Materials Science Forum最新文献_第9页

Recovery of Silica from Sidoarjo Mud by Alkali Fusion 用碱熔法从锡多尔乔泥浆中回收二氧化硅

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-mbgw98

S. Juliastuti, Erlinda Ningsih, R. Darmawan, N. Hendrianie, O. Rachmaniah

引用次数: 0

Cermet Powders Based on TiAl Intermetallic for Thermal Spraying 基于钛铝金属间化合物的热喷涂金属陶瓷粉末

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-7ris3b

Oleksii Burlachenko, N. Vigilianska, Cezary Senderowski

引用次数: 0

The Modification of Thermal Conductivity of Phase Change Material Using Nano Metal-Oxide Particles 利用纳米氧化金属颗粒改变相变材料的导热性能

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-w84kyz

Wisanu Phukaokaew, A. Suksri, T. Wongwuttanasatian

{"title":"The Modification of Thermal Conductivity of Phase Change Material Using Nano Metal-Oxide Particles","authors":"Wisanu Phukaokaew, A. Suksri, T. Wongwuttanasatian","doi":"10.4028/p-w84kyz","DOIUrl":"https://doi.org/10.4028/p-w84kyz","url":null,"abstract":"The phase change materials (PCM) based cooling system have gained recent popularity with PV module temperature (TPV) reduction. PCM is an effective thermal energy storage material with the activation of latent heat capacity. Its low heat conductivity has been discovered in several studies. In this study, PCM is chosen to mix with nanoparticles to enhance its thermal conductivity and performance. For an ambient temperature of 38, it is suggested that the melting temperature (Tmelt) of PCM should be between 41 and 44 °C. Nanoparticle composited PCM (nc-PCM) are generated by mixing lauric acid (LA) with three different types of nanoparticles, including aluminum oxide (Al2O3), copper oxide (CuO), and magnesium oxide (MgO) in the following proportions: 100:0, 99:1, 98:2, 94:6, 92:8 and 90:10. It has been shown that the melting points (Tmelt) of the studied nc-PCMs are between 41.18 and 42.47 °C and thermal conductivity increases. According to the findings, the best balance between latent heat of fusion and thermal conductivity should be at 6% nanoparticle. Finally, it is expected that employing these three nc-PCM to reduce the PV module's temperature will enhance PV efficiency.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139773938","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

Size-Dependent Surface Plasmon Resonance of Green Synthesized Gold Nanoparticles Using Mangifera indica Fruit Peel Extract 利用芒果果皮提取物绿色合成金纳米粒子的尺寸依赖性表面等离子共振

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-92udae

Jared Deve P. Delicana, Romnick B. Unabia, Jay C. Dulog, Aldrin Lalem, Noel Lito B. Sayson, R. Capangpangan, A. Lubguban, Arnold A. Alguno

{"title":"Size-Dependent Surface Plasmon Resonance of Green Synthesized Gold Nanoparticles Using Mangifera indica Fruit Peel Extract","authors":"Jared Deve P. Delicana, Romnick B. Unabia, Jay C. Dulog, Aldrin Lalem, Noel Lito B. Sayson, R. Capangpangan, A. Lubguban, Arnold A. Alguno","doi":"10.4028/p-92udae","DOIUrl":"https://doi.org/10.4028/p-92udae","url":null,"abstract":"Gold nanoparticles (AuNPs) have been studied for various applications due to their adjustable surface plasmon resonance (SPR) properties and facile synthesis. AuNP production has predominantly relied on synthetic chemicals to reduce and stabilize gold precursors. There is an increasing demand for environmentally friendly synthesis methods due to ecological concerns. This work introduced a green synthesis approach using Mangifera indica fruit peel extract. Obtained through maceration of dried fruit peels, this extract served as a reducing agent for gold precursors at 80°C. We obtained varying sizes of AuNPs by manipulating the initial concentration of gold ions: 0.1mM, 0.25mM, and 0.5mM. The UV-vis spectroscopy results confirmed the signature SPR peak for AuNPs around 530 nm, with peak shifts highly dependent on the gold ion concentration. The dynamic light scattering (DLS) measurements revealed hydrodynamic diameters of 89.5 nm, 121.5 nm, and 144.5 nm for the various concentrations. The Fourier transform (FTIR) analysis identified the role of inherent phenols and flavonoids in gold precursor reduction. This study emphasizes the potential of Mangifera indica fruit peel extract as a viable alternative for AuNP synthesis. This study could possibly boost the utilization of gold nanoparticles towards applications in biology and medicine as well as environmental remediation.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139775305","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 and Characterization of Hierarchical Structure Au/ZnO Nanocomposites for Possible Photocatalytic Applications 可用于光催化应用的分层结构金/氧化锌纳米复合材料的合成与表征

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-piu3w7

Aldrin Lalem, Jay C. Dulog, Jared Deve P. Delicana, Romnick B. Unabia, Noel Lito B. Sayson, R. Capangpangan, A. Lubguban, Arnold A. Alguno

{"title":"Synthesis and Characterization of Hierarchical Structure Au/ZnO Nanocomposites for Possible Photocatalytic Applications","authors":"Aldrin Lalem, Jay C. Dulog, Jared Deve P. Delicana, Romnick B. Unabia, Noel Lito B. Sayson, R. Capangpangan, A. Lubguban, Arnold A. Alguno","doi":"10.4028/p-piu3w7","DOIUrl":"https://doi.org/10.4028/p-piu3w7","url":null,"abstract":"Semiconductor-metal nanocomposites are actively investigated for their diverse applications in emerging fields such as photocatalysis, photovoltaics, and chemical sensing. In this study, we synthesized ZnO semiconductor nanoparticles using a chemical bath deposition method with ZnSO4·7H2O and controlled NH4OH concentrations, facilitated by an anionic surfactant to enable the attachment of Au metal nanoparticles. Au nanoparticles were prepared from HAuCl4 using citrate as a reducing agent, and metal oxide was rapidly introduced to ensure a well-defined nanocomposite with a fixed 75 w/v% composition. Fast Fourier transform spectroscopy (FTIR) and Ultra-visible (UV-Vis) spectroscopy were used to provide clear evidence of Au/ZnO nanocomposite formation through the presence of distinctive peaks around 359nm and 518nm, with Dynamic Light Scattering (DLS) revealing contrasting average sizes for ZnO and Au, highlighting the significant size difference in the Au/ZnO nanocomposites. Additionally, the scanning electron microscopy – energy dispersive x-ray (SEM-EDS) analysis confirmed the successful presence of ZnO nanoparticles. These findings offer insights into the potential applications and unique properties of Au/ZnO nanocomposites for possible photocatalytic applications.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139776426","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

Electrochemical Characterization of Battery-Supercapacitor Hybrid Based on Li4Ti5O12 and Ti3C2 基于 Li4Ti5O12 和 Ti3C2 的混合电池-超级电容器的电化学特性分析

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-pyqi38

Ziyu He

引用次数: 0

Effect of Crystallization Properties of Continuous Basalt Fibers on Thermal Stability of Composite Materials 连续玄武岩纤维的结晶特性对复合材料热稳定性的影响

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-unbrc9

S. Ivanitskii, Yurii Chuvashov

{"title":"Effect of Crystallization Properties of Continuous Basalt Fibers on Thermal Stability of Composite Materials","authors":"S. Ivanitskii, Yurii Chuvashov","doi":"10.4028/p-unbrc9","DOIUrl":"https://doi.org/10.4028/p-unbrc9","url":null,"abstract":"The thermal stability of composite materials based on basalt fibers is determined by the strength of fibers under thermal stress. The decrease in strength occurs due to the crystallization of the original fibers and the development of microcrystalline nuclei in them during heating. Experimental studies of the influence of the processing temperature of continuous basalt fibers on their strength have been carried out. It has been established that the strength of fibers during their heat treatment up to 400оС decreases by 25 % from the initial one. At the temperature of approximately 500оС, the strength of the fibers is almost half. At 600оС, the fiber strength is 20 % of the initial strength. At a processing temperature of 700оС, the fiber is completely destroyed. The main reasons for the decrease in fiber strength are the development of microcrystalline nuclei that have formed in the fibers at the drawing stage in the crystallization zone. From above, this zone is determined by the temperature of the upper limit of melt crystallization, and from below it is limited by the glass transition temperature. The residence time of the melt in this range is the crystallization time. Calculations the speed of movement and the cooling rate of the melt stream during fiber drawing were carried out, which made it possible to determine the temperature zone and time of crystallization. The results of theoretical studies have shown that for the production of fibers used in composites, it is necessary to select such basalts and conditions for the fiber drawing, under which the values of the temperature zone and time of crystallization will be the smallest.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139774472","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

Size-Dependent Surface Plasmon Resonance of Green Synthesized Gold Nanoparticles Using Mangifera indica Fruit Peel Extract 利用芒果果皮提取物绿色合成金纳米粒子的尺寸依赖性表面等离子共振

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-92udae

Jared Deve P. Delicana, Romnick B. Unabia, Jay C. Dulog, Aldrin Lalem, Noel Lito B. Sayson, R. Capangpangan, A. Lubguban, Arnold A. Alguno

{"title":"Size-Dependent Surface Plasmon Resonance of Green Synthesized Gold Nanoparticles Using Mangifera indica Fruit Peel Extract","authors":"Jared Deve P. Delicana, Romnick B. Unabia, Jay C. Dulog, Aldrin Lalem, Noel Lito B. Sayson, R. Capangpangan, A. Lubguban, Arnold A. Alguno","doi":"10.4028/p-92udae","DOIUrl":"https://doi.org/10.4028/p-92udae","url":null,"abstract":"Gold nanoparticles (AuNPs) have been studied for various applications due to their adjustable surface plasmon resonance (SPR) properties and facile synthesis. AuNP production has predominantly relied on synthetic chemicals to reduce and stabilize gold precursors. There is an increasing demand for environmentally friendly synthesis methods due to ecological concerns. This work introduced a green synthesis approach using Mangifera indica fruit peel extract. Obtained through maceration of dried fruit peels, this extract served as a reducing agent for gold precursors at 80°C. We obtained varying sizes of AuNPs by manipulating the initial concentration of gold ions: 0.1mM, 0.25mM, and 0.5mM. The UV-vis spectroscopy results confirmed the signature SPR peak for AuNPs around 530 nm, with peak shifts highly dependent on the gold ion concentration. The dynamic light scattering (DLS) measurements revealed hydrodynamic diameters of 89.5 nm, 121.5 nm, and 144.5 nm for the various concentrations. The Fourier transform (FTIR) analysis identified the role of inherent phenols and flavonoids in gold precursor reduction. This study emphasizes the potential of Mangifera indica fruit peel extract as a viable alternative for AuNP synthesis. This study could possibly boost the utilization of gold nanoparticles towards applications in biology and medicine as well as environmental remediation.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139835029","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

Effect of Hydrolysis Reactor Design on Maltodextrin Production 水解反应器设计对麦芽糊精生产的影响

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-ocuq1d

A. S. Handayani, Kevin Gabryelle, Miliendi Ananda Setyawan, Annisa Nurul Syabila

引用次数: 0

Experimental and Modelling of Shape Memory Effect of Shape Memory Natural Rubber 形状记忆天然橡胶的形状记忆效应实验与建模

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-zts6ld

Y. Kow, Ai-Bao Chai, Jee Hou Ho

引用次数: 0