Open Access. Powered by Scholars. Published by Universities.®
Materials Science and Engineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Microstructure (9)
- Chitosan (7)
- Rice husk ash (7)
- Mechanical properties (6)
- Hardness (5)
-
- Heat treatment (5)
- Coating (4)
- Oxidation (4)
- Sintering (4)
- Stainless steel (4)
- Adhesion (3)
- Fatigue (3)
- Glass-ceramics (3)
- Hydroxyapatite (3)
- Layer-by-layer (3)
- Polypropylene (3)
- Powder metallurgy (3)
- Precipitation (3)
- Silica (3)
- Strain rate (3)
- X-ray diffraction (3)
- AISI 4140 steel (2)
- Adsorption (2)
- And Nickel-Based Superalloy (2)
- Collagen (2)
- Corrosion (2)
- Cotton fabric (2)
- Cyclohexane (2)
- ECAP (2)
- EN AW 6082 aluminium alloy (2)
Articles 91 - 120 of 788
Full-Text Articles in Materials Science and Engineering
Oxidation Of Sn-1 Wt.% Bi In Air And In Oxygen Deprived Environment, Pakawat Polmanee, Benjie Fernandez, Patama Visuttipitukul, Ittipon Cheowanish, Tachai Luangvaranunt
Oxidation Of Sn-1 Wt.% Bi In Air And In Oxygen Deprived Environment, Pakawat Polmanee, Benjie Fernandez, Patama Visuttipitukul, Ittipon Cheowanish, Tachai Luangvaranunt
Journal of Metals, Materials and Minerals
Oxidation of Sn-1wt% Bi in air and in oxygen deprived environment is studied in this research. Electrochemical process with SERA technique was used to determine oxide film thickness and rate of oxidation of tin alloy. The thickness of oxide film at 72 hours of the specimens that is tested in air, in vacuum, in argon environment, and wrapped with plastic film are 16, 10, 18, and 13 Å respectively. XPS was used to determine the type of oxides in the oxide layer. Result after signals deconvolution shows that SnO and SnO2 compounds were formed on the Sn-1wt% Bi surface.
Solar Radiation Assisted Photocatalytic Degradation Of Congo Red Using Ce Doped Lacoo3, Rishabh Kamal, Rasmirekha Pattanaik, Debapriya Pradhan, Suresh Kumar Dash
Solar Radiation Assisted Photocatalytic Degradation Of Congo Red Using Ce Doped Lacoo3, Rishabh Kamal, Rasmirekha Pattanaik, Debapriya Pradhan, Suresh Kumar Dash
Journal of Metals, Materials and Minerals
A viable sol-gel synthesis technique was used to synthesize LaCoO3 and Ce doped LaCoO3 for degradation of congo red dye taking a renewable source of light i.e solar radiation. The crystalline structure, morphology, and optical properties of the synthesized catalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) analysis of Ce-doped LaCoO₃ confirmed the presence of La (3d), Ce (3d), Co (2p), C (1s), and O (1s) and their valence states in the perovskite matrix, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and ultraviolet diffuse reflectance spectroscopy (UV-DRS). The XRD analysis with a prominent diffraction peak detected …
Optimization And Characterization Of Carrageenan/Alginate Ratio And Seaweed Waste To Develop Composite Bioplastics From Kappaphycus Alvarezii, Ali Ridlo, Retno Hartati, Agus Sabdono
Optimization And Characterization Of Carrageenan/Alginate Ratio And Seaweed Waste To Develop Composite Bioplastics From Kappaphycus Alvarezii, Ali Ridlo, Retno Hartati, Agus Sabdono
Journal of Metals, Materials and Minerals
Carrageenan and alginate, derived from seaweed, offer potential as alternatives to traditional plastics. This study aims to assess the properties of biodegradable bioplastics made from a composite of carrageenan, alginate, and waste from K. alvarezii seaweed carrageenan extraction. A mixture of carrageenan and alginate was added with a ratio of 4:6 and K. alvarezii extraction waste 0, 20, 40, 60, and 80 % waste concentration, in the carrageenan-alginate-waste mixture. The process involves blending carrageenan, alginate, waste, glycerol, and distilled water until uniform at 90o C and 1000 rpm for 45 minutes, followed by molding, immersion in a 4% CaCl2 solution, …
Green-Synthesized Yttrium-Doped Cerium Oxide Nanoparticles: A Promising Optical Material, Sasmita Sarangi, Nibedita Nayak, Binita Nanda, Tapas Sahoo
Green-Synthesized Yttrium-Doped Cerium Oxide Nanoparticles: A Promising Optical Material, Sasmita Sarangi, Nibedita Nayak, Binita Nanda, Tapas Sahoo
Journal of Metals, Materials and Minerals
This work focuses on the green synthesis, characterization, and optical properties of yttrium-doped cerium dioxide (CeO2) nanoparticles. A green approach was adopted using Acacia concinna fruit extract as surfactant and stabilizing agent. Their structural, morphological, and physical-chemical properties were characterized using different analytical techniques, like XRD, FE-SEM, FTIR, PL, Raman, UV-Visible Spectroscopy. XRD study validated the structure of cubic fluorite-type structure of CeO2 nanoparticles, with the average crystallite size ranging between 7-15 nm. Raman spectroscopy validated this structure with F2g band observed at 463 cm−1. FESEM images showed irregular spherical morphologies with grain sizes in the range of 50-60 nm. …
Pyrolysis And Modification Of Coconut Shell Into Sulfonated Biochar And Its Catalytic Activity On Cellobiose Conversion, Addy Rachmat, Yessi Eka Wahyu, Poedji Loekitowati Hariani, Fahma Riyanti, Fatma Fatma
Pyrolysis And Modification Of Coconut Shell Into Sulfonated Biochar And Its Catalytic Activity On Cellobiose Conversion, Addy Rachmat, Yessi Eka Wahyu, Poedji Loekitowati Hariani, Fahma Riyanti, Fatma Fatma
Journal of Metals, Materials and Minerals
Coconut shell was successfully valorized into sulfonated biochar through carbonization in various temperatures and duration. This work aims to provide suitable solid acid carbonaceous catalyst for cellobiose conversion into valuable product. Sulfonated biochar is characterized to evaluate its crystallinity, sulfonate, and oxygenated functional groups by XRD method and FTIR spectroscopy. The resulting solid acid carbonaceous material was tested toward cellobiose hydrolysis to assess its catalytic activity in various time, temperature, and catalyst weight. FTIR spectra reveals some of the biochar product has sulfonate group as indicated by absorbance band at 1234 cm‒1, 1070 cm‒1 and 1180 cm‒1, which belongs to …
Macro-Encapsulation Of Polyethylene Glycol And Magnetite (Fe3o4) In Concrete As Phase Change Materials For Building Thermal Management, Muhammad Fauzi, Budhy Kurniawan, Anggito Pringgo Tetuko, Timbangen Sembiring, Fanna Nilam, Amdy Fachredzy, Perdamean Sebayang
Macro-Encapsulation Of Polyethylene Glycol And Magnetite (Fe3o4) In Concrete As Phase Change Materials For Building Thermal Management, Muhammad Fauzi, Budhy Kurniawan, Anggito Pringgo Tetuko, Timbangen Sembiring, Fanna Nilam, Amdy Fachredzy, Perdamean Sebayang
Journal of Metals, Materials and Minerals
Thermal management technology is a crucial strategy for reducing energy consumption in buildings by utilizing stored solar energy. This study developed a polyethylene glycol (PEG)-based phase-change material (PCM), selected for its superior physicochemical stability, high latent enthalpy, and environmental compatibility. To enhance thermal conductivity, 20 vol% magnetite (Fe₃O₄) was incorporated into the PEG matrix. The composite was synthesized via an ultrasonic-assisted method (37 kHz, 80°C, 1 h). X-ray diffraction (XRD) confirmed the crystalline structure of PEG and the cubic phase of Fe3O4, while Fourier-transform infrared spectroscopy (FTIR) validated the synthesis by identifying Fe–O, C–H, and O–H functional groups. Scanning electron …
The Effect Of Pt And Pd Decoration On Sno2 Slant Nanorods Fabricated Using Dc Magnetron Sputtering With Oad Technique For Co Gas Sensing Applications, Nampueng Pangpaiboon, Thitiporn Kaewyou, Sethavut Duangchan, Kata Jaruwongrungsee, Manatsawee Srirak, Tossaporn Lertvanithphol, Viyapol Patthanasettakul, Tawee Pogfay, Mati Horprathum, Saksorn Limwichean
The Effect Of Pt And Pd Decoration On Sno2 Slant Nanorods Fabricated Using Dc Magnetron Sputtering With Oad Technique For Co Gas Sensing Applications, Nampueng Pangpaiboon, Thitiporn Kaewyou, Sethavut Duangchan, Kata Jaruwongrungsee, Manatsawee Srirak, Tossaporn Lertvanithphol, Viyapol Patthanasettakul, Tawee Pogfay, Mati Horprathum, Saksorn Limwichean
Journal of Metals, Materials and Minerals
This research investigates the effect of Pt and Pd decoration on the structure of SnO2 slant nanorods (SNRs) films produced using DC magnetron sputtering with Oblique Angle Deposition (OAD), as well as their impact on the films' physical properties and gas sensing applications. Pt and Pd were deposited onto the SnO2 SNRs for the same duration of 20 s each. Following deposition, all the films were heat-treated temperature at 400℃ for 2 h. The characterization of both as-deposited and annealed films involved analyzing the physical morphology using FE-SEM and the crystal structure using GI-XRD. It was observed that the structure …
Microwave Absorption Properties Of Porous Activated Carbon/Nickel Oxide Composites Derived From Coconut Husks, Mohamad Zul Aqiman Shukeri, Nor Zakiah Yahaya, Ezzan Afifah Zainuddin, Nazri Mahmud, Liyana Zahid, Hasliza A. Rahim
Microwave Absorption Properties Of Porous Activated Carbon/Nickel Oxide Composites Derived From Coconut Husks, Mohamad Zul Aqiman Shukeri, Nor Zakiah Yahaya, Ezzan Afifah Zainuddin, Nazri Mahmud, Liyana Zahid, Hasliza A. Rahim
Journal of Metals, Materials and Minerals
Porous Activated Carbon (AC) is a promising material for microwave absorbing materials, showing potential in communication and modern warfare. The study explores the process of creating porous AC from coconut husks using hydrochloric acid and carbonization at varying temperatures, followed by doping AC with nickel oxide to create an AC/NiO polymer composite with varying thicknesses. These composites are compared to AC composites loaded in a paraffin matrix. The dielectric and microwave (MW) properties of the AC/NiO and AC polymer composites at various thicknesses were analyzed using a Performance (PNA)-X Network Analyzer. The study also examines the carbon content and porosity …
Improvement In Electrical And Energy Storage Properties Of Lead-Free Bnkt-Bt Piezoceramics, Manlika Kamnoy, Supalak Manotham, Pichitchai Butnoi, Sukum Eitssayeam, Piewpan Parjansri
Improvement In Electrical And Energy Storage Properties Of Lead-Free Bnkt-Bt Piezoceramics, Manlika Kamnoy, Supalak Manotham, Pichitchai Butnoi, Sukum Eitssayeam, Piewpan Parjansri
Journal of Metals, Materials and Minerals
The electrical characteristics and energy storage performance of BNKT-BT lead-free piezoceramics were examined. All ceramics were produced via the mixed oxide technique. The findings indicated that the density of this ceramic system varied between 5.61 and 5.83 g/cm3. Conditions with 2.0 mol% (BT=0.02) and 6.0 mol% (BT=0.06) exhibited the largest dielectric constant (er) at both ambient temperature and elevated temperature, with values of 1307 and 4272, respectively. The ceramic sample with BT = 0.06 exhibited the highest values of %strain ~0.13 and a d*33 ~179.65 pm/V. Furthermore, BT-doped ceramics yielded optimal energy storage densities compared to undoped BNKT ceramics. The …
Optimization Of Indigo Dyeing On Modal Fabrics Using Thiourea Dioxide As An Environmentally Friendly Reducing Agent, Monthon Nakpathom, Buppha Somboon, Nootsara Narumol, Rattanaphol Mongkholrattanasit, Pisutsaran Chitichotpanya, Nattaya Vuthiganond
Optimization Of Indigo Dyeing On Modal Fabrics Using Thiourea Dioxide As An Environmentally Friendly Reducing Agent, Monthon Nakpathom, Buppha Somboon, Nootsara Narumol, Rattanaphol Mongkholrattanasit, Pisutsaran Chitichotpanya, Nattaya Vuthiganond
Journal of Metals, Materials and Minerals
This investigation examines the potential of thiourea dioxide as an environmentally reducing agent for dyeing of natural indigo on modal fabrics. Although traditional sodium dithionite is effective, its sulfur by-products generate environmental concerns. Thiourea dioxide, which provides a more environmentally friendly alternative, was studied under various dyeing conditions. In this study, six dyeing parameters, including thiourea dioxide and sodium hydroxide concentrations, reduction temperature, reduction duration, dyeing time, and reduction-oxidation cycles, were optimized to enhance color strength. Results indicated that the most favorable reduction conditions were achieved when 80 g/L of thiourea dioxide and 2 g/L of sodium hydroxide were heated …
Eco-Friendly Synthesis Of Flower-Like Hierarchical Structure Of Cuo Nps For Advancing Photocatalytic Efficiency And Antibacterial Applications, Yodchai Tangjaideborisut, Shanmugam Shanmugam, Supakorn Boonyuen, Govindasamy Siva, Prema Yugala, Joon Ching Juan, Choowin Phanawansombat, Atchariya Pitintharangkul, Seerangaraj Vasantharaj, Pornpan Pungpo, Pariya Na Nakorn
Eco-Friendly Synthesis Of Flower-Like Hierarchical Structure Of Cuo Nps For Advancing Photocatalytic Efficiency And Antibacterial Applications, Yodchai Tangjaideborisut, Shanmugam Shanmugam, Supakorn Boonyuen, Govindasamy Siva, Prema Yugala, Joon Ching Juan, Choowin Phanawansombat, Atchariya Pitintharangkul, Seerangaraj Vasantharaj, Pornpan Pungpo, Pariya Na Nakorn
Journal of Metals, Materials and Minerals
In recent decades, environmental pollution caused by organic dyes and pathogenic microorganisms has posed significant challenges to both ecological and public health. Therefore, the development of multifunctional materials capable of simultaneously degrading dyes and exhibiting antibacterial properties is crucial for effective environmental remediation. Combining photocatalytic dye degradation with antibacterial activity offers a promising approach to address these dual concerns in a single process. The present study investigates the copper oxide nanparticles (CuNPs) were prepared by green synthetic method using bamboo extract for degradation of methylene blue and in inactivation of biological pathogens. The green synthesized CuONPs were characterized various spectroscopic …
Enhancing Efficiency And Productivity Of Microbial Fuel Cells For Optimization Of Wastewater Treatment With Bioenergy Production, Diptimayee Pradhan, Krishna Pada Bauri, Debarpita Ghosal, Satchidananda Mishra, Abhijeet Das, Aditya Raj Singh, Akhil Gedela, Kumbhakarna Mallik, Mohammed Hassan Ali Hbag
Enhancing Efficiency And Productivity Of Microbial Fuel Cells For Optimization Of Wastewater Treatment With Bioenergy Production, Diptimayee Pradhan, Krishna Pada Bauri, Debarpita Ghosal, Satchidananda Mishra, Abhijeet Das, Aditya Raj Singh, Akhil Gedela, Kumbhakarna Mallik, Mohammed Hassan Ali Hbag
Journal of Metals, Materials and Minerals
The primary objective is to remove the pollutants from the wastewater streams and reintegrate them into the water cycle, therefore safeguarding the environment and promoting public health. The utilization of membrane fuel cells (MFCs) enables the conversion of organic molecules present in wastewater into electrical energy, while concurrently generating potable water. To optimize the process, it is essential to understand the parameters that affect the performance and the relevant techniques such as electrode materials, microbial collectives, and operating settings to improve the efficiency and performance of MFC. Thus, it aims to present novel ideas that support the real-world deployment of …
A Review On Recent Progress In Supported Magnetic Nanoparticles: From Synthetic Methods To Applications, Khushboo Dhiman, Ayashkanta Nanda, Navneet Kaur, Manvinder Kaur, Harvinder Singh Sohal, Himanshi Sharma, Meenakshi Verma
A Review On Recent Progress In Supported Magnetic Nanoparticles: From Synthetic Methods To Applications, Khushboo Dhiman, Ayashkanta Nanda, Navneet Kaur, Manvinder Kaur, Harvinder Singh Sohal, Himanshi Sharma, Meenakshi Verma
Journal of Metals, Materials and Minerals
Magnetic nanoparticles supported on various materials have recently gained significant attention due to their wide range of applications across multiple fields such as catalysis, biomedicine, environmental remediation, and magnetic separation. The support materials are essential for stabilizing magnetic nano-particles and enhancing their properties, thereby improving their performance and versatility. This review presents a comprehensive summary of recent advancements and key developments in supported magnetic nanoparticles, focusing on various support materials including silica, alumina, cellulose, charcoal, polymeric materials, and carbon nanotubes. We also discussed why we needed a shift from conventional nanoparticles to magnetic nanoparticles and from magnetic nanoparticles to supported …
Comprehensive Study On The Structural And Optical Properties Of Bismuth Manganese Oxide Composite Ceramic For Optoelectronic Applications, P. P. Nayak, B. Swain, R. R. Patro, S. S. Hota, O. P. Das, S. Bhuyan
Comprehensive Study On The Structural And Optical Properties Of Bismuth Manganese Oxide Composite Ceramic For Optoelectronic Applications, P. P. Nayak, B. Swain, R. R. Patro, S. S. Hota, O. P. Das, S. Bhuyan
Journal of Metals, Materials and Minerals
This work assessed the potential of bismuth manganese oxide composite ceramic for optoelectronic applications by methodically examining its structural, vibrational, and optical characteristics. X-ray diffraction (XRD) spectroscopy provided the coexistence of Bi12MnO20 (sillenite-type) and Bi2Mn4O10 (mullite-type) phases, indicating a deviation from the ideal perovskite structure and suggesting a complex crystallographic nature influencing its functional properties. Fourier transform infrared (FTIR) spectroscopy confirmed the modes of vibration of Bi–O and Mn–O bonds that were contained, supporting the structural composition. UV-Vis-NIR spectroscopy demonstrated strong optical absorption in the 300 nm to 800 nm range, affirming the suitability of the material for optoelectronic applications. …
Fem Modeling And Comparative Study Of Graphite Lubricants In The Hot Forging Of Aisi 1045 Medium Carbon Steel, Raschanan Poungprasert, Nattarawee Siripath, Naiyanut Jantepa, Surasak Suranuntchai
Fem Modeling And Comparative Study Of Graphite Lubricants In The Hot Forging Of Aisi 1045 Medium Carbon Steel, Raschanan Poungprasert, Nattarawee Siripath, Naiyanut Jantepa, Surasak Suranuntchai
Journal of Metals, Materials and Minerals
This study investigates the performance of water-based and oil-based graphite lubricants in the hot forging of AISI 1045 medium carbon steel, aiming to enhance product quality while minimizing die wear. Utilizing Finite Element Method (FEM) simulations and experimental analysis, we examined key factors including flow lines, dimensional accuracy, forging load, and die wear. Results indicate that oil-based graphite lubricants significantly outperform water-based options, achieving a lower average error of 0.26% in dimensional accuracy compared to 0.99% for water-based lubricants. Additionally, oil-based lubricants resulted in reduced forming loads, leading to improved energy efficiency and longer die life. Microstructural analysis revealed that …
Effect Of Compaction Pressure On The Structure And Mechanical Properties Of Functionally Graded Aluminium-Glass Microsphere (Fgagm) Foams Produced By Powder Metallurgy Process, Vicheka Moeun, Seksak Asavavisithchai
Effect Of Compaction Pressure On The Structure And Mechanical Properties Of Functionally Graded Aluminium-Glass Microsphere (Fgagm) Foams Produced By Powder Metallurgy Process, Vicheka Moeun, Seksak Asavavisithchai
Journal of Metals, Materials and Minerals
Functionally graded aluminium-glass microsphere (FGAGM) foams were successfully fabricated via powder metallurgy. The influence of compaction pressure on the structural and mechanical properties of the foams was systematically investigated. The study observed that increasing compaction pressure enhanced the green (pre-sintering) density of FGAGM foam, while post-sintering densities exhibited a decreasing trend with higher compaction pressures. The mechanical examination indicated that mechanical properties improved significantly with higher compaction pressures. While higher compaction pressures generally improve mechanical properties, the study identified that excessive pressures could lead to the fracture of GM particles, introducing defects that compromise the foam's structural integrity. Therefore, determining …
Structural Tuning Of Bioi Toward Bi O /Agi Heterostructures Via Room-Temperature Ion Exchange For Improved Photocatalytic Activity, Varunya Atimayulerd, Sorawit Thueanbangyang, Kittiyaporn Singsumphan, Ganyaporn Wongwaen, Cheewita Suwanchawalit, Montri Aiempanakit
Structural Tuning Of Bioi Toward Bi O /Agi Heterostructures Via Room-Temperature Ion Exchange For Improved Photocatalytic Activity, Varunya Atimayulerd, Sorawit Thueanbangyang, Kittiyaporn Singsumphan, Ganyaporn Wongwaen, Cheewita Suwanchawalit, Montri Aiempanakit
Journal of Metals, Materials and Minerals
In this work, a bismuth oxide/silver iodide (Bi2O3/AgI) heterojunction photocatalyst was successfully fabricated via a room-temperature ion exchange process using bismuth oxyiodide (BiOI) as a morphology-directing precursor. Building upon our previous work on solvent-modulated BiOI nanostructures, this study employs a chemical transformation route to develop interfacially connected heterostructures while preserving key morphological features. Structural, morphological, and optical characterizations, including X-ray diffraction, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, and ultraviolet–visible diffuse reflectance spectroscopy, provided supporting evidence for the successful formation of Bi2O3/AgI heterojunctions with likely close interfacial contact. The optimized Bi2O3/AgI composite with a 50:50 mass ratio …
Optically Stimulated Luminescence Dating Of Earthenware From The Nam Tok Khao Pang Archaeological Site, Kanchanaburi, Thailand, Thananan Phetkongtong, Peerasak Klubket, Santi Pailoplee, Pichet Limsuwan, Voranuch Thongpool
Optically Stimulated Luminescence Dating Of Earthenware From The Nam Tok Khao Pang Archaeological Site, Kanchanaburi, Thailand, Thananan Phetkongtong, Peerasak Klubket, Santi Pailoplee, Pichet Limsuwan, Voranuch Thongpool
Journal of Metals, Materials and Minerals
The Nam Tok Khao Pang archaeological site, located in Tha Sao subdistrict, Sai Yok district, Kanchanaburi province, Thailand, is a limestone cave where numerous artifacts, including black-burnished earthenware fragments with in-curving rims, out-curving rims, and carinated bodies, have been discovered. Mineralogical and microstructural analyses using X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and scanning electron microscopy (SEM) identified quartz (SiO₂) as the dominant mineral phase within a partially sintered silicate matrix. The absence of vitrification and the presence of mineral impurities indicate that the earthenware was fired at temperatures between 900°C and 1000°C. To determine the age of these ceramics, …
Facile Bio-Synthesis Of Cerium Oxide Nanoparticles, Characterization And Their Photocatalytic Potential In The Degradation Of Real Tannery Wastewater, Ganeshkumar Govindasamy, A. Babu Ponnusami
Facile Bio-Synthesis Of Cerium Oxide Nanoparticles, Characterization And Their Photocatalytic Potential In The Degradation Of Real Tannery Wastewater, Ganeshkumar Govindasamy, A. Babu Ponnusami
Journal of Metals, Materials and Minerals
The sustainable metal oxide photocatalysts using plant extract presents a viable alternative to conventional chemical synthesis techniques. In this study, spherical shaped cerium oxide nanoparticles were synthesized using ammonium ceric nitrate and Peepal Leaves (PL) extracted and used as a photocatalyst to remove hexavalent chromium and chemical oxygen demand from actual tannery wastewater. The characterization of cerium oxide nanoparticles was carried out using UV-Visible spectroscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, Brunauer-Emmett-Teller surface area analysis, Field Emission-Scanning Electron Microscopy with energy-dispersive X-ray spectroscopy, Raman analysis, High Resolution-Transmission Electron Microscopy and Zeta potential analysis. The band gap energy of 3.25 eV was …
Enhancing Acetone Gas Sensor Performance With Cobalt Oxide Doping In Lafeo3 Prepared By Co-Precipitation, Andhy Setiawan, Farah Aprisza Sheelmarevaa, Muhamad Taufik Ulhakim, Dani Gustaman Syarif, Endi Suhendi
Enhancing Acetone Gas Sensor Performance With Cobalt Oxide Doping In Lafeo3 Prepared By Co-Precipitation, Andhy Setiawan, Farah Aprisza Sheelmarevaa, Muhamad Taufik Ulhakim, Dani Gustaman Syarif, Endi Suhendi
Journal of Metals, Materials and Minerals
Semiconductor-based gas sensors frequently encounter difficulties in attaining optimal performance due to challenges such as temporal stability and low sensitivity, stemming from their insulating properties at room temperature. To address these limitations, this study proposes a novel approach by preparing cobalt-doped LaFeO3 (LaFeO3-Co) using the co-precipitation method, with doping concentrations of 2.5 mol% and 5.0 mol%. The acetone gas sensors were fabricated into thick films via the screen-printing technique, and their performance was thoroughly characterized. X-ray diffraction (XRD) analysis confirmed a cubic crystal structure, and the addition of 2.5 mol% cobalt was found to reduce the particle size of LaFeO3, …
Enhanced Photocatalytic Reduction Of Cr(Vi) Under Visible Light A Magnetically Separable Tio2-Fe/Fe3o4 Photocatalyst Prepared From Iron Rusty Waste, Khoirunisa Khoirunisa, Novianti Dwi Lestari, Endang Tri Wahyuni, Taufik Abdillah Natsir
Enhanced Photocatalytic Reduction Of Cr(Vi) Under Visible Light A Magnetically Separable Tio2-Fe/Fe3o4 Photocatalyst Prepared From Iron Rusty Waste, Khoirunisa Khoirunisa, Novianti Dwi Lestari, Endang Tri Wahyuni, Taufik Abdillah Natsir
Journal of Metals, Materials and Minerals
This research deals with enhancing the visible activity and generating the magnetic property of TiO2 by Fe doping and Fe3O4 impregnation respectively, using rusty iron waste as Fe source. The prepared TiO2-Fe/Fe3O4 photocatalysts were characterized by SR-UV/Visible, FTIR, XRD, and SEM-EDX instruments. The resulting photocatalysts are responsive to visible light and can be separated magnetically and used for photoreduction of Cr (VI) ions. In the photoreduction of Cr(VI) over TiO2-Fe/Fe3O4 photo-catalysts with various amounts of Fe dopant and alteration of Fe3O4 fraction, the photocatalyst mass, irradiation time, and solution pH were optimized. The research results assign that doping Fe to …
Hydroxyl Combined With Nitrogen On Biomass Carbon Promotes The Electrocatalytic H2o2 Selectivity, Jiabi Jiang, Danni Deng, Yuchao Wang, Yingbi Chen, Yu Bai, Meng Wang, Xiang Xiong, Yongpeng Lei
Hydroxyl Combined With Nitrogen On Biomass Carbon Promotes The Electrocatalytic H2o2 Selectivity, Jiabi Jiang, Danni Deng, Yuchao Wang, Yingbi Chen, Yu Bai, Meng Wang, Xiang Xiong, Yongpeng Lei
Journal of Metals, Materials and Minerals
Elevating the selectivity of two-electron oxygen reduction reaction (2e‒ ORR) is challenging. Herein, the hydroxyl combined with nitrogen on biomass carbon exhibits a high H2O2 selectivity over a wide potential range of 0 V to 0.5 V vs. RHE, which is nearly 97% at 0.3 V vs. RHE. The combination of hydroxyl and nitrogen improves the adsorption and desorption of intermediates, finally changing the reaction pathway and promoting the selectivity of 2e‒ ORR. The Faradaic efficiency (FE) reaches 98% at 0.3 V vs. RHE. Furthermore, the typical organic pollutants were degraded on site in flow cell. This work illustrates the …
Elucidating The Corrosion Of Carbon Steel In Hybrid Monoethanolamine Solutions Containing Methanol Or N-Methyl-2-Pyrrolidone, Pui Yee Tan, Lian See Tan, Swee Pin Yeap, Peck Loo Kiew, Mee Kee Wong, Azmi Mohd Shariff
Elucidating The Corrosion Of Carbon Steel In Hybrid Monoethanolamine Solutions Containing Methanol Or N-Methyl-2-Pyrrolidone, Pui Yee Tan, Lian See Tan, Swee Pin Yeap, Peck Loo Kiew, Mee Kee Wong, Azmi Mohd Shariff
Journal of Metals, Materials and Minerals
Corrosion has been a persistent issue in carbon dioxide (CO2) absorption unit that needs to be resolved in order to prolong the life span of the absorber unit. In this regard, understanding the corrosion behaviour, particularly in hybrid monoethanolamine (MEA) solutions, is crucial. This study aims to give detail information on the role of different process parameters, encompassing types of amine solution, temperature, and CO2 loading on the corrosion behaviour of carbon steel in system containing hybrid solution of monoethanolamine (MEA) and methanol (MeOH) or N-methyl-2-pyrrolidone (NMP). Here, the corrosion extent of the carbon steel was evaluated using gravimetric experiments. …
High-Binding Affinity Nanobody Against Sars-Cov-2 Xbb.1.5: Computational-Based Protein Engineering, Phoomintara Longsompurana, Napat Kongtaworn, Rungtiva P. Poo-Arporn, Thanyada Rungrotmongkol
High-Binding Affinity Nanobody Against Sars-Cov-2 Xbb.1.5: Computational-Based Protein Engineering, Phoomintara Longsompurana, Napat Kongtaworn, Rungtiva P. Poo-Arporn, Thanyada Rungrotmongkol
Journal of Metals, Materials and Minerals
The emergence of the SARS-CoV-2 variant XBB.1.5 has triggered a global health crisis by enhancing viral entry into cells via its spike protein. This study addresses the urgent need to develop neutralizing nanobodies (Nbs) to counteract the SARS-CoV-2 virus. Our aim was to identify a lead Nb and enhance its binding affinity to the receptor-binding motif (RBM) on the receptor-binding domain (RBD) of the SARS-CoV-2 spike protein (S-protein) using computational methods. A total of 29 Nbs were screened against the XBB.1.5 RBD using the HDOCK server to select a lead Nb. This investigation revealed that Nb_7KGK exhibited the highest binding …
Electrochemical Study Of Zn-Fe Alloy Coatings On Mild Steel For Automotive Applications, Ramesh Bhat, A. Chitharanjan Hegde
Electrochemical Study Of Zn-Fe Alloy Coatings On Mild Steel For Automotive Applications, Ramesh Bhat, A. Chitharanjan Hegde
Journal of Metals, Materials and Minerals
This study investigates the electrochemical behavior of Zn-Fe alloy deposited on mild steel (MS) substrates for automotive applications. The electrodeposition of a Zn-Fe alloy onto MS using an acid chloride bath, with 1,2,4-Triazole as an additive to enhance the uniformity of the deposit. The hull cell method was used to optimize the bath composition and operating conditions. The coatings were produced using electrodeposition at varying current densities, with 3 A∙dm‒2 identified as the optimal current density (CD) for achieving uniform coatings. The microstructural properties, including crystallite size and micro-strain, were analyzed using X-ray diffraction (XRD) and Williamson-Hall (W-H) analysis, revealing …
Influence Of The Casting Processes And Aging Times On The Microstructure And Hardness Of Alsi12 Cu Cast Alloys, Said Beroual, Pascal Paillard, Yann Borjon-Piron
Influence Of The Casting Processes And Aging Times On The Microstructure And Hardness Of Alsi12 Cu Cast Alloys, Said Beroual, Pascal Paillard, Yann Borjon-Piron
Journal of Metals, Materials and Minerals
The present study investigated the effects of the casting processes and aging times on the micro-structure and hardness of commercial AlSi12Cu alloys. The primary goal was to assess how various aging times affect the maximum hardness of the alloy and to evaluate the influence of cooling rates on hardness values obtained from sand casting (SC) and High-pressure die casting (HPDC). For both casting alloys, the solution heat treatment was performed at 540℃, followed by quenching. The alloys were then aged at 180℃ for various durations, ranging from 10 min to 50 h. The results reveal significant microstructural changes in the …
Photodegradation Of Malachite Green Using 2d G-C3n5 Nanosheet: A Promising Metal Free Catalyst, Sonali Biswal, Swayam Aryam Behera, Asima Subhadarshini, P. Ganga Raju Achary, Binita Nanda
Photodegradation Of Malachite Green Using 2d G-C3n5 Nanosheet: A Promising Metal Free Catalyst, Sonali Biswal, Swayam Aryam Behera, Asima Subhadarshini, P. Ganga Raju Achary, Binita Nanda
Journal of Metals, Materials and Minerals
Environmental issues have become more serious these days due to the growth of modern industries. The paper and textile industries, in particular, were heavily dependent on the printing and discharge of dye, which constantly leaked into the water ecology and constituted a serious risk to public health. Organic wastewater treatment and remediation for its associated risks have received a lot of attention lately. This work explored the potential of the g-C3N5 nanostructure as a novel photocatalyst for malachite green degradation in aqueous solution while exposed to visible light. The nanocomposite was fabricated through an ultrasonicate-assisted technique. A number of analysis …
Regulating Copx/Co Heterostructures For Enhanced Electrocatalytic Activity Toward Hydrazine Oxidation Reaction, Qinquan Lin, Rui Zhang, Changli Yan, Qizhao Hu, Shangbin Sang, Qiumei Wu, Kaiyu Liu, Hongtao Liu
Regulating Copx/Co Heterostructures For Enhanced Electrocatalytic Activity Toward Hydrazine Oxidation Reaction, Qinquan Lin, Rui Zhang, Changli Yan, Qizhao Hu, Shangbin Sang, Qiumei Wu, Kaiyu Liu, Hongtao Liu
Journal of Metals, Materials and Minerals
Hydrazine hydrate (N2H4∙H2O) is considered an ideal fuel for fuel cells. Constructing a cobalt phosphide/cobalt (CoPx/Co) heterostructure can achieve efficient electrocatalytic activity for hydrazine oxidation reaction. Traditional strategies for constructing CoPx/Co heterostructures took less consideration on the exposure of the active sites. In this study, 3D nanoflower-like nano CoPx/Co heterostructures with highly exposed active sites were obtained on a nickel foam (NF) through a dual-component phosphating strategy, i.e., regulating the relative content of Co and Co(OH)2 with cathodic current density and utilizing the differences in their phosphating behaviors. The potential at 100 mA∙cm‒2 and Tafel slope of the optimized CoPx/Co(375)@NF …
Facile Synthesis Of Bamno3-Zro2 Composite: A Step Towards The Photocatalytic Degradation Of Organic Dye, Kirttimayee Mohanta, Swayam Aryam Behera, Binita Nanda, P. Ganga Raju Achary
Facile Synthesis Of Bamno3-Zro2 Composite: A Step Towards The Photocatalytic Degradation Of Organic Dye, Kirttimayee Mohanta, Swayam Aryam Behera, Binita Nanda, P. Ganga Raju Achary
Journal of Metals, Materials and Minerals
Environmental contamination by synthetic dyes, particularly Methylene Blue (MB), presents a significant threat to aquatic ecosystems and human health due to their chemical stability and toxicity. This study investigates the photocatalytic degradation of MB using a BaMnO3:ZrO2 composite synthesized in a 1:2 ratio via a straightforward wet-chemical method. Structural and optical characterizations were performed using X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and Ultraviolet-visible diffuse reflectance spectroscopy (UV-DRS). The composite exhibited a reduced bandgap of 2.88 eV and uniform nanoscale morphology, both favorable for visible-light-driven photocatalysis. Under visible-light irradiation, the catalyst achieved 89% degradation efficiency within …
The Effects Of Graphene Nanoplatelets And Microcrystalline Cellulose On The Mechanical Properties Of Fiberglass And Carbon Fiber Composites, Duangjai Srisamut, Nathawat Poopakdee, Warut Thammawichai
The Effects Of Graphene Nanoplatelets And Microcrystalline Cellulose On The Mechanical Properties Of Fiberglass And Carbon Fiber Composites, Duangjai Srisamut, Nathawat Poopakdee, Warut Thammawichai
Journal of Metals, Materials and Minerals
This study investigated how graphene nanoplatelets (GNP) and microcrystalline cellulose (MCC) affect the mechanical properties of epoxy (EP), carbon fiber (CF), and fiberglass (FG) composites. The tensile and flexural properties of GNP-EP and MCC-EP of varying reinforcement concentrations were examined. Results indicated significant improvements on tensile and flexural properties by GNP and MCC. At 0.1 wt% GNP, tensile and flexural strengths increased by 10% and 21%, while 2.0 wt% improved flexural modulus by 65%. Similarly, 2.0 wt% MCC improved tensile strength, modulus, and flexural modulus by 11%, 11%, and 46%, respectively, and a 26% increase in flexural strength at 1.0 …