Journal of metals, materials and minerals最新文献

Photocatalytic degradation of ciprofloxacin drug utilizing novel PVDF/polyaniline/ lanthanum strontium manganate@Ag composites 利用新型 PVDF/聚苯胺/锰酸镧锶@银复合材料光催化降解环丙沙星药物

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Journal of metals, materials and minerals Pub Date : 2023-12-19 DOI: 10.55713/jmmm.v34i1.1896

S. A. Behera, Ali Amanat, P. Ganga, Raju Achary

{"title":"Photocatalytic degradation of ciprofloxacin drug utilizing novel PVDF/polyaniline/ lanthanum strontium manganate@Ag composites","authors":"S. A. Behera, Ali Amanat, P. Ganga, Raju Achary","doi":"10.55713/jmmm.v34i1.1896","DOIUrl":"https://doi.org/10.55713/jmmm.v34i1.1896","url":null,"abstract":"Poly (vinylidene fluoride) (PVDF) is the first-choice ferroelectric support or membrane material. The lanthanum strontium manganite (LSMO) is a well-known electrode material in the class of the solid oxide fuel cell (SOFC) materials. A set of four polymer composites PVDF-LSMO-PANI(5.0 wt%) with different amount of silver doping were fabricated with the silver nitrate and reducing agent. The characterization of these four novel PVDF based composites were characterized by the XRD, FTIR, SEM, UV-Visible DRS. The present communication highlights: (I) the effect of PANI in the PVDF-LSMO-PANI (PLP) composites towards the photocatalytic degradation of ciprofloxacin drug. (II) the effect of Ag doping in the Ag-PVDF-LSMO-PANI (Ag-PLP) composites towards the photocatalytic degradation of ciprofloxacin drug. It is observed that the incorporation of PANI in PVDF-LSMO and Ag in PVDF-LSMO-PANI polymer ceramic composites showed enhanced photocatalytic degradation of ciprofloxacin in the irradiation of visible radiation. The plausible separation of photo-generated e- hole pairs (e- and h+) carried on by charge migration kind of mechanism is being studied here to understand the improved photocatalytic activity of Ag-PVDF-LSMO-PANI composites.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":" 5","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138959847","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

Dispersion mechanism of nanoparticles and its role on mechanical, thermal and electrical properties of epoxy nanocomposites - A Review 纳米颗粒的分散机理及其对环氧纳米复合材料机械、热和电性能的影响 - 综述

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Journal of metals, materials and minerals Pub Date : 2023-12-19 DOI: 10.55713/jmmm.v33i4.1774

Baljit Singh, A. Mohanty, Amit Kumar Srivastava, Ajay Singh

引用次数: 0

Sustainable innovation in ballistic vest design: Exploration of polyurethane-coated hemp fabrics and reinforced sandwich epoxy composites against 9 mm and .40 S&W bullets 防弹背心设计的可持续创新：聚氨酯涂层麻织物和增强型夹层环氧树脂复合材料对抗 9 毫米和 .40 S&W 子弹的研究

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Journal of metals, materials and minerals Pub Date : 2023-12-15 DOI: 10.55713/jmmm.v33i4.1830

Tannachart Wantang, Manop Pipathattakul, F. Wiwatwongwana

{"title":"Sustainable innovation in ballistic vest design: Exploration of polyurethane-coated hemp fabrics and reinforced sandwich epoxy composites against 9 mm and .40 S&W bullets","authors":"Tannachart Wantang, Manop Pipathattakul, F. Wiwatwongwana","doi":"10.55713/jmmm.v33i4.1830","DOIUrl":"https://doi.org/10.55713/jmmm.v33i4.1830","url":null,"abstract":"This research aimed to evaluate the bulletproof capabilities of hemp fabrics and optimize the design factors for effective ballistic vests. Three main aspects were investigated: enhancing toughness with polyurethane-coated hemp fabrics, determining optimal placement of fabric-reinforced hemp epoxy composites in various configurations, and identifying the optimal number of fabric layers for performance against 9 mm and .40 S&W bullets. Penetration depth was measured in ballistic gelatin to analyze the results. The study showed strong statistical correlations between factor variables and penetration depth shifts. The most effective strategies included polyurethane-coated hemp on all layers and increased layering. The ammunition of 9 mm bullets exhibited the least penetration depth when tested against the sandwich-reinforced configuration. In contrast, the larger .40 S&W bullets demonstrated that the frontal arrangement yielded the minimum penetration depth. Notably, 9 mm bullets penetrated 1.25 times deeper than .40 S&W bullets. These findings emphasize hemp fabric's potential for reliable ballistic vests. Utilizing polyurethane-coated hemp fabric in epoxy composites within a sandwich reinforcement of at least 212 layers is recommended to stop 9 mm bullets effectively. The research contributes valuable insights to sustainable ballistic vest development, utilizing natural materials with exceptional bullet protection capabilities.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"17 35","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138970664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Electrical and water resistance properties of conductive paste based on gold/silver composites 基于金/银复合材料的导电浆料的导电性和耐水性能

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Journal of metals, materials and minerals Pub Date : 2023-12-13 DOI: 10.55713/jmmm.v33i4.1786

S. Wongrerkdee, S. Choopun, P. Pimpang

{"title":"Electrical and water resistance properties of conductive paste based on gold/silver composites","authors":"S. Wongrerkdee, S. Choopun, P. Pimpang","doi":"10.55713/jmmm.v33i4.1786","DOIUrl":"https://doi.org/10.55713/jmmm.v33i4.1786","url":null,"abstract":"This study aimed to investigate the effects of a corrosive environment on both the electrical and the water resistance properties of conductive paste based on gold/silver composites. The conductive paste was prepared by incorporating silver and gold powders, polyvinyl acetate, polyvinyl chloride as adhesive components, and methyl isobutyl ketone as a diluent. The gold/silver composite powder was prepared with different mass ratios of gold and silver. The paste was coated on a substrate and heated at 80℃ to form the conductive paste film. Characterizations of conductive paste were performed by using FT-IR spectroscopy, electrometry, cyclic voltammetry, and contact angle measurements. Thus, the conductive paste films were tested under two conditions: the absence and the presence of exposure to nitric acid vapor. The results showed that the resistance and the contact angle of the conductive paste were more stable after exposure to nitric acid vapor, particularly in samples of higher gold content. Furthermore, the electrochemical behavior of the conductive paste with gold content remains unchanged after exposure to nitric acid vapor. Results suggest that gold has properties in terms of stability, resistance to oxidation, and maintaining surface characteristics, making it a preferable component for applications requiring resistance to corrosive environments.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"2 6","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138976437","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

Synthesis of carbon nanowalls by oxy-acetylene torch method 用氧-乙炔炬法合成碳纳米壁

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Journal of metals, materials and minerals Pub Date : 2023-12-13 DOI: 10.55713/jmmm.v33i4.1806

B. Zhumadilov, A. Kenzhegulov, Renata Nemkayeva, G. Partizan, Ye. Yerlanuly, Maratbek Gadbullin

引用次数: 0

Review of materials, functional components, fabrication technologies and assembling characteristics for polymer electrolyte membrane fuel cells (PEMFCs) – An update 聚合物电解质膜燃料电池（PEMFC）的材料、功能组件、制造技术和组装特性回顾 - 最新情况

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Journal of metals, materials and minerals Pub Date : 2023-12-13 DOI: 10.55713/jmmm.v33i4.1775

Arun Daya, Arputharaj SAMSON NESARAJ

{"title":"Review of materials, functional components, fabrication technologies and assembling characteristics for polymer electrolyte membrane fuel cells (PEMFCs) – An update","authors":"Arun Daya, Arputharaj SAMSON NESARAJ","doi":"10.55713/jmmm.v33i4.1775","DOIUrl":"https://doi.org/10.55713/jmmm.v33i4.1775","url":null,"abstract":"Fuel cells use electrochemical processes to transform the chemical energy of a fuel into electrical energy, which is a key enabler for the shift to an H2-based economy. Because of their high energy conversion efficiency and low pollution emissions, fuel cells with polymer electrolyte membranes (PEMFCs) are regarded as being in frontline of commercialization for the transportation and automotive industries. However, there are two major hurdles to their future commercialization: cost and durability, which promote basic study and development of their components. In this article, we reviewed the materials, functional components, fabrication technologies and assembling characteristics related to PEMFCs. Platinum's significance as a catalyst in PEMFC applications stems from the fact that it beats all other catalysts in three critical parts: stability, selectivity, and activity. In order to create Pt rich surfaces of NPs, Pt metal is alloyed with d-block metals like Cu, Ni, Fe, and Co. PEMFC development is inextricably tied to the benefits and drawbacks of the Nafion membrane under various operating circumstances. Nafion membrane has some drawbacks, including poor performance at high temperatures (over 90℃), low conductivity under low humidification, and high cost. As a result, a variety of nanoscale additives are frequently added to Nafion nanocomposites to enhance the material's properties under fuel cell working conditions. Fiber composite based bipolar plates can deliver best performance. The assembly of PEMFC based on strap approach is being explored. The applications of PEMFC are also projected.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"135 34","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139004044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Growth of proton conducting strontium cerate composites 质子传导锶酸盐复合材料的生长

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Journal of metals, materials and minerals Pub Date : 2023-12-12 DOI: 10.55713/jmmm.v33i4.1752

C. K. Shilpa, S. Jasira, V. P. Veena, K. M. Nissamudeen

{"title":"Growth of proton conducting strontium cerate composites","authors":"C. K. Shilpa, S. Jasira, V. P. Veena, K. M. Nissamudeen","doi":"10.55713/jmmm.v33i4.1752","DOIUrl":"https://doi.org/10.55713/jmmm.v33i4.1752","url":null,"abstract":"The increased population and modern way of life have greatly depleted the effectiveness of traditional energy production methods. There is a strong demand for environmentally friendly and renewable alternatives to replace the old systems. Sustainable energy production systems have emerged as a vital replacement for the conventional use of fossil fuels. Among these, solid oxide fuel cells (SOFCs) play a significant role. Recently, researchers have developed electrolyte components for SOFCs using proton-conducting perovskites with excellent conductivity. This critical assessment presents a yearly overview of innovative strategies for utilizing doped strontium cerate perovskites in energy production systems, a novel approach. The importance of identifying dopants that can enhance conductivity and stability in strontium cerate composites is emphasized, creating a crucial element for high-performance energy systems. Through a comparative study, it's been found that rare earth elements with smaller ionic radii, such as thulium-doped strontium cerium zirconate in an additional composite form, can outperform the traditionally used ytterbium-doped strontium cerate composites in proton-conducting applications.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"10 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139009800","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

Structure and chemical durability improvement of alkali silicate glass by zirconium dioxide and erbium oxide addition 通过添加二氧化锆和氧化铒改善碱硅酸盐玻璃的结构和化学耐久性

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Journal of metals, materials and minerals Pub Date : 2023-12-06 DOI: 10.55713/jmmm.v33i4.1624

Ativit Denprawat, Kittipong Sinwanasarp, P. Kidkhunthod, N. Laorodphan, W. Thiemsorn

{"title":"Structure and chemical durability improvement of alkali silicate glass by zirconium dioxide and erbium oxide addition","authors":"Ativit Denprawat, Kittipong Sinwanasarp, P. Kidkhunthod, N. Laorodphan, W. Thiemsorn","doi":"10.55713/jmmm.v33i4.1624","DOIUrl":"https://doi.org/10.55713/jmmm.v33i4.1624","url":null,"abstract":"Glass structure tailoring of alkali silicate glasses by addition of ZrO2 and Er2O3 is found to enhance the chemical durability of glasses. ZrO2 (x ranged between 5 mol% to 15 mol%) and Er2O3 (y ranged between 0.5 mol% to 1.5 mol%) were used to replace SiO2 and Na2O, respectively, in the glasses with the nominal composition of 10Li2O-(15-y)Na2O-10CaO-(65-x)SiO2-xZrO2-y Er2O3. The samples were prepared by conventional melt quenching technique. The structures of produced glasses were examined by X-ray absorption spectroscopy (XAS) and Raman spectroscopy. XAS spectra demonstrated that the oxidation numbers of Zr and Er ions were +4 and +3, respectively. The chemical environment around both cations was six-fold coordination. In addition, Raman spectra demonstrated that the Zr4+ ions formed the Q4(Zr) structure, which caused the reduction of non-bridging oxygen. In case of the Er3+ ions, the formation of the Si-O-Er bonds was explained from the Raman study. The chemical durability of glass was determined from Na+ ions leaching values. In pH 7 solution, the leached Na+ ions reduced from 25.67% to 21.43% and from 22.50% to 20.49% as a function of concentration of ZrO2 (x = 5 mol% to 15 mol%) and Er2O3 (y = 0.5 mol% to 1.5 mol%), respectively. As the results, the chemical durability of the ZrO2-containing and Er2O3-containing glasses were significantly improved due to charge compensated mechanism and enhancing network rigidity by increasing cation field strength. Moreover, the micro-hardness (580 HV to 837 HV) and density (2.54 g⸳cm-3 to 2.82 g⸳cm-3) also displayed an increased tendency with larger concentration of ZrO2 and Er2O3.\u0000 ","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"13 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138597107","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

Molybdenum disulfide-Zirconium dioxide composite with enhance supercapacitance performance 具有更强超级电容性能的二硫化钼-二氧化锆复合材料

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Journal of metals, materials and minerals Pub Date : 2023-12-06 DOI: 10.55713/jmmm.v33i4.1791

Razan NADHIM SHAKER, Sami Mohammed, Y.A. Abdulsayed

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Effect of calcination frequency on the thermoelectric properties of Ti doped CuCrO2 by solid state method 固态法煅烧频率对掺钛 CuCrO2 热电性能的影响

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Journal of metals, materials and minerals Pub Date : 2023-12-02 DOI: 10.55713/jmmm.v33i4.1785

D. Bonardo, N. Darsono, S. Humaidi, A. Imaduddin, Noni Surtiana Silalahi

{"title":"Effect of calcination frequency on the thermoelectric properties of Ti doped CuCrO2 by solid state method","authors":"D. Bonardo, N. Darsono, S. Humaidi, A. Imaduddin, Noni Surtiana Silalahi","doi":"10.55713/jmmm.v33i4.1785","DOIUrl":"https://doi.org/10.55713/jmmm.v33i4.1785","url":null,"abstract":"In this study, the influence of titanium oxide (TiO2) dopants and varying calcination processes on the thermoelectric properties of CuCrO2 was systematically explored. It was emphasized that these factors were not only affecting dislocation density but also exerting a profound influence on thermoelectric performance through the modulation of Seebeck coefficient and resistivity. The findings highlighted CrT-2, which incorporated TiO2 and underwent a two-time calcination process, as the top-performing sample in terms of power factor values, underscoring the significance of TiO2 as a dopant for enhancing thermoelectric efficiency. Conversely, Cr-4, exposed to four calcination cycles, exhibited slightly lower power factor values compared to Cr-2. Notably, CrT-4, despite containing the titanium dopant, showed the lowest power factor values, potentially due to intricate interactions between the dopant and the extended calcination process. These results underscore the intricate interplay between dopants, calcination processes, and thermoelectric performance in CuCrO2, necessitating precise optimization to achieve the desired material efficiency.","PeriodicalId":16459,"journal":{"name":"Journal of metals, materials and minerals","volume":"110 15","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138607724","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