Pub Date : 2022-12-31DOI: 10.14447/jnmes.v25i4.a06
Branka D. Pešovski, V. Krstić, S. Dimitrijević
This article presents some research into titanium electrode anodizing in H2SO4 solutions in the potential range –1 to 5 V at different scan rates (10, 50, 100 mV s–1) using cyclic voltammetry measurements. Linear potentiodynamic measurements had used before and after the oxide layer formed on the titanium surface. The characterization and the exact determination of the titanium oxides species on the Ti substrate surface had performed by XRD and SEM-EDS analyses. Three characteristic oxide peaks appeared in the electrochemical measurements. These had observed at 0.2 V, 2.3 V, and 3.5 V on cyclic voltammetry curves at all scan rates for all H2SO4 concentrations. Even more, cyclic voltammetry measurements showed that all peaks observed were evident even at higher scan rates. That suggested that robust oxidation of the Ti surface had occurred. Voltammetric tests showed that the passivation of the titanium surface was effective. XRD and SEM-EDS measurements confirmed the existence of TiO2 species in a crystalline form on the titanium surface after anodizing in 3M H2SO4 and annealing the anodized Ti electrode at 400℃ in the airflow. A significant increase in the loading of TiO2 film annealed at 400℃ of the previous anodized Ti anode in H2SO4 was registered.
{"title":"Electrochemical Characteristics of the Anodized Titanium Oxide Films in Sulfuric Acid","authors":"Branka D. Pešovski, V. Krstić, S. Dimitrijević","doi":"10.14447/jnmes.v25i4.a06","DOIUrl":"https://doi.org/10.14447/jnmes.v25i4.a06","url":null,"abstract":"This article presents some research into titanium electrode anodizing in H2SO4 solutions in the potential range –1 to 5 V at different scan rates (10, 50, 100 mV s–1) using cyclic voltammetry measurements. Linear potentiodynamic measurements had used before and after the oxide layer formed on the titanium surface. The characterization and the exact determination of the titanium oxides species on the Ti substrate surface had performed by XRD and SEM-EDS analyses. Three characteristic oxide peaks appeared in the electrochemical measurements. These had observed at 0.2 V, 2.3 V, and 3.5 V on cyclic voltammetry curves at all scan rates for all H2SO4 concentrations. Even more, cyclic voltammetry measurements showed that all peaks observed were evident even at higher scan rates. That suggested that robust oxidation of the Ti surface had occurred. Voltammetric tests showed that the passivation of the titanium surface was effective. XRD and SEM-EDS measurements confirmed the existence of TiO2 species in a crystalline form on the titanium surface after anodizing in 3M H2SO4 and annealing the anodized Ti electrode at 400℃ in the airflow. A significant increase in the loading of TiO2 film annealed at 400℃ of the previous anodized Ti anode in H2SO4 was registered.","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41807212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.14447/jnmes.v25i4.a08
S. Belkhiri, Z. Ghemari, M. L. Khene, Fethi Ben Mebarek, S. Saad
Numerical tools appear to be essential for modeling and designing devices based on superconducting materials. In this article different simulation results are presented, using a computer code based on the finite element method adopted for the resolution of the electromagnetic equations, in the case of an axisymmetric two-dimensional problem, with this code we study the variations of the different electromagnetic quantities. The second generation superconductor has been modeled as an interesting diamagnetic material as inductive pulse sources. The performance in magnetic field resistance, energy storage and thermal stability of the ribbon, known as YBCO, makes it possible to broaden its field of application. Two categories of machines have been proposed and analyzed, the first is classic and the second uses a superconducting ribbon. In addition, a comparative study between the two proposed models is carried out and the results are analyzed and discussed.
{"title":"Implantation of Coated Superconducting Materials in the Synchronous Machine for Superconducting Energy Storage","authors":"S. Belkhiri, Z. Ghemari, M. L. Khene, Fethi Ben Mebarek, S. Saad","doi":"10.14447/jnmes.v25i4.a08","DOIUrl":"https://doi.org/10.14447/jnmes.v25i4.a08","url":null,"abstract":"Numerical tools appear to be essential for modeling and designing devices based on superconducting materials. In this article different simulation results are presented, using a computer code based on the finite element method adopted for the resolution of the electromagnetic equations, in the case of an axisymmetric two-dimensional problem, with this code we study the variations of the different electromagnetic quantities. The second generation superconductor has been modeled as an interesting diamagnetic material as inductive pulse sources. The performance in magnetic field resistance, energy storage and thermal stability of the ribbon, known as YBCO, makes it possible to broaden its field of application. Two categories of machines have been proposed and analyzed, the first is classic and the second uses a superconducting ribbon. In addition, a comparative study between the two proposed models is carried out and the results are analyzed and discussed.","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42250836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-31DOI: 10.14447/jnmes.v25i3.a10
Daosen Liu, Shengsheng Wei, Dejun Wang
Graphene is an excellent piezoresistive material. The gauge factor of graphene mirrors the sensitivity of electromechanical devices. This paper mainly studies the gauge factors of different layers of graphene under different deformation conditions. Specifically, a theoretical model was combined with linearized Boltzmann transport equation, and the density function theory (DFT) to explore how the layer number of graphene affects sensitivity. The results show that monolayer graphene is slightly more sensitive than two-layer graphene, and significantly more sensitive than three-layer graphene and four- layer graphene. In particular, monolayer graphene remains highly sensitive under large deformation conditions, which gives monolayer graphene a significant advantage over other layers of graphene. Furthermore, a microelectromechanical system (MEMS) pressure sensor was proposed with monolayer graphene, and compared with previous similar sensors with multilayer graphene in terms of sensitivity.
{"title":"Sensitivity Comparison between Monolayer Graphene and Multilayer Graphene","authors":"Daosen Liu, Shengsheng Wei, Dejun Wang","doi":"10.14447/jnmes.v25i3.a10","DOIUrl":"https://doi.org/10.14447/jnmes.v25i3.a10","url":null,"abstract":"Graphene is an excellent piezoresistive material. The gauge factor of graphene mirrors the sensitivity of electromechanical devices. This paper mainly studies the gauge factors of different layers of graphene under different deformation conditions. Specifically, a theoretical model was combined with linearized Boltzmann transport equation, and the density function theory (DFT) to explore how the layer number of graphene affects sensitivity. The results show that monolayer graphene is slightly more sensitive than two-layer graphene, and significantly more sensitive than three-layer graphene and four- layer graphene. In particular, monolayer graphene remains highly sensitive under large deformation conditions, which gives monolayer graphene a significant advantage over other layers of graphene. Furthermore, a microelectromechanical system (MEMS) pressure sensor was proposed with monolayer graphene, and compared with previous similar sensors with multilayer graphene in terms of sensitivity.","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42432086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-31DOI: 10.14447/jnmes.v25i3.a02
M. Dhananjaya, Devendra Potnuru, B. Krishna Chaitnya, N. Patnana, J. K. Bokam
Multi-output converter plays a vital role in portable electronic and electric vehicle (EV) applications. In this regard, a new single-input dual output (SIDO) converter is proposed in this paper. Most of the single-input dual-output converter configurations presented by various researchers in the domain of multi-output converters function under particular assumptions about operational duty cycle and inductor current.Also, the issue of crossregulation is still prevalent while operating the loads in many SIDO converters.The proposed configuration generates two output voltages in boost and buck-boost modes without any constraints on the duty ratioor inductor currents. In addition, it doesn't encounter cross-regulation problems; subsequently, the output voltage V01 (V02) is not influenced by load changes in i02 (i01). To verify the feasibility and effectiveness of the proposed configuration, a 200 W prototype circuit is developed; simulation and experimental results are validated.
{"title":"A Single-Input Dual-Output DC-DC Converter for Powertrain of PEM Fuel Cell Vehicle","authors":"M. Dhananjaya, Devendra Potnuru, B. Krishna Chaitnya, N. Patnana, J. K. Bokam","doi":"10.14447/jnmes.v25i3.a02","DOIUrl":"https://doi.org/10.14447/jnmes.v25i3.a02","url":null,"abstract":"Multi-output converter plays a vital role in portable electronic and electric vehicle (EV) applications. In this regard, a new single-input dual output (SIDO) converter is proposed in this paper. Most of the single-input dual-output converter configurations presented by various researchers in the domain of multi-output converters function under particular assumptions about operational duty cycle and inductor current.Also, the issue of crossregulation is still prevalent while operating the loads in many SIDO converters.The proposed configuration generates two output voltages in boost and buck-boost modes without any constraints on the duty ratioor inductor currents. In addition, it doesn't encounter cross-regulation problems; subsequently, the output voltage V01 (V02) is not influenced by load changes in i02 (i01). To verify the feasibility and effectiveness of the proposed configuration, a 200 W prototype circuit is developed; simulation and experimental results are validated.","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48407254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-31DOI: 10.14447/jnmes.v25i3.a08
Jagram Meena, H. Chandra, S. Warkar
ZnO nanoparticles (ZnO NPs) were in situ mixed with carboxymethyl tamarind kernel gum to generate the new biocomposite. High-resolution transmission electron microscopy (HR-TEM), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FTIR), x-ray diffraction analysis (XRD), and dynamic light scattering (DLS)were used to characterize the CMTKG/ZnO nanocomposites. Numerous characterizations were utilized to prove that ZnO NPs had been integrated into the biopolymer matrix. The standard size of the CMTKG/ZnO nanocomposites was developed to be greater than 32–40 nm using high-resolution transmission electron microscopy and x-ray analysis de-Scherer methods. Chromium (VI) was removed from the aqueous solution using the nanocomposite (CMTKG/ZnO) as an adsorbent. The nanocomposite reached its maximum adsorption during 80 minutes of contact time, 30 mg/L chromium (VI) concentration, 2.0 g/L adsorbent part, and 7.0 pH. Further research into the antifungal activity of CMTKG/ZnO nanocomposites against Aspergillus flavus MTCC-2799 was conducted.
{"title":"Carboxymethyl Tamarind Kernel Gum /ZnO- Biocomposite: As an Antifungal and Hazardous Metal Removal Agent","authors":"Jagram Meena, H. Chandra, S. Warkar","doi":"10.14447/jnmes.v25i3.a08","DOIUrl":"https://doi.org/10.14447/jnmes.v25i3.a08","url":null,"abstract":"ZnO nanoparticles (ZnO NPs) were in situ mixed with carboxymethyl tamarind kernel gum to generate the new biocomposite. High-resolution transmission electron microscopy (HR-TEM), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FTIR), x-ray diffraction analysis (XRD), and dynamic light scattering (DLS)were used to characterize the CMTKG/ZnO nanocomposites. Numerous characterizations were utilized to prove that ZnO NPs had been integrated into the biopolymer matrix. The standard size of the CMTKG/ZnO nanocomposites was developed to be greater than 32–40 nm using high-resolution transmission electron microscopy and x-ray analysis de-Scherer methods. Chromium (VI) was removed from the aqueous solution using the nanocomposite (CMTKG/ZnO) as an adsorbent. The nanocomposite reached its maximum adsorption during 80 minutes of contact time, 30 mg/L chromium (VI) concentration, 2.0 g/L adsorbent part, and 7.0 pH. Further research into the antifungal activity of CMTKG/ZnO nanocomposites against Aspergillus flavus MTCC-2799 was conducted.","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43514481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-31DOI: 10.14447/jnmes.v25i3.a04
Jie Ying Gao, Yuwei Yang, Hai-qin Gu
Proton exchange membrane (PEM) is one of the most popular fuel cells for renewable energy production, and this paper presents a DC/DC boost converter structure to improve energy efficiency. To achieve high output power as well as constant output voltage, a combined method consisting of proportional-integral controller and adaptive sliding mode technique is designed. Also, due to the use of adaptive technique, the proposed technique has the ability to cover the effects of uncertainty with an unknown high limit and in addition to improving the quality of output power and voltage of PEM, it eliminates permanent tracking error and guarantees closed loop system stability. To show the operational implementation capability and flexibility of the method, FPGA has been used, which in addition to showing real-time performance, provides the ability to execute the controller at high speeds. Operationality and the possibility of practical implementation of the planned scheme on the existing systems provide the possibility of increasing the efficiency of energy extraction without further investment. The stability of the closed-loop system is achieved using Lyapunov technique and the results of simulation and comparison indicate the optimal performance of the system under the planned scheme and high efficiency in comparison with existing approaches.
{"title":"A FPGA based PI adaptive sliding mode controller for PEM fuel cell with boost converter","authors":"Jie Ying Gao, Yuwei Yang, Hai-qin Gu","doi":"10.14447/jnmes.v25i3.a04","DOIUrl":"https://doi.org/10.14447/jnmes.v25i3.a04","url":null,"abstract":"Proton exchange membrane (PEM) is one of the most popular fuel cells for renewable energy production, and this paper presents a DC/DC boost converter structure to improve energy efficiency. To achieve high output power as well as constant output voltage, a combined method consisting of proportional-integral controller and adaptive sliding mode technique is designed. Also, due to the use of adaptive technique, the proposed technique has the ability to cover the effects of uncertainty with an unknown high limit and in addition to improving the quality of output power and voltage of PEM, it eliminates permanent tracking error and guarantees closed loop system stability. To show the operational implementation capability and flexibility of the method, FPGA has been used, which in addition to showing real-time performance, provides the ability to execute the controller at high speeds. Operationality and the possibility of practical implementation of the planned scheme on the existing systems provide the possibility of increasing the efficiency of energy extraction without further investment. The stability of the closed-loop system is achieved using Lyapunov technique and the results of simulation and comparison indicate the optimal performance of the system under the planned scheme and high efficiency in comparison with existing approaches.","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42973390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-31DOI: 10.14447/jnmes.v25i3.a03
A. Agarwal
Both offshore wind and hydrogen generation are increasingly seen as central to global decarbonization. The objective of current research is to investigate the effect of wind turbine height of Vertical Axis Wind Turbine (VAWT) on hydrogen generation. The numerical investigation of VAWT is conducted using techniques of Computational Fluid Dynamics. The VAWT design is developed in Solidworks design software and CFD analysis is conducted using ANSYS CFX software. The CFD analysis conducted on VAWT aided to determine the torque generated from it at 10m/s wind velocity determining the system impacts and ability of electrolyzer technology to accommodate the varying input from wind turbine. The research findings have shown that height of VAWT blade has significant effect on power generation. The power generation from VAWT increases with increase in blade height. The maximum hydrogen mass is generated for 850mm height wind turbine i.e., 2.09Kg. The external wind flow conditions have significant effect on power generation from VAWT and therefore the effect of varying air flow conditions needs to be investigated.
{"title":"Computational Investigation of Vertical Axis Wind Turbine in Hydrogen Gas Generation Using PEM Electrolysis","authors":"A. Agarwal","doi":"10.14447/jnmes.v25i3.a03","DOIUrl":"https://doi.org/10.14447/jnmes.v25i3.a03","url":null,"abstract":"Both offshore wind and hydrogen generation are increasingly seen as central to global decarbonization. The objective of current research is to investigate the effect of wind turbine height of Vertical Axis Wind Turbine (VAWT) on hydrogen generation. The numerical investigation of VAWT is conducted using techniques of Computational Fluid Dynamics. The VAWT design is developed in Solidworks design software and CFD analysis is conducted using ANSYS CFX software. The CFD analysis conducted on VAWT aided to determine the torque generated from it at 10m/s wind velocity determining the system impacts and ability of electrolyzer technology to accommodate the varying input from wind turbine. The research findings have shown that height of VAWT blade has significant effect on power generation. The power generation from VAWT increases with increase in blade height. The maximum hydrogen mass is generated for 850mm height wind turbine i.e., 2.09Kg. The external wind flow conditions have significant effect on power generation from VAWT and therefore the effect of varying air flow conditions needs to be investigated.","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44502729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-31DOI: 10.14447/jnmes.v25i3.a06
V. Deepa, B. Kavitha, S. Aejitha, H. Aswathaman, Sethuramachandran Thanikaikarasan, N. Senthil kumar
lectrochemical studies of methyl parathion on novel nanocomposites electrode surface systems reached distinction in recent years because of their application in trace determination. Cyclic voltammetric behaviours of methyl parathion on nanocomposites modified glassy carbon electrodes at different pH in aqueous ethanol media were carried out. Influence of pH led to the selection of pH 1.0 as the best pH for the electroanalysis of methyl parathion. Voltamogram of pesticide exhibits two cathodic and one anodic peak responding at all pH media with the novel modified electrode system. The modified electrode shows one redox couple around the potential range from 0.1 to 0.3 V and one reduction peak around at - 0.75 V with higher peak current responding to the modified electrode. The reduction peaks were selected for stripping analysis owing to their maximum current response. The experimental parameters were optimized using the differential pulse stripping mode. A calibration plot was made. The determination limit and standard deviations were arrived. The applicability of the method was also verified in a sample soil analysis.
{"title":"Fabrication of copper incorporated graphene oxide nanocomposites used for electrochemical determination of methyl parathion contaminants","authors":"V. Deepa, B. Kavitha, S. Aejitha, H. Aswathaman, Sethuramachandran Thanikaikarasan, N. Senthil kumar","doi":"10.14447/jnmes.v25i3.a06","DOIUrl":"https://doi.org/10.14447/jnmes.v25i3.a06","url":null,"abstract":"lectrochemical studies of methyl parathion on novel nanocomposites electrode surface systems reached distinction in recent years because of their application in trace determination. Cyclic voltammetric behaviours of methyl parathion on nanocomposites modified glassy carbon electrodes at different pH in aqueous ethanol media were carried out. Influence of pH led to the selection of pH 1.0 as the best pH for the electroanalysis of methyl parathion. Voltamogram of pesticide exhibits two cathodic and one anodic peak responding at all pH media with the novel modified electrode system. The modified electrode shows one redox couple around the potential range from 0.1 to 0.3 V and one reduction peak around at - 0.75 V with higher peak current responding to the modified electrode. The reduction peaks were selected for stripping analysis owing to their maximum current response. The experimental parameters were optimized using the differential pulse stripping mode. A calibration plot was made. The determination limit and standard deviations were arrived. The applicability of the method was also verified in a sample soil analysis.","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43374168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The purpose of this study was to determinate ofloxacin, the approach of electrospinning and electrochemical was adopted, metal oxide cobalt tetroxide (Co3O4)/graphene (GR) nanomaterials were electrodeposited on the surface of glassy carbon electrode, then prepared a new type of nanocomposite electrode (Co3O4/GR/GCE), it was successfully used to measure ofloxacin. The experiments show that the surface morphology of the modified electrode was characterized by scanning electron microscopy, and the Co3O4 nanoparticles and GR could be well modified on the surface of the glassy carbon electrode. The determination conditions of ofloxacin were optimized by the differential pulse voltametry (DPV). Under the optimal conditions, the linear relationship ranged from 0.45 to 170 μM, and the minimum detection limit was 0.16 μM (S/N = 3). Moreover, the recovery rate in the actual drug was good, and the relative standard deviations were all less than 5%. The impacts of the obtained results indicate that the modified electrode has good electrocatalytic performance for ofloxacin, and has good repeatability and practicability, and can significantly improve the detection sensitivity.
{"title":"Synthesized Cobalt Tetroxide-Graphene Composite Film by Electrospinning and Modified Glassy Carbon Electrode for Ofloxacin Determination","authors":"Yuxin Zhang, Yong Li, Pengchong Yin, Yongxing Hao, Ruizhu Zhang","doi":"10.14447/jnmes.v25i3.a09","DOIUrl":"https://doi.org/10.14447/jnmes.v25i3.a09","url":null,"abstract":"The purpose of this study was to determinate ofloxacin, the approach of electrospinning and electrochemical was adopted, metal oxide cobalt tetroxide (Co3O4)/graphene (GR) nanomaterials were electrodeposited on the surface of glassy carbon electrode, then prepared a new type of nanocomposite electrode (Co3O4/GR/GCE), it was successfully used to measure ofloxacin. The experiments show that the surface morphology of the modified electrode was characterized by scanning electron microscopy, and the Co3O4 nanoparticles and GR could be well modified on the surface of the glassy carbon electrode. The determination conditions of ofloxacin were optimized by the differential pulse voltametry (DPV). Under the optimal conditions, the linear relationship ranged from 0.45 to 170 μM, and the minimum detection limit was 0.16 μM (S/N = 3). Moreover, the recovery rate in the actual drug was good, and the relative standard deviations were all less than 5%. The impacts of the obtained results indicate that the modified electrode has good electrocatalytic performance for ofloxacin, and has good repeatability and practicability, and can significantly improve the detection sensitivity.","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49544077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-31DOI: 10.14447/jnmes.v25i3.a05
A. Shoba, B. Kavitha, P. Matheswaran, N. Jagadeeswari, Sethuramachandran Thanikaikarasan, N. Senthil kumar
Chemically produced coppercontaining MnO2 nanoparticles were studied using FTIR, UV-Vis spectroscopy, XRD, AFM, cyclic voltammetric and charge/discharge behaviour. Mixed nanocomposites have a crystalline size of 50 nm was calculated through Debye Scherrer’s equation from XRD analysis. The FTIR spectra were recorded region 400- 4000 cm-1, of clean and doped Manganese dioxide nanoparticles. Mn–O can be ascribed to the stretching vibration band of MnO2 nanoparticles at 631 cm-1. The bending and stretching vibrations of the O-H group are ascribed to the fundamental absorption peaks at 1620 cm-1 and 3400 cm-1.AFM is used to characterize the impact of surface roughness on the fundamental properties of MnO2, copper induced nanocomposites of MnO2 particles. Electrochemical impedance and voltammetric experiments are used to investigate the behaviour of individual and mixed nanocomposites as supercapacitors.
{"title":"Copper nanoparticles incorporated manganese dioxide nanocomposites for electrochemical capacitance application","authors":"A. Shoba, B. Kavitha, P. Matheswaran, N. Jagadeeswari, Sethuramachandran Thanikaikarasan, N. Senthil kumar","doi":"10.14447/jnmes.v25i3.a05","DOIUrl":"https://doi.org/10.14447/jnmes.v25i3.a05","url":null,"abstract":"Chemically produced coppercontaining MnO2 nanoparticles were studied using FTIR, UV-Vis spectroscopy, XRD, AFM, cyclic voltammetric and charge/discharge behaviour. Mixed nanocomposites have a crystalline size of 50 nm was calculated through Debye Scherrer’s equation from XRD analysis. The FTIR spectra were recorded region 400- 4000 cm-1, of clean and doped Manganese dioxide nanoparticles. Mn–O can be ascribed to the stretching vibration band of MnO2 nanoparticles at 631 cm-1. The bending and stretching vibrations of the O-H group are ascribed to the fundamental absorption peaks at 1620 cm-1 and 3400 cm-1.AFM is used to characterize the impact of surface roughness on the fundamental properties of MnO2, copper induced nanocomposites of MnO2 particles. Electrochemical impedance and voltammetric experiments are used to investigate the behaviour of individual and mixed nanocomposites as supercapacitors.","PeriodicalId":16447,"journal":{"name":"Journal of New Materials For Electrochemical Systems","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42836190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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