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Journal of Ovonic Research最新文献

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Synthesis of nano-Co3O4-based electrocatalysts and their performance in direct methanol fuel cells 纳米co3o4基电催化剂的合成及其在直接甲醇燃料电池中的性能
4区 材料科学
Journal of Ovonic Research Pub Date : 2025-11-15 DOI: 10.15251/jor.2025.216.675
Xinnan Lu
{"title":"Synthesis of nano-Co3O4-based electrocatalysts and their performance in direct methanol fuel cells","authors":"Xinnan Lu","doi":"10.15251/jor.2025.216.675","DOIUrl":"https://doi.org/10.15251/jor.2025.216.675","url":null,"abstract":"This study reports the synthesis of nano-Co3O4 catalysts with tailored size and morphology using PEG as a dispersant, optimizing their application in DMFCs. By varying the molecular weight of PEG (400, 800, and 20000), the Co3O4 catalysts exhibited distinct structural and catalytic properties. The Co3O4 synthesized with PEG20000 showed the smallest crystallite size of 19.8 nm, the highest BET surface area of 168.7 m2 /g, and a uniform morphology with well-dispersed nanoscale particles. Electrochemical analysis revealed that the Co3O4- modified Pt/C catalyst prepared with PEG20000 achieved a peak current density of 1.58 mA/cm2 . The catalyst also demonstrated an onset potential of 0.19 V and a stability retention of 78.6% after 400 s of operation, outperforming Pt/C (68.4%). These enhancements are attributed to the synergistic effect providing oxygen species for intermediate oxidation and mitigating CO poisoning. The findings highlight the potential of Co3O4-modified Pt/C catalysts as efficient, cost-effective alternatives for DMFCs, with superior catalytic activity, stability, and methanol tolerance. This work offers insight into the role of dispersants in tailoring catalyst properties for energy applications.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"21 6","pages":"675-691"},"PeriodicalIF":0.0,"publicationDate":"2025-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://doi.org/10.15251/jor.2025.216.675","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147332787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancement of friction behavior and self-healing capabilities in nitrile rubber through ZnO nanoparticles incorporation ZnO纳米颗粒掺入增强丁腈橡胶的摩擦行为和自愈能力
4区 材料科学
Journal of Ovonic Research Pub Date : 2025-04-14 DOI: 10.15251/jor.2025.212.163
Xinyue Wang, Jingwei Qin, W. Li, Lei Xie, X. M. Zheng
{"title":"Enhancement of friction behavior and self-healing capabilities in nitrile rubber through ZnO nanoparticles incorporation","authors":"Xinyue Wang, Jingwei Qin, W. Li, Lei Xie, X. M. Zheng","doi":"10.15251/jor.2025.212.163","DOIUrl":"https://doi.org/10.15251/jor.2025.212.163","url":null,"abstract":"This study investigates a novel approach to enhance XNBR composites through the incorporation of synthesized ZnO nanoparticles with controlled morphology. The ZnO nanoparticles, synthesized via a modified co-precipitation method, exhibited uniform size distribution with 90% of particles ranging between 35-55 nm. Dynamic mechanical analysis revealed dual transition behavior, with a distinct ionic transition peak emerging above the glass transition temperature. The storage modulus at room temperature increased from 3.2 MPa to 7.8 MPa with 7.5 phr ZnO loading, while maintaining elongation at break above 600%. Tribological testing demonstrated significant improvements, with the composite achieving a 78% reduction in wear rate and maintaining stable friction coefficients under dry sliding conditions. Temperature-dependent self-healing studies showed progressive improvement in recovery rates, with maximum efficiency achieved at 80°C. The formation of ionic clusters, confirmed through FTIR analysis, played a crucial role in both mechanical reinforcement and self-healing mechanisms. The optimized composite demonstrated a 30% increase in crosslink density compared to conventional ZnO-cured systems, leading to enhanced thermal stability with char yield improving from 8% to 15% at 600°C.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"21 2","pages":"163-176"},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://doi.org/10.15251/jor.2025.212.163","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemical performance of rice grains like high Mn-doped anatase TiO2 nanoparticles as lithium-ion batteries electrode material 米粒状高锰掺杂锐钛矿 TiO2 纳米颗粒作为锂离子电池电极材料的电化学性能
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-06-06 DOI: 10.15251/jor.2024.203.357
H. Q. Zhao, L. Li, Q. S. Yuan
{"title":"Electrochemical performance of rice grains like high Mn-doped anatase TiO2 nanoparticles as lithium-ion batteries electrode material","authors":"H. Q. Zhao, L. Li, Q. S. Yuan","doi":"10.15251/jor.2024.203.357","DOIUrl":"https://doi.org/10.15251/jor.2024.203.357","url":null,"abstract":"Rice grain-shaped high Mn-doped anatase TiO2(TMO) nanocrystals have been fabricated through redox method at room temperature using several simple chemical reagents. The samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy(XPS), scanning electron microscopy(SEM), transmission electron microscopy and High-resolution transmission electron microscopy (TEM & HRTEM). It indicates that the manganese element was successfully incorporated into the anatase TiO2 nanostructure, and the atomic Mn-to-Ti could reach up to 18.2%. We also analyzed the merits and weaknesses of the nanostructured TMO in electrochemistry by dint of some relevant measures. And the cause of influence on the TMO electrochemical properties was briefly discussed.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"77 S338","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141377519","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}
引用次数: 0
Modified nonlinear ion drift model for TiO2 memristor: a temperature dependent study 修正的二氧化钛记忆晶闸管非线性离子漂移模型：随温度变化的研究
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-06-06 DOI: 10.15251/jor.2024.203.345
S. Panda, C. S. Dash, R. Jothiramalingam, H. Al-Lohedan
{"title":"Modified nonlinear ion drift model for TiO2 memristor: a temperature dependent study","authors":"S. Panda, C. S. Dash, R. Jothiramalingam, H. Al-Lohedan","doi":"10.15251/jor.2024.203.345","DOIUrl":"https://doi.org/10.15251/jor.2024.203.345","url":null,"abstract":"The creation and optimisation of memristor models with different topologies and physical mechanisms have received increasing attention in recent years. Memristors, known for their unique resistive switching mechanism, have garnered significant interest as promising components for next-generation computing. However, to effectively design and test memristor-based circuits, it is crucial to have a mathematical representation of the experimentally determined current-voltage characteristics of memristors. This paper proposes a model and conducts an analysis that offers insights into memristor technology, beginning with its characteristics and extending to simulations involving various parameters. The proposed model and its dependency on temperature are implemented using MATLAB. The model captures changes in current characteristics concerning the fundamental voltage without using any window functions. Thus, it accurately represents the variation in memristance with temperature, contributing to a more precise and observed modelling approach.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"50 s174","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141376553","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}
引用次数: 0
Probing optoelectronic and thermoelectric properties of double perovskite halides Li2CuInY6 (Y = Cl, Br, I) for energy conversion applications 探测双包晶卤化物 Li2CuInY6（Y = Cl、Br、I）的光电和热电特性，促进能量转换应用
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-05-15 DOI: 10.15251/jor.2024.203.333
N. Ahmad Noor, F. Nasrullah, H. Elansary, S. Mumtaz
{"title":"Probing optoelectronic and thermoelectric properties of double perovskite halides Li2CuInY6 (Y = Cl, Br, I) for energy conversion applications","authors":"N. Ahmad Noor, F. Nasrullah, H. Elansary, S. Mumtaz","doi":"10.15251/jor.2024.203.333","DOIUrl":"https://doi.org/10.15251/jor.2024.203.333","url":null,"abstract":"Recently, double perovskite halides (DPHs) become crucial due to their potential applications in optoelectronic devices due to their stability, non-toxicity, superior oxidation resistance, high conversion efficiency, and high temperature stability. In the current study, we explored DPHs Li2CuInY6 (Y = Cl, Br, I) employing Wien2k package to analyze the structural stability, optoelectronic and thermoelectric features. The formation energy and Born stability criteria are computed to confirm thermodynamic and structural stability. Studied DPHs have direct bandgaps nature investigated by modified Becke and Johnson (mBJ) potential. Calculated values of bandgap decreases, when replace halide ion from Cl to I, indicate tuning from visible to infrared (IR) region of electromagnetic spectrum. Their band edge tuning across the visible to infrared border is reliant on replacement, which makes them suitable for projects involving opto-electronic devices. Further, optical features are investigated in terms of incident photon energy in order to assess the optical output. Lastly, electronic thermoelectric performance is computed using the figure of merit (ZT) for all DPs. Computed results of direct bandgap and optical behavior show that DP Li2CuInCl6 can be used as photovoltaic devices as compared to DPs Li2CuInBr6 and Li2CuInI6.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":" December","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141127911","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}
引用次数: 0
Investigations on synthesis, growth and characterisations of a NLO material: L-Tryptophanium phosphite (LTP) 对一种 NLO 材料的合成、生长和特性的研究：L-亚磷酸色氨酸（LTP）
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-05-15 DOI: 10.15251/jor.2024.203.325
P. D. H. B. Santhi, R. S. Samuel, R. Raja, A. M. Hidayathullah, S. Janarthanan, P. Suresh
{"title":"Investigations on synthesis, growth and characterisations of a NLO material: L-Tryptophanium phosphite (LTP)","authors":"P. D. H. B. Santhi, R. S. Samuel, R. Raja, A. M. Hidayathullah, S. Janarthanan, P. Suresh","doi":"10.15251/jor.2024.203.325","DOIUrl":"https://doi.org/10.15251/jor.2024.203.325","url":null,"abstract":"The nonlinear optical material L-Tryptophanium phosphite (LTP) was synthesised and grown by the process of slow evaporation solution growth. Characterisations like single crystal XRD, FT-IR, and H1 NMR spectral measurements were done to find the crystal structure and functional groups. The crystal was found to possess good transparency for the whole visible region from the UV-Vis-NIR spectral analysis. The thermal behaviour like stability and breakdown of the crystal were assessed using TG-DTA analyses. The hardness of the crystal was determined using Vickers micro hardness study. The KurtzPerry approach was used to study the nonlinear optical (NLO) characteristics of the crystal. A good value of conversion efficiency in second harmonic generation (SHG) makes the generated crystal suitable for frequency conversion.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":" 6","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141128245","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}
引用次数: 0
Absorber layer improvement and performance analysis of CIGS thin-film solar cell CIGS 薄膜太阳能电池吸收层的改进和性能分析
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-05-15 DOI: 10.15251/jor.2024.203.309
A. Khamis, N. I. M. Rodzi, N. Z. A. Naharuddin
{"title":"Absorber layer improvement and performance analysis of CIGS thin-film solar cell","authors":"A. Khamis, N. I. M. Rodzi, N. Z. A. Naharuddin","doi":"10.15251/jor.2024.203.309","DOIUrl":"https://doi.org/10.15251/jor.2024.203.309","url":null,"abstract":"CIGS has shown significant potential for cost-effective and efficient photovoltaic applications, with efficiency often exceeding 20%. However, further improvements in cell performance are needed to reduce production costs. Thus, this study proposes an ultra-thin structure for CIGS solar cells by modifying the absorber layer thickness and composition. SCAPS software was used to evaluate the performance of the proposed design, such as open-circuit voltage (Voc), short-circuit current (Jsc), fill factor (FF%), and conversion efficiency (ŋ%). Results showed that ultra-thin solar cells with the proposed GnP and CGS absorber layers are ideal due to their greater ŋ%, 25.33%.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":" 4","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141128191","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}
引用次数: 0
Surface parametric influences on the photocatalytic behaviour of zinc oxide nanoparticles 表面参数对纳米氧化锌光催化行为的影响
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-03-01 DOI: 10.15251/jor.2024.201.115
R. Jagadeeswari, G. Rathika, K. V. Satheesh Kumar, P. Selvakumar
{"title":"Surface parametric influences on the photocatalytic behaviour of zinc oxide nanoparticles","authors":"R. Jagadeeswari, G. Rathika, K. V. Satheesh Kumar, P. Selvakumar","doi":"10.15251/jor.2024.201.115","DOIUrl":"https://doi.org/10.15251/jor.2024.201.115","url":null,"abstract":"Zinc oxide nanoparticles were chemically synthesised and characterised by UV-DRS spectroscopy, FTIR, scanning electron microscopy with energy-dispersive X-ray diffraction, and X-ray powder diffraction. In order to evaluate the impact of the synthesis process on the structural parameters, Rietveld refinement was done using the GSAS-II programme on experimentally acquired XRD data. ZnO was found to have a hexagonal structure with lattice parameters of a = b =3.247 Å; c = 5.205Å and an average size of about 20-40 nm, as determined by Rietveld refinement of XRD and SEM data. FTIR and EDX analysis was used to confirm the functional group and elemental composition of ZnO NPs. The UV-DRS spectra revealed that the synthesised ZnO had an optical band gap of 3.05 eV. Parametric investigations of the surface morphology of ZnO nanostructures were conducted using the Gwyddion programme. Pseudo-first-order rate kinetics were observed for the photodegradation of two cationic dyes, MB (87.87%) and RhB (74.79%), in the presence of UV light.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"15 9","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140269120","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}
引用次数: 0
Sr0.99Zr(PO4)2:0.01Eu3+ ceramic glass for photoluminescence applications 用于光致发光应用的 Sr0.99Zr(PO4)2:0.01Eu3+ 陶瓷玻璃
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-03-01 DOI: 10.15251/jor.2024.202.155
N. Thiruveni, R. Mathammal
{"title":"Sr0.99Zr(PO4)2:0.01Eu3+ ceramic glass for photoluminescence applications","authors":"N. Thiruveni, R. Mathammal","doi":"10.15251/jor.2024.202.155","DOIUrl":"https://doi.org/10.15251/jor.2024.202.155","url":null,"abstract":"This paper reports the first-time synthesis of Sr0.99Zr(PO4)2:0.01Eu3+ nanophosphor via solution combustion method using glycine as fuel at a fuel-to-oxidizer ratio of 1:1. The PXRD pattern confirmed the formation of the desired phase, while the Scherrer calculation revealed an average particle size of approximately 60 nm. Scanning electron microscopy (SEM) further corroborated the particle size, estimating it around 75 nm. The material exhibited a characteristic mesoporous structure, a hallmark of the solution combustion synthesis technique. Photoluminescence (PL) spectroscopy revealed two intense emission peaks at 590 nm and 615 nm, attributed to Eu3+ ions, suggesting potential applications in LED technology. CIE coordinates indicated emission close to the white region defined by the NTSC standard","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"117 ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140272356","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}
引用次数: 0
Structural and magnetic characterizations of Co substituted Ni-Cu-Zn nanoferrites 钴取代镍铜锌纳米铁氧体的结构和磁性特征
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-03-01 DOI: 10.15251/jor.2024.202.125
Ch. Sianglam, L. R. Singh, B. Thangjam
{"title":"Structural and magnetic characterizations of Co substituted Ni-Cu-Zn nanoferrites","authors":"Ch. Sianglam, L. R. Singh, B. Thangjam","doi":"10.15251/jor.2024.202.125","DOIUrl":"https://doi.org/10.15251/jor.2024.202.125","url":null,"abstract":"Co substituted Ni-Cu-Zn nanoferrites with the compositional formula Cox Ni0.5−x Cu0.3 Zn0.2 Fe2O4 (where x=0.0, 0.1, 0.2) were synthesized by Citrate Precursor method. The as prepared samples were calcined at 950o C for 30 min using a conventional muffle furnace. Characterizations were carried out using XRD, FESEM and VSM techniques.XRD peaks conform to spinel type structure. FESEM micrographs showed surface morphology. Magnetic characterizations were carried out by employing VSM technique. This paper investigates the synthesized samples as potential electronic materials for Multilayer Chip Inductor (MLCI).","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"66 23","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140280816","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}
引用次数: 0
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