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Effect of annealing temperature on the physical of nanostructured TiO2 films prepared by sol-gel method 退火温度对溶胶-凝胶法制备的纳米结构 TiO2 薄膜物理特性的影响
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-03-01 DOI: 10.15251/jor.2024.202.131
A. A. Abdul Razaq, F. H. Jasim, S. S. Chiad, F. A. Jasim, Z. S. A. Mosa, Y. H. Kadhim
{"title":"Effect of annealing temperature on the physical of nanostructured TiO2 films prepared by sol-gel method","authors":"A. A. Abdul Razaq, F. H. Jasim, S. S. Chiad, F. A. Jasim, Z. S. A. Mosa, Y. H. Kadhim","doi":"10.15251/jor.2024.202.131","DOIUrl":"https://doi.org/10.15251/jor.2024.202.131","url":null,"abstract":"This study uses glass substrates to create nanostructured TiO2 thin films employing SolGel method. Afterwards, TiO2 films are annealed in air for two hours at (400, 450, and 500) °C. The XRD tests demonstrate that all films are tetragonal polycrystalline and have orientations equal to those described in the literature. These findings suggest that when the annealing temperature rises, grain size increases. As the annealing temperature is raised, the Full Width at Half Maximum (FWHM) reduces from 0.57° to 0.0.51°, and the dislocation density drops from 45.22 to 39.22.18 nm, respectively. AFM has examined the thin films' surface morphology. The films formed using this method have good crystalline and homogenous surfaces, according to AFM tests. With an increase in annealing temperature, thin films' average particle size, average roughness, and Root Mean Square (RMS) value all drop. The films' optical characteristics. The transmission was over 97% decreased with increasing annealing temperatures. It is found that the band gap decreases from 3.42 to 3.3 eV with increasing annealing temperature. Between 300 and 900 nm, the films' refractive indices range from 2.89 to 2.2.76. With higher annealing temperatures, the films' extinction coefficients fall.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"202 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140270888","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
Synthesis and Exploring structural, magnetic, morphology and optical properties of La2−xAlxCuO4 (0 ≤ x ≤ 0.25) perovskite nanoparticles by microwave-assisted combustion method 微波辅助燃烧法合成 La2-xAlxCuO4 (0 ≤ x ≤ 0.25) 包晶纳米粒子并探索其结构、磁性、形貌和光学特性
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-03-01 DOI: 10.15251/jor.2024.202.143
S. Yuvaraj, P. Aji Udhaya, S. Deepa, M. Sundararajan, R. Jothiramalingam, H. Al-Lohedan, H. Al-Sigh, A. A. Nazeer
{"title":"Synthesis and Exploring structural, magnetic, morphology and optical properties of La2−xAlxCuO4 (0 ≤ x ≤ 0.25) perovskite nanoparticles by microwave-assisted combustion method","authors":"S. Yuvaraj, P. Aji Udhaya, S. Deepa, M. Sundararajan, R. Jothiramalingam, H. Al-Lohedan, H. Al-Sigh, A. A. Nazeer","doi":"10.15251/jor.2024.202.143","DOIUrl":"https://doi.org/10.15251/jor.2024.202.143","url":null,"abstract":"La2CuO4 perovskite nanoparticles doped with aluminum were synthesized through the microwave-assisted combustion technique. Comprehensive studies on the structural, magnetic optical, functional and morphological properties were conducted using various techniques, including XRD, EDX, VSM, DRS-UV, FT-IR and FESEM respectively, .The XRD patterns of pristine La2CuO4 and Al-doped La2CuO4 unequivocally validated the exclusive development of a perovskite structure, devoid of any impurities. Nevertheless, the augmentation in Al3+ content (x = 0–0.25) induced a noteworthy phase shift from orthorhombic to cubic configuration. The average crystallite dimensions spanned from 54 to 41 nm. Distinct FT-IR bands at approximately 687 and 434 cm-1 were intricately linked to the La-O and Cu-O stretching modes inherent to the orthorhombic La2CuO4 phase. The energy gap determined through the Kubelka–Munk (K–M) methodology, experienced an elevation concomitant with the heightened Al3+ content (1.67–1.72 eV), attributable to quantum confinement phenomena. Within the La2-xAlxCuO4 (x = 0 to 0.25) system, the genesis of nanoscaled crystallized grains, interspersed with pores resulting from the amalgamation of grains, was evident. Analysis of hysteresis curves unveiled the emergence of soft ferromagnetic behavior at ambient temperature.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"165 ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140274554","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
Adsorption kinetics behavior of MB dye on CaO nanosheets MB 染料在 CaO 纳米片上的吸附动力学行为
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-02-01 DOI: 10.15251/jor.2024.201.93
A. Modwi, M. A. Aissa, A. Alakhras, H. Idriss
{"title":"Adsorption kinetics behavior of MB dye on CaO nanosheets","authors":"A. Modwi, M. A. Aissa, A. Alakhras, H. Idriss","doi":"10.15251/jor.2024.201.93","DOIUrl":"https://doi.org/10.15251/jor.2024.201.93","url":null,"abstract":"The work reported herein demonstrates the fabrication of CaO nanosheets employing a thermal decomposition method. The obtained CaO nanosheets were characterized using TEM, BET, XRD, EDX, and FTIR instruments. Moreover, the effect of initial dye concentration and pH on MB removal by CaO nanosheets was studied. The result showed that the nanoparticles have sizes around 100 nm, and the CaO nanosheets have an average diameter of 50 nm. Meanwhile, the average pore diameter and surface area of CaO are 15.847 Å and 5.881 m2. g−1 , respectively. Numerical models based on Temkin, Freundlich, and Langmuir were applied to adsorption data to better understand the MB dye adsorption onto CaO nanoparticles. The sorption findings demonstrated a stronger fit with the Temkin model (R2 = 0.983) compared to the Freundlich model (R2 = 0.947) and Langmuir model (R2 = 0.968). The maximum adsorption capacity of MB on the CaO nanoparticles is 688.01 mg/g. The investigation determined that the adsorption kinetics adhered to the Pseudo-second-order kinetic model(R2 =0.982).","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"324 5","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139877114","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
Enhanced photovoltaic performance of dye sensitized solar cell based on nanocomposites of zinc oxide photoanode 基于氧化锌光阳极纳米复合材料的染料敏化太阳能电池光电性能的增强
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-02-01 DOI: 10.15251/jor.2024.201.85
A. V. Balan, P. Gopinath, V. Radhika
{"title":"Enhanced photovoltaic performance of dye sensitized solar cell based on nanocomposites of zinc oxide photoanode","authors":"A. V. Balan, P. Gopinath, V. Radhika","doi":"10.15251/jor.2024.201.85","DOIUrl":"https://doi.org/10.15251/jor.2024.201.85","url":null,"abstract":"XRD and SEM images of ZnO nanoparticles prepared by the precipitation method allow investigation of their morphology and morphological refinement. No contamination was observed in the XRD spectrum and SEM confirmed that the nanoparticles were wellcoordinated ZnO at 30 nm size. UV-Vis spectroscopy was used to tune the optical properties and they appeared not to be fixed at 3.34 eV. The band gap of semiconductor materials makes them competitive for solar cell applications. The O-rich stoichiometry measured by XPS may be a direct result of zinc deficiency. Therefore, ZnO nanoparticles were prepared to fabricate secretory solar cells (DSSCs). From the perspective of J-V, open circuit voltage (Voc), barrier thickness (Jsc), fill factor (FF) and efficiency (η) were not chosen as much as possible and the quality was calculated as 0.65V, 6.26mA. , 62.2% and 1.96% respectively at 100mW/cm2 .","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"8 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139887467","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
Adsorption kinetics behavior of MB dye on CaO nanosheets MB 染料在 CaO 纳米片上的吸附动力学行为
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-02-01 DOI: 10.15251/jor.2024.201.93
A. Modwi, M. A. Aissa, A. Alakhras, H. Idriss
{"title":"Adsorption kinetics behavior of MB dye on CaO nanosheets","authors":"A. Modwi, M. A. Aissa, A. Alakhras, H. Idriss","doi":"10.15251/jor.2024.201.93","DOIUrl":"https://doi.org/10.15251/jor.2024.201.93","url":null,"abstract":"The work reported herein demonstrates the fabrication of CaO nanosheets employing a thermal decomposition method. The obtained CaO nanosheets were characterized using TEM, BET, XRD, EDX, and FTIR instruments. Moreover, the effect of initial dye concentration and pH on MB removal by CaO nanosheets was studied. The result showed that the nanoparticles have sizes around 100 nm, and the CaO nanosheets have an average diameter of 50 nm. Meanwhile, the average pore diameter and surface area of CaO are 15.847 Å and 5.881 m2. g−1 , respectively. Numerical models based on Temkin, Freundlich, and Langmuir were applied to adsorption data to better understand the MB dye adsorption onto CaO nanoparticles. The sorption findings demonstrated a stronger fit with the Temkin model (R2 = 0.983) compared to the Freundlich model (R2 = 0.947) and Langmuir model (R2 = 0.968). The maximum adsorption capacity of MB on the CaO nanoparticles is 688.01 mg/g. The investigation determined that the adsorption kinetics adhered to the Pseudo-second-order kinetic model(R2 =0.982).","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"19 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139817129","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
Enhanced photocatalytic degradation of pure and Cu-doped ZnO nanoparticles prepared under Co-precipitation method 共沉淀法制备的纯 ZnO 纳米粒子和掺铜 ZnO 纳米粒子的光催化降解能力增强
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-02-01 DOI: 10.15251/jor.2024.201.103
V. Balasubramanian, R. Jeyachitra, T. S. Senthil, S. Kalpana
{"title":"Enhanced photocatalytic degradation of pure and Cu-doped ZnO nanoparticles prepared under Co-precipitation method","authors":"V. Balasubramanian, R. Jeyachitra, T. S. Senthil, S. Kalpana","doi":"10.15251/jor.2024.201.103","DOIUrl":"https://doi.org/10.15251/jor.2024.201.103","url":null,"abstract":"The key goal of this study is to innovate the pure and 0.05, 0.10 and 0.15 wt.% of Cudoped ZnO NPs through co-precipitation technique. PXRD pattern shows the hexagonal crystal structure with no any phase impurity were observed for all the synthesized samples. From UV-Vis DRS spectra, band gap was obtained as 3.18, 3.24, 3.29 and 3.33 eV respectively for undoped, Cu-doped ZnO NPs (0.05, 0.10 and 0.15 wt.%). From SEM analysis, the agglomeration of rod-like morphology for pure ZnO NPs, spherical-like morphology for Cu-doped ZnO NPs (0.05 wt.%) and flake-like morphology for Cu-doped ZnO NPs (0.10 wt.%) and flower-like morphology for Cu-doped ZnO NPs (0.15 wt.%). The photocatalytic performance of the synthesized NPs was studied by the dye degradation of Methylene Blue (MB) under UV irradiation. The result exposed that, 0.15 wt.% of Cu-doped ZnO NPs is found to have efficient degradation candidate materials.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"84 2","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139877041","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
Enhanced photovoltaic performance of dye sensitized solar cell based on nanocomposites of zinc oxide photoanode 基于氧化锌光阳极纳米复合材料的染料敏化太阳能电池光电性能的增强
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2024-02-01 DOI: 10.15251/jor.2024.201.85
A. V. Balan, P. Gopinath, V. Radhika
{"title":"Enhanced photovoltaic performance of dye sensitized solar cell based on nanocomposites of zinc oxide photoanode","authors":"A. V. Balan, P. Gopinath, V. Radhika","doi":"10.15251/jor.2024.201.85","DOIUrl":"https://doi.org/10.15251/jor.2024.201.85","url":null,"abstract":"XRD and SEM images of ZnO nanoparticles prepared by the precipitation method allow investigation of their morphology and morphological refinement. No contamination was observed in the XRD spectrum and SEM confirmed that the nanoparticles were wellcoordinated ZnO at 30 nm size. UV-Vis spectroscopy was used to tune the optical properties and they appeared not to be fixed at 3.34 eV. The band gap of semiconductor materials makes them competitive for solar cell applications. The O-rich stoichiometry measured by XPS may be a direct result of zinc deficiency. Therefore, ZnO nanoparticles were prepared to fabricate secretory solar cells (DSSCs). From the perspective of J-V, open circuit voltage (Voc), barrier thickness (Jsc), fill factor (FF) and efficiency (η) were not chosen as much as possible and the quality was calculated as 0.65V, 6.26mA. , 62.2% and 1.96% respectively at 100mW/cm2 .","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"26 6","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139827647","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
Ionic transport study in [NaNO3]100-x:[Sr(NO3)2]x mixed solid electrolyte system NaNO3]100-x:[Sr(NO3)2]x 混合固体电解质体系中的离子迁移研究
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2023-11-01 DOI: 10.15251/jor.2023.196.643
T.V. Kumar, K. P. Kumar, G. Prathibha, N.H Kumar, B. H. C. Rao
{"title":"Ionic transport study in [NaNO3]100-x:[Sr(NO3)2]x mixed solid electrolyte system","authors":"T.V. Kumar, K. P. Kumar, G. Prathibha, N.H Kumar, B. H. C. Rao","doi":"10.15251/jor.2023.196.643","DOIUrl":"https://doi.org/10.15251/jor.2023.196.643","url":null,"abstract":"Na+ ion-conducting solid electrolyte of sodium nitrate (NaNO3) and Sr(NO3)2 mixed crystals were grown by slow evaporation technique. XRD, FTIR, SEM characterizations and AC, DC conductivities were carried out on the pellets. Conductivity in these mixed solid electrolytes was noticed to increase with increase in m/o Sr(NO3)2 upto 14.68 followed by decrease. The conductivity in 14.68 m/o Sr(NO3)2 is more than one order of magnitude as compared to NaNO3 in the extrinsic region. Ionic transport in these mixed systems is explained.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"33 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139303288","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
Efficiency enhancement in SiGe thin film solar cell by a CNT grating structure 利用 CNT 光栅结构提高 SiGe 薄膜太阳能电池的效率
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2023-11-01 DOI: 10.15251/jor.2023.196.631
H. H. Madani, M. R. Shayesteh, M. R. Moslemi
{"title":"Efficiency enhancement in SiGe thin film solar cell by a CNT grating structure","authors":"H. H. Madani, M. R. Shayesteh, M. R. Moslemi","doi":"10.15251/jor.2023.196.631","DOIUrl":"https://doi.org/10.15251/jor.2023.196.631","url":null,"abstract":"In this paper, a new structure of SiGe thin film solar cell using a carbon nanotubes (CNT) grating layer is proposed. CNT grating layer is used which reduces the reflection loss from the surface and maximizing optical absorption in the active layer of the cell. In order to reduce the carrier recombination in the back contact, a GaAs back-surface field (BSF) layer was used. The simulation results show that the efficiency of the proposed structure is 29.32%. Furthermore, we were able to increase the efficiency to 31.3% by optimizing the structural parameters including the depth and number of grating periods.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"40 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139304954","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
A study of the efficient approach to introduce two Na ions into a NaVOPO4 matrix and an analysis of the electrochemical performance of NaVOPO4/Na2V(PO4)2 研究将两个 Na 离子引入 NaVOPO4 基质的有效方法，并分析 NaVOPO4/Na2V(PO4)2 的电化学性能
IF 1 4区 材料科学
Journal of Ovonic Research Pub Date : 2023-11-01 DOI: 10.15251/jor.2023.196.673
A. Neelaveni, N. Sivakumar
{"title":"A study of the efficient approach to introduce two Na ions into a NaVOPO4 matrix and an analysis of the electrochemical performance of NaVOPO4/Na2V(PO4)2","authors":"A. Neelaveni, N. Sivakumar","doi":"10.15251/jor.2023.196.673","DOIUrl":"https://doi.org/10.15251/jor.2023.196.673","url":null,"abstract":"In this work, we manufacture NaVOPO4 with the addition of one additional Na ion to enhance the stability and electrochemical formulation utilizing three ways, including sol gel-assisted hydrothermal, pure sol-gel, and solid state reaction methods. The sol-gel aided hydrothermal approach is the most effective way to add more Na ions to the NaVOPO4 matrix out of the three. Due to the presence of carbon content in high temperatures, the alterations of oxygen environment (O (1 &2) sites around the Na and V cause NaVOPO4/ Na2V(PO4)2 (NVP). The traces with high intensity at 17.99o indicates the tetragonal phase of Na2V(PO4)2 in NaVOPO4 and it is concreted by Raman analysis by peak shifting from 884 to 866 cm–1 . The character in Na2V(PO4)2 influences the Na ion intercalation process and yields the specific capacity in a three-electrode system is 0.83mAh/g at the scan rate of 10mV/s.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":"47 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139296119","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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