally and by computer modelling. The copper was deposited using rotating anode on the surface of stainless steel from sulphate electrolyte. The influence of electrolyte composition on the accuracy of deposition was investigated. The profile of deposited parts was analyzed by profilometry and microscopy. The increased amount of sulfuric acid and presence of the additive in the electrolyte was shown to increase the accuracy of deposition by changing the slope of cathodic polarization curve from 320 to 1100 mA V–1cm–2).","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"5 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84378517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Salakhova, D. Tagiyev, P. Kalantarova, K. Ibrahimova, Y.E. Alizada, Ramila Huseynova, Irana Cabbarova
Based on the study of current-voltage dependences during the co-deposition nt electrical reduction of rhenium and molybdenum from sulfuric acid on a Pt electrode, conditions for deposition of alloy nanocoatings of the Re-Mo system were established. The influence of various factors, such as the content of components in the electrolyte, current density, temperature, acidity of solutions, etc., on the composition and quality of coatings was studied. It was established that with an increase in the content of rhenium in the electrolyte and increase of current density, the content of rhenium in the alloy is increased. The composition and morphology of Re-Mo thin films electrodeposited on a platinum electrode were analyzed. The phase composition of the obtained films was determined by XRD using a diffractometer, and the study of the morphology of Re-Mo films on platinum and nickel substrates was performed using a scanning electron microscope. Based on this study, the optimal conditions for the deposition molybdenum with rhenium and the required composition of the electrolyte were selected. For the obtaining rhenium-molybdenum alloys containing 50-80 wt.% Re, the following electrolyte composition can be recommended: 0.0015M Na2MoO4 + 0.0035M KReO4 + 2M H2SO4, pH 0.4; t = 75°C, electrode - Pt.
{"title":"Electrochemical obtaining of rhenium-molybdenum alloys","authors":"E. Salakhova, D. Tagiyev, P. Kalantarova, K. Ibrahimova, Y.E. Alizada, Ramila Huseynova, Irana Cabbarova","doi":"10.5599/jese.1696","DOIUrl":"https://doi.org/10.5599/jese.1696","url":null,"abstract":"Based on the study of current-voltage dependences during the co-deposition nt electrical reduction of rhenium and molybdenum from sulfuric acid on a Pt electrode, conditions for deposition of alloy nanocoatings of the Re-Mo system were established. The influence of various factors, such as the content of components in the electrolyte, current density, temperature, acidity of solutions, etc., on the composition and quality of coatings was studied. It was established that with an increase in the content of rhenium in the electrolyte and increase of current density, the content of rhenium in the alloy is increased. The composition and morphology of Re-Mo thin films electrodeposited on a platinum electrode were analyzed. The phase composition of the obtained films was determined by XRD using a diffractometer, and the study of the morphology of Re-Mo films on platinum and nickel substrates was performed using a scanning electron microscope. Based on this study, the optimal conditions for the deposition molybdenum with rhenium and the required composition of the electrolyte were selected. For the obtaining rhenium-molybdenum alloys containing 50-80 wt.% Re, the following electrolyte composition can be recommended: 0.0015M Na2MoO4 + 0.0035M KReO4 + 2M H2SO4, pH 0.4; t = 75°C, electrode - Pt.","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"20 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90518585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mukhtiar Ahmed, A. Hanan, M. N. Lakhan, A. H. Shar, I. Soomro, Bin Niu, Yang Yang
Electrocatalytically active nanocomposites play a vital role in energy generation, conversion, and storage technologies. Transition metal-based catalysts such as nickel and iron and their pnictide (phosphide), and chalcogenide (selenide) compounds exhibit good activity for hydrogen evolution reaction (HER) in the alkaline environment. In this study, transition metals-based catalysts (Ni-P-Se, Fe-P-Se, and Ni-Fe-P-Se) solutions were prepared using a simple one-pot method. Prepared solutions were deposited on Ni foam, and different characterization techniques were used to determine the composition, structure, and morphology of as-prepared catalysts. Furthermore, it was found that Ni-Fe-P-Se as a cathode material showed better HER performance compared to other investigated materials with the overpotential value of 316 mV at 10 mA cm-2 current density and 89 mV dec-1 Tafel slope value. The stability tests of the as-prepared catalyst confirmed that the synergistic effect between various elements enhances the electrocatalytic performance for up to 24 hours, providing a fair, stable nature of Ni-Fe-P-Se based sample.
电催化活性纳米复合材料在能源产生、转换和储存技术中起着至关重要的作用。镍和铁等过渡金属基催化剂及其磷酸基(磷化物)和硫族(硒化物)化合物在碱性环境下表现出良好的析氢反应活性。本研究采用简单的一锅法制备了过渡金属基催化剂(Ni-P-Se、Fe-P-Se和Ni-Fe-P-Se)溶液。将制备好的溶液沉积在泡沫镍上，并使用不同的表征技术来确定制备的催化剂的组成、结构和形态。此外，Ni-Fe-P-Se作为正极材料，在10 mA cm-2电流密度下的过电位值为316 mV, dac -1 Tafel斜率为89 mV，具有较好的HER性能。制备的催化剂的稳定性测试证实，各种元素之间的协同作用提高了电催化性能长达24小时，提供了一个公平，稳定的Ni-Fe-P-Se基样品。
{"title":"One-pot synthesis of crystalline structure: Nickel-iron phosphide and selenide for hydrogen production in alkaline water splitting","authors":"Mukhtiar Ahmed, A. Hanan, M. N. Lakhan, A. H. Shar, I. Soomro, Bin Niu, Yang Yang","doi":"10.5599/jese.1721","DOIUrl":"https://doi.org/10.5599/jese.1721","url":null,"abstract":"Electrocatalytically active nanocomposites play a vital role in energy generation, conversion, and storage technologies. Transition metal-based catalysts such as nickel and iron and their pnictide (phosphide), and chalcogenide (selenide) compounds exhibit good activity for hydrogen evolution reaction (HER) in the alkaline environment. In this study, transition metals-based catalysts (Ni-P-Se, Fe-P-Se, and Ni-Fe-P-Se) solutions were prepared using a simple one-pot method. Prepared solutions were deposited on Ni foam, and different characterization techniques were used to determine the composition, structure, and morphology of as-prepared catalysts. Furthermore, it was found that Ni-Fe-P-Se as a cathode material showed better HER performance compared to other investigated materials with the overpotential value of 316 mV at 10 mA cm-2 current density and 89 mV dec-1 Tafel slope value. The stability tests of the as-prepared catalyst confirmed that the synergistic effect between various elements enhances the electrocatalytic performance for up to 24 hours, providing a fair, stable nature of Ni-Fe-P-Se based sample.","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"47 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87419258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The 3D electro-Fenton technique is, due to its high efficiency, one of the technologies suggested to eliminate organic pollutants in wastewater. The type of particle electrode used in the 3D electro-Fenton process is one of the most crucial variables because of its effect on the formation of reactive species and the source of iron ions. The electrolytic cell in the current study consisted of graphite as an anode, carbon fiber (CF) modified with graphene as a cathode, and iron foam particles as a third electrode. A response surface methodology (RSM) approach was used to optimize the 3D electro-Fenton process. The RSM results revealed that the quadratic model has a high R2 of 99.05 %. At 4 g L-1 iron foam particles, time of 5 h, and 1 g of graphene, the maximum efficiency of phenol removal of 92.58 % and chemical oxygen demand (COD) of 89.33 % were achieved with 32.976 kWh kg-1 phenol of consumed power. Based on the analysis of variance (ANOVA) results, the time has the highest impact on phenol removal efficiency, followed by iron foam and graphene dosage. In the present study, the 3D electro-Fenton technique with iron foam partials and carbon fiber modified with graphene was detected as a great choice for removing phenol from aqueous solutions due to its high efficiency, formation of highly reactive species, with excellent iron ions source electrode.
三维电fenton技术由于其高效率，被认为是消除废水中有机污染物的技术之一。3D电芬顿过程中使用的颗粒电极类型是最关键的变量之一，因为它会影响反应物质的形成和铁离子的来源。目前研究的电解电池由石墨作为阳极，石墨烯修饰的碳纤维(CF)作为阴极，泡沫铁颗粒作为第三电极组成。采用响应面法(RSM)对三维电fenton工艺进行优化。RSM结果表明，二次型模型具有99.05%的高R2。在4 g L-1泡沫铁颗粒、5 h、1 g石墨烯条件下，苯酚的最大去除率为92.58%，化学需氧量(COD)为89.33%，苯酚的消耗功率为32.976 kWh kg-1。方差分析结果显示，时间对苯酚去除率的影响最大，其次是泡沫铁和石墨烯用量。在本研究中，采用泡沫铁部分和石墨烯改性碳纤维的3D电fenton技术被认为是去除水溶液中苯酚的一个很好的选择，因为它效率高，形成高活性的物种，具有优秀的铁离子源电极。
{"title":"Phenol removal by electro-Fenton process using a 3D electrode with iron foam as particles and carbon fibre modified with graphene","authors":"Hind H. Thwaini, R. Salman","doi":"10.5599/jese.1806","DOIUrl":"https://doi.org/10.5599/jese.1806","url":null,"abstract":"The 3D electro-Fenton technique is, due to its high efficiency, one of the technologies suggested to eliminate organic pollutants in wastewater. The type of particle electrode used in the 3D electro-Fenton process is one of the most crucial variables because of its effect on the formation of reactive species and the source of iron ions. The electrolytic cell in the current study consisted of graphite as an anode, carbon fiber (CF) modified with graphene as a cathode, and iron foam particles as a third electrode. A response surface methodology (RSM) approach was used to optimize the 3D electro-Fenton process. The RSM results revealed that the quadratic model has a high R2 of 99.05 %. At 4 g L-1 iron foam particles, time of 5 h, and 1 g of graphene, the maximum efficiency of phenol removal of 92.58 % and chemical oxygen demand (COD) of 89.33 % were achieved with 32.976 kWh kg-1 phenol of consumed power. Based on the analysis of variance (ANOVA) results, the time has the highest impact on phenol removal efficiency, followed by iron foam and graphene dosage. In the present study, the 3D electro-Fenton technique with iron foam partials and carbon fiber modified with graphene was detected as a great choice for removing phenol from aqueous solutions due to its high efficiency, formation of highly reactive species, with excellent iron ions source electrode.","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"300 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73587159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zahra Arab, Sara Jafarian, H. Karimi-Maleh, Leila Roozbeh Nasiraie, Mohammad Ahmadi
An electrochemical sensor was introduced as an analytical tool for monitoring caffeic acid in food samples. This analytical tool was amplified by cadmium oxide decorated on single wall carbon nanotubes as a new catalyst and showed a powerful ability to sensing of caffeic acid in food products. The presence of cadmium oxide decorated on single wall carbon nanotubes catalyst improved the oxidation signal of caffeic acid about 2.4 times at optimum conditions. The pH investigation confirmed that the redox reaction of caffeic acid was pH dependent and showed maximum sensitivity at pH 7.0. The paste electrode amplified with cadmium oxide decorated on single wall carbon nanotubes was successfully monitored caffeic acid in the concentration range 0.02–200 µM with a detection limit of 9.0 nM, respectively. The standard addition strategy showed a recovery range of 97.96 – 102.59 % to the measurement of caffeic acid in fruit juice, white and red wine that was acceptable for the fabrication of a new analytical tool in food monitoring.
{"title":"Electrochemical sensing of caffeic acid antioxidant in wine samples using carbon paste electrode amplified with CdO/SWCNTs","authors":"Zahra Arab, Sara Jafarian, H. Karimi-Maleh, Leila Roozbeh Nasiraie, Mohammad Ahmadi","doi":"10.5599/jese.1701","DOIUrl":"https://doi.org/10.5599/jese.1701","url":null,"abstract":"An electrochemical sensor was introduced as an analytical tool for monitoring caffeic acid in food samples. This analytical tool was amplified by cadmium oxide decorated on single wall carbon nanotubes as a new catalyst and showed a powerful ability to sensing of caffeic acid in food products. The presence of cadmium oxide decorated on single wall carbon nanotubes catalyst improved the oxidation signal of caffeic acid about 2.4 times at optimum conditions. The pH investigation confirmed that the redox reaction of caffeic acid was pH dependent and showed maximum sensitivity at pH 7.0. The paste electrode amplified with cadmium oxide decorated on single wall carbon nanotubes was successfully monitored caffeic acid in the concentration range 0.02–200 µM with a detection limit of 9.0 nM, respectively. The standard addition strategy showed a recovery range of 97.96 – 102.59 % to the measurement of caffeic acid in fruit juice, white and red wine that was acceptable for the fabrication of a new analytical tool in food monitoring.","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"63 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81438566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carbon electrode materials have generated considerable research interest in recent years due to their ease of use, higher charge transfer kinetics, and cost-effectiveness. Malachite green (MG) is an organic compound with metallic-looking powdered green crystals, which got its name from the color of malachite. MG can be easily converted to leuco-malachite green, a colorless form (LMG). Because both MG forms are dangerous for human health, detecting them in the environment is important. Many researchers across the globe worked on MG detection using various techniques, and this article provides brief information on their results. In this review article, some specific information about electrochemical detection techniques, which are frequently employed for MG determination, is discussed. This review highlights some advances in voltammetric methods using carbon-based electrodes such as glassy carbon, carbon paste, pencil graphite, and their chemically modified forms in various configurations that can be used for the electrochemical detection of MG. Some of the future scopes in using these advanced, carbon-based electrodes in MG determination are also discussed.
{"title":"Some progress in voltammetric methods to detect malachite green in real samples using carbon electrodes","authors":"Madhusudan Dasnur Nanjappa, G. Jayaprakash","doi":"10.5599/jese.1480","DOIUrl":"https://doi.org/10.5599/jese.1480","url":null,"abstract":"Carbon electrode materials have generated considerable research interest in recent years due to their ease of use, higher charge transfer kinetics, and cost-effectiveness. Malachite green (MG) is an organic compound with metallic-looking powdered green crystals, which got its name from the color of malachite. MG can be easily converted to leuco-malachite green, a colorless form (LMG). Because both MG forms are dangerous for human health, detecting them in the environment is important. Many researchers across the globe worked on MG detection using various techniques, and this article provides brief information on their results. In this review article, some specific information about electrochemical detection techniques, which are frequently employed for MG determination, is discussed. This review highlights some advances in voltammetric methods using carbon-based electrodes such as glassy carbon, carbon paste, pencil graphite, and their chemically modified forms in various configurations that can be used for the electrochemical detection of MG. Some of the future scopes in using these advanced, carbon-based electrodes in MG determination are also discussed.","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"66 3 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81108058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
For an efficient flow battery operation, knowledge of the state of charge of the battery is essential. Monitoring the state of charge of both half cells is advantageous concerning a timely detection of crossover processes. We present the first results for amperometric and electrochemical quartz crystal microbalance measurements in a vanadium flow battery test setup. By validating with half cell potential measurements as well as ex situ titration we investigate the applicability of both electrochemical methods for an in situ half cell state of charge monitoring.
{"title":"Feasibility study of amperometric and electrochemical quartz crystal microbalance measurements for in situ state of charge monitoring in vanadium flow batteries","authors":"C. Weidlich, Felix Lulay, Matthias Wieland","doi":"10.5599/jese.1699","DOIUrl":"https://doi.org/10.5599/jese.1699","url":null,"abstract":"For an efficient flow battery operation, knowledge of the state of charge of the battery is essential. Monitoring the state of charge of both half cells is advantageous concerning a timely detection of crossover processes. We present the first results for amperometric and electrochemical quartz crystal microbalance measurements in a vanadium flow battery test setup. By validating with half cell potential measurements as well as ex situ titration we investigate the applicability of both electrochemical methods for an in situ half cell state of charge monitoring.","PeriodicalId":15660,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"58 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90692366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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