ECS Advances最新文献_第7页

Influence of Nafion-Coating of Ag/Ag2O/C Electrodes on Long-Term Performance of an Electroosmotic Pump Ag/Ag2O/C电极纳米涂层对电渗泵长期性能的影响

ECS Advances Pub Date : 2023-04-11 DOI: 10.1149/2754-2734/accbd4

Jae Hong Kim, Mi Hyun Lee, Young Wook Chang, Y. Song, Chang Jung Kim

{"title":"Influence of Nafion-Coating of Ag/Ag2O/C Electrodes on Long-Term Performance of an Electroosmotic Pump","authors":"Jae Hong Kim, Mi Hyun Lee, Young Wook Chang, Y. Song, Chang Jung Kim","doi":"10.1149/2754-2734/accbd4","DOIUrl":"https://doi.org/10.1149/2754-2734/accbd4","url":null,"abstract":"Ag/Ag2O electrodes were fabricated on both carbon fiber paper (CP) and carbon fiber cloth (CC) substrates via galvanostatic electrodeposition to develop an electroosmotic (EO) pump. The results showed that Ag was deposited along the carbon fibers and further grew into Ag particles. The Ag loading on CP was higher than that of CC at the same current density, and the difference increased further with the current density increase. Nafion coating was applied on the as-electrodeposited Ag/Ag2O/CP electrode to prevent the degradation of Ag particles using dip coating, followed by drop coating. The Nafion-coated Ag/Ag2O/CP electrodes showed much better electroosmotic pump performance and long-term stability than the uncoated electrodes, revealing that the Nafion ionomer can enhance the proton conductivity and mitigate the degradation of Ag particles during the electrochemical reactions. The EO pumps built with Nafion-modified Ag/Ag2O/CP electrodes with an active area of 0.28 cm2 generated a maximum pressure of 157 kPa and a maximum flow rate of 28.21 ul min−1. The Postmortem analysis of the pumped working fluids collected from the EO pumps operated at a constant potential for three days was performed to further investigate the effects of Nafion coating on Ag degradation.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133979972","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}

引用次数: 0

Tuning of Structural and Morphological Characteristics of V2O5 Thin Films Using Low Energy 16 keV N + for Optical and Wetting Applications 用低能16kev N +调谐V2O5薄膜的光学和润湿性能

ECS Advances Pub Date : 2023-04-06 DOI: 10.1149/2754-2734/accafc

B. Priya, Priya Jasrotia, I. Sulania, D. K. Chaudhary, Rajeev Gupta, A. Verma, Raj Kumar, T. Kumar

引用次数: 1

A Novel Pentachlorophenol Electrochemical Sensor Based on Nickel-Cobalt Layered Double Hydroxide Doped with Reduced Graphene Oxide Composite 基于镍钴层状双氢氧化物掺杂还原氧化石墨烯复合材料的新型五氯苯酚电化学传感器

ECS Advances Pub Date : 2023-03-03 DOI: 10.1149/2754-2734/acc117

Hicham Meskher, F. Achi, Fatah Ben Moussa, A. Henni, Hakim Belkhelfa

{"title":"A Novel Pentachlorophenol Electrochemical Sensor Based on Nickel-Cobalt Layered Double Hydroxide Doped with Reduced Graphene Oxide Composite","authors":"Hicham Meskher, F. Achi, Fatah Ben Moussa, A. Henni, Hakim Belkhelfa","doi":"10.1149/2754-2734/acc117","DOIUrl":"https://doi.org/10.1149/2754-2734/acc117","url":null,"abstract":"A highly sensitive non-enzymatic electrochemical pentachlorophenol (5-CP) sensor was successfully fabricated employing a multi-component sensing platform made of nickel-cobalt layered double hydroxide (NiCo-LDH) supported on green organic-inorganic nanohybrid (rGO-CuO) drop-casted on a gold electrode (AuE). The chemical and morphological properties of the as-synthesized nanostructures were investigated and confirmed by infrared spectroscopy (ATR) and scanning electron microscopy (SEM). The electrochemical measurements demonstrated that both the good conductivity of and the large active surface area of the hierarchical structure of NiCo-LDH/rGO-CuO favor the electrochemical redox reaction of 5-CP. In the optimized procedure, we have evaluated the analytical performance of the NiCo-LDH/rGO-CuO/AuE using cyclic voltammetry based on the current intensities of the redox peaks. Our findings indicate that the developed NiCo-LDH/rGO-CuO/AuE sensor exhibits a wide linear range from 1 to 50 μM while the limit of detection was estimated to be 12.64 nM for 5-CP. Moreover, the suggested 5-CP sensor displayed an excellent stability that might provide a robust sensing platform for the practical and reliable detection of 5-CP in various real samples.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114283636","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}

引用次数: 2

Screen-Printed Electrodes Based on Conductive Inks of Polyaniline/Graphene Hybrids and Their Application to Progesterone Detection 基于聚苯胺/石墨烯杂化导电油墨的丝网印刷电极及其在孕酮检测中的应用

ECS Advances Pub Date : 2023-02-24 DOI: 10.1149/2754-2734/acbeca

G. M. de Araújo, Milton Alexandre Cardoso, L. Codognoto, C. Brett, F. R. Simões

{"title":"Screen-Printed Electrodes Based on Conductive Inks of Polyaniline/Graphene Hybrids and Their Application to Progesterone Detection","authors":"G. M. de Araújo, Milton Alexandre Cardoso, L. Codognoto, C. Brett, F. R. Simões","doi":"10.1149/2754-2734/acbeca","DOIUrl":"https://doi.org/10.1149/2754-2734/acbeca","url":null,"abstract":"Screen-printed electrodes (SPEs) were produced using conductive inks based on hybrids of polyaniline (PAni) and reduced graphene oxide (rGO). Cyclic voltammetry (CV) showed peaks characteristic of the PAni redox behavior in acidic media for all the modified SPEs. Electrochemical impedance spectroscopy (EIS) showed a significant decrease in the charge-transfer resistances, from 930 Ω for SPE/G:PAni to 544 Ω for SPE/G:PAni-rGO1 and to 303 Ω for SPE/G:PAni-rGO2 with just 0.06% and 0.12% in mass of rGO, respectively, in the final mass composition of the conductive inks. The SPEs were evaluated in the determination of progesterone (P4) hormone in neutral medium (phosphate buffer solution, pH 7.0). The CV results showed higher current signals at SPE/G:PAni-rGO1 compared with SPE/G and SPE/G:PAni, indicating a synergistic effect of PAni-rGO1 in the determination of P4. EIS also showed significant changes in the electrochemical double-layer capacitances in the presence of P4. The limits of detection (LOD) and quantification (LOQ) were, respectively, 211 nmol l−1 and 703 nmol l−1. This method is a simple, scalable and low-cost alternative for the fabrication of electrodes based on PAni-rGO hybrids, with synergic properties, aiming for future applications in sensors.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122186558","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}

引用次数: 0

Photocatalytic and Antimicrobial Performance Evaluation of Reusable MoS2 Nanoflowers under Visible Light 二硫化钼纳米花在可见光下的光催化和抗菌性能评价

ECS Advances Pub Date : 2023-02-16 DOI: 10.1149/2754-2734/acbc8c

S. Selvaraj, Mathew K. Francis, P. Bhargav, Nafis Ahmed

{"title":"Photocatalytic and Antimicrobial Performance Evaluation of Reusable MoS2 Nanoflowers under Visible Light","authors":"S. Selvaraj, Mathew K. Francis, P. Bhargav, Nafis Ahmed","doi":"10.1149/2754-2734/acbc8c","DOIUrl":"https://doi.org/10.1149/2754-2734/acbc8c","url":null,"abstract":"2D semiconductor material, Molybdenum Disulfide (MoS2), with unique properties similar to that of graphene, is considered as a potential candidate for photocatalytic and antimicrobial applications. In the current work, MoS2 was prepared by a simple hydrothermal method using sodium molybdate and thiourea as precursors. The calculated band gap values of MoS2 grown at 200 °C and 180 °C were 2.1 eV and 1.98 eV, respectively. Flower like morphology was observed from FESEM analysis. Multi layered structure of MoS2 was confirmed from the difference the peak value obtained for A1g and E1 2g vibrational modes observed from Raman spectra. The reusability of the synthesized MoS2 was analyzed against MB dye degradation. The pristine MoS2 removed ∼98% of the dye molecules from the water under the minimum wattage (20 W) of visible light in 180 min. The catalyst retained good stability even after the third degradation, confirming the reusability of MoS2. The disk diffusion method was used to evaluate the antimicrobial activity of the grown MoS2 nanostructures. The gram-positive and gram-negative bacteria used in present study were Staphylococcus aureus, Klebsiella pneumoniae, Escherichia coli and Bacillus serius. Investigation of the antibacterial activity of MoS2 against these four different pathogens was carried out in detail and the resistance function was measured.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129262941","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}

引用次数: 3

Application of Hierarchical Clustering Approach for Prediction of Grain Size in Heat-Treated EN9 Steel 层次聚类方法在热处理EN9钢晶粒度预测中的应用

ECS Advances Pub Date : 2023-02-10 DOI: 10.1149/2754-2734/acbb1a

T. Sahoo, Susmita Panda, S. R. Biswal

引用次数: 0

Efficient Oxidation of Ethanol at Ru@Pt Core-Shell Catalysts in a Proton Exchange Membrane Electrolysis Cell 在Ru@Pt核壳催化剂下质子交换膜电解池中乙醇的高效氧化

ECS Advances Pub Date : 2023-02-07 DOI: 10.1149/2754-2734/acb9a6

A.H. Ali, P. Pickup

{"title":"Efficient Oxidation of Ethanol at Ru@Pt Core-Shell Catalysts in a Proton Exchange Membrane Electrolysis Cell","authors":"A.H. Ali, P. Pickup","doi":"10.1149/2754-2734/acb9a6","DOIUrl":"https://doi.org/10.1149/2754-2734/acb9a6","url":null,"abstract":"Efficient electrochemical oxidation of ethanol in fuel cells and electrolysis cells is important for generating power and hydrogen, respectively, from renewable resources. PtRu alloys are most widely employed as catalysts because they provide high activities at low potentials. However, they produce acetic acid as the main product from ethanol, which results in low faradaic and overall efficiencies. In contrast, Pt provides high selectivity for the complete oxidation of ethanol to CO2, but low activities. Ru@Pt core–shell nanoparticles can improve efficiency by delivering higher activity than Pt and enhanced formation of CO2 relative to PtRu. Here, Ru@Pt catalysts have been prepared by depositing Pt onto a commercial carbon-supported Ru catalyst. The influence of the amount of Pt deposited has been investigated in H2SO4(aq) at ambient temperature and in a proton exchange membrane cell at 80 °C. Activities for ethanol oxidation were intermediate between those for commercial Pt and PtRu catalysts, providing higher currents than Pt at low potentials, and higher currents than PtRu at high potentials. Faradaic yields of CO2 (38%–48%) were greatly increased relative to the PtRu alloy catalyst (11%). This will optimize the efficiency of ethanol oxidation in PEM electrolysis and fuel cells.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128287436","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}

引用次数: 2

Review—Role of Nanomaterials in Screenprinted Electrochemical Biosensors for Detection of Covid-19 and for Post-Covid Syndromes 纳米材料在检测Covid-19和Covid-19后综合征的丝网印刷电化学生物传感器中的作用综述

ECS Advances Pub Date : 2023-02-02 DOI: 10.1149/2754-2734/acb832

Dola Sundeep, Eswaramoorthy K. Varadharaj, Umadevi Kovuri, R. Jhansi

{"title":"Review—Role of Nanomaterials in Screenprinted Electrochemical Biosensors for Detection of Covid-19 and for Post-Covid Syndromes","authors":"Dola Sundeep, Eswaramoorthy K. Varadharaj, Umadevi Kovuri, R. Jhansi","doi":"10.1149/2754-2734/acb832","DOIUrl":"https://doi.org/10.1149/2754-2734/acb832","url":null,"abstract":"Covid-19 still remains as global pandemic surging with different variants like alpha, beta, gamma, delta and most omicronin various countries resulted into SARS-CoV-2. An escalation in random testing for Covid-19 is considered as golden standard by World Health Organization (WHO) to control the spread of Corona virus. RT-PCR and nucleic acid hybridization strategies are the two highly sensitive outstanding tests used for the detection of SARS-CoV-2 in the DNA by the former and RNA/DNA by the later. Apart from the test for virus, antigen and antibodies other alternative hematological tests like CRP, Ferritine, IL-6, Blood Platelets and WBC and plasma became essential for the detection and management of Covid-19. Overcoming the limitations a rapid, efficient, low-cost and easy-to-implement test kits are in imperative need to meet the requirement. Electrochemical sensors are considered as potential, ultra-fast and point-of-care sensors used as self-testing kits. In this work, a meta review of various modified electrodes with different nanomaterials such as graphene, CNTs, and nano-dopants used as electrochemical sensors in association with testing various different parameters for detection of Covid-19. A detailed discussion on the merits and demerits of present testing patterns and scope of screen-printed electrochemical sensors modified with different nanomaterials and their advantages are presented.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115745047","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}

引用次数: 3

Fault Tolerant Gamma-Minus Network 容错伽马负网络

ECS Advances Pub Date : 2023-01-31 DOI: 10.1149/2754-2734/acb786

Shilpa Gupta

{"title":"Fault Tolerant Gamma-Minus Network","authors":"Shilpa Gupta","doi":"10.1149/2754-2734/acb786","DOIUrl":"https://doi.org/10.1149/2754-2734/acb786","url":null,"abstract":"In large-scale supercomputers thousands of processors are connected together to their respective memory modules which are controlled by several control units connected in parallel. Large data streams have to be communicated between these processors and memories through interconnection networks. Multistage interconnection network (MIN) is an efficient way to provide these communications at a very reasonable cost. For such large systems MIN employed should be highly reliable and fast to meet the desired specifications of these high speed switch fabrics. In this paper two new architectures of MIN are proposed which are named as fault-tolerant Gamma-Minus (FTGM-1 & FTGM-2) networks. These proposed architectures are multipath MIN with totally disjoint paths and are highly reliable and fault tolerant. The routing algorithm proposed for these structures is simple distance tag routing with non-backtracking which overcomes rerouting overheads and hence improve communication delays. The proposed MIN ensures multiple fault tolerance at each stage including input and output stage with minimal horizontal distance between source node to destination node. For validating the results, a comparison has been presented between existing MINs with these proposed designs. The proposed MINs outperform the existing MIN in terms of reliability, fault tolerance and up to some extent cost as well.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123015122","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}

引用次数: 1

Hydrothermally Synthesized ZnSnO3 Nanoflakes Based Low-Cost Sensing Device for High Performance CO2 Monitoring 基于水热合成ZnSnO3纳米片的低成本高性能CO2监测传感装置

ECS Advances Pub Date : 2023-01-23 DOI: 10.1149/2754-2734/acb562

Ajeet Singh, Sanjay Yadav, A. Verma, S. Sikarwar, B. Yadav

{"title":"Hydrothermally Synthesized ZnSnO3 Nanoflakes Based Low-Cost Sensing Device for High Performance CO2 Monitoring","authors":"Ajeet Singh, Sanjay Yadav, A. Verma, S. Sikarwar, B. Yadav","doi":"10.1149/2754-2734/acb562","DOIUrl":"https://doi.org/10.1149/2754-2734/acb562","url":null,"abstract":"This work reports a room temperature operative ZnSnO3 nanoflakes-based CO2 gas sensor. The perovskite ZnSnO3 nanoflakes are synthesized by a one-pot hydrothermal technique. The prepared material was characterized via XRD, SEM, UV-visible spectroscopy, and DLS measurement for confirming the crystal structure, surface morphology, optical properties, and size distribution. The X-ray diffraction pattern revealed that ZnSnO3 was in the orthorhombic phase and average crystallite size examined by the Scherrer formula was 8.05 nm. Optical studies were done by the UV–vis spectroscopy and a direct optical band gap was found to be 3.27 eV. The surface morphology of ZnSnO3 was found to nanoflakes are almost uniform dimensions. The fabricated sensor device of ZnSnO3 detected the CO2 gas at room temperature (RT) for different concentrations. The best sensor response was found to be 4.93 for 1000 ppm of CO2 whereas at 200 ppm the response and recovery times were found to be 5.92 s and 7.23 s respectively. HOMO-LUMO gap energy of ZnSnO3 without and with interaction from CO2 molecule was found 1.165 eV and 1.577 eV, respectively. DFT studies are used for a better understanding of sensing mechanisms.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129787844","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}

引用次数: 2