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Articles 3841 - 3870 of 27383

Full-Text Articles in Engineering

Optimal Design Of An Off-Grid Hybrid Renewable Systems With Battery Storage For Rural Electrification Of Academic Community In Ibogun Campus, Nigeria, Ayodeji Akinsoji Okubanjo, Alexander Okandeji, Ignatius Kema Okakwu, Benjamin Akinloye, Abisola Olayiwola Jan 2025

Optimal Design Of An Off-Grid Hybrid Renewable Systems With Battery Storage For Rural Electrification Of Academic Community In Ibogun Campus, Nigeria, Ayodeji Akinsoji Okubanjo, Alexander Okandeji, Ignatius Kema Okakwu, Benjamin Akinloye, Abisola Olayiwola

Mansoura Engineering Journal

In an era where the debate on climate action has evolved from mere awareness to urgent implementation, energy-efficient management strategies are crucial. The energy mix, combined with optimal design of hybrid renewable energy systems, is a potential option to limit the increase in demand for fossil fuels and the climate issue. As a result, this study proposes an optimal design of hybrid renewable systems using technoeconomic criteria to meet load demand in the Department of Electrical and Electronics Engineering at Olabisi Onabanjo University. The model combines an off-grid energy alternative with a battery storage system. The primary goal is to …

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Mathematical Modeling For Pile Yarn Length And Crimp Ratio In Woven Terry Fabric, Elham E. Elemam, Hamdy A.A. Ebraheem, Ahmed S. Eldeeb, Rehab Abd Elkhalek Jan 2025

Mathematical Modeling For Pile Yarn Length And Crimp Ratio In Woven Terry Fabric, Elham E. Elemam, Hamdy A.A. Ebraheem, Ahmed S. Eldeeb, Rehab Abd Elkhalek

Mansoura Engineering Journal

In this research, a mathematical model for predicting the consumed length and crimp ratio of pile warp yarns in woven terry towel fabrics was developed. The mathematical formulas interrelate the construction parameters of the woven terry fabric such as weave structure, weft count, weft density, counts of pile and ground warp yarns and loop length with the consumed length and crimp ratio of pile warp yarns. Experimental verification was conducted on nine terry cotton fabric samples produced with three different levels of weft density, weft count and loop length. Results showed that theoretical values highly corresponded to the measured values …

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Optimum Design Of Three-Phase Wound Rotor Induction Machine Using Giant Trevally Optimizer Technique, D. El-Hassanein, Abd Al Rahman Amin, Eid Gouda, Mohamed F. Kotb Jan 2025

Optimum Design Of Three-Phase Wound Rotor Induction Machine Using Giant Trevally Optimizer Technique, D. El-Hassanein, Abd Al Rahman Amin, Eid Gouda, Mohamed F. Kotb

Mansoura Engineering Journal

Conventional sizing methods for electric machines often result in large dimensions, excessive weight, even when following correct design principles. In this paper promising Giant Trevally Optimizer “GTO” is employed as a swarm intelligence-based optimization algorithm inspired by the social behavior of giant trevally, to design a three-phase wound rotor induction machine “3WRIM”. The optimization process targets four key objectives: maximizing efficiency , and minimizing weight per kilowatt “ ”, temperature rise , and the no-load current to phase current ratio . These objectives are optimized both simultaneously and individually while adhering to a set of practical design constraints. To validate …

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Shear Strengthening Of Reinforced Concrete Beams Using Pre-Fabricated Ultra-High Performance Fiber Reinforced Concrete (Uhpfrc) Laminates: Experimental Investigation, Mostafa Khairy Elkady, Khalid Mohamed El-Sayed, Marwa Ibrahim Badawi, Gamal Ismaail Khaleel Jan 2025

Shear Strengthening Of Reinforced Concrete Beams Using Pre-Fabricated Ultra-High Performance Fiber Reinforced Concrete (Uhpfrc) Laminates: Experimental Investigation, Mostafa Khairy Elkady, Khalid Mohamed El-Sayed, Marwa Ibrahim Badawi, Gamal Ismaail Khaleel

Mansoura Engineering Journal

This study examines the effectiveness of prefabricated ultra-high-performance fiberreinforced concrete (UHPFRC) laminates in shear strengthening reinforced concrete (RC) beams. A total of nine reinforced concrete beams were cast and tested under a four-point loading till failure. The following key parameters were investigated: the number of strengthening sides, the thickness of the UHPFRC layer, the reinforcement of the strengthening layer (by using two different types of steel mesh, and also, in case of no-steel mesh), the volume fraction of steel fibers, and bonding schemes steel dowels and / or epoxy. The ultimate load and ductility of the strengthened beams have increased …

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Non-Line-Of-Sight Classification In Urban Areas Based On Machine Learning Algorithms, Mohamed Ali Ezzelarab, Mohamed Abdelazim Mohamed, Eman Abdelhalim, Ashraf Abosekeen Jan 2025

Non-Line-Of-Sight Classification In Urban Areas Based On Machine Learning Algorithms, Mohamed Ali Ezzelarab, Mohamed Abdelazim Mohamed, Eman Abdelhalim, Ashraf Abosekeen

Mansoura Engineering Journal

Non-Line-Of-Sight (NLOS) and multipath errors are significant causes of poor accuracy in Global Navigation Satellite Systems (GNSS). These errors occur when satellite signals are diffracted or reflected by obstacles instead of traveling directly along the Line-Of-Sight (LOS), particularly in urban environments. Such diffracted or reflected signals can reach GNSS receivers, skewing pseudorange measurements and posing challenges to accurate GNSS positioning. This study introduces an innovative approach using supervised Machine Learning (ML) models to detect and mitigate NLOS error. To develop and validate these models, GNSS data collected during the smartLoc project from Frankfurt and Berlin in Germany were leveraged, representing …

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Strengthening Of R.C. Beams Subjected To Shear And Torsion Using Externally Bonded Cfrp Sheets, Hazem Elbakry, El-Tony Mahmoud El-Tony, Momen M. Ali Jan 2025

Strengthening Of R.C. Beams Subjected To Shear And Torsion Using Externally Bonded Cfrp Sheets, Hazem Elbakry, El-Tony Mahmoud El-Tony, Momen M. Ali

Mansoura Engineering Journal

The primary objective of this study was to examine the behavior of reinforced concrete beams subjected to shear and torsion and strengthened with external CFRP sheets. To achieve this, seven reinforced concrete beams with identical cross section dimensions (300 mm × 200 mm), shear span (530 mm) were fabricated and tested under combined shear and torsion. Similar flexural and shear reinforcements were used for all specimens. The experimental program included one control specimen, without CFRP sheets, and six strengthened specimens utilizing different strengthening configurations of CFRP sheets. The key variables in the study were the strengthening configuration and the width …

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Monitoring And Analysing Billboards On The Ring Road In Cairo To Promote Energy Saving Behaviour, Sherif Elsayed Elsaid Mohamed Jan 2025

Monitoring And Analysing Billboards On The Ring Road In Cairo To Promote Energy Saving Behaviour, Sherif Elsayed Elsaid Mohamed

Mansoura Engineering Journal

Billboards in Egypt are one of the means of outdoor advertising widely used on highways for commercial or governmental purposes, and their spread has been observed on the ring road in an unsystematic manner, in addition to the use of very many lighting units in all areas. These billboards result in the consumption of large amounts of electricity, in addition to the non-compliance of some of the commercial institutions that own these billboards with the security and safety requirements for the places where the billboard is installed, as well as the methods of construction and installation, in addition to the …

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Evaluating The Efficiency Of "Axial Roads"As A Tool For Increasing Connectivity In Mega Cities, A Case Study In Egypt – "Cairo New Axial Roads", Doaa Abd El Latif Mohammed, Marwa Mohamed Abbas, Nehal M. Elmahdy Jan 2025

Evaluating The Efficiency Of "Axial Roads"As A Tool For Increasing Connectivity In Mega Cities, A Case Study In Egypt – "Cairo New Axial Roads", Doaa Abd El Latif Mohammed, Marwa Mohamed Abbas, Nehal M. Elmahdy

Mansoura Engineering Journal

Mega cities always suffer from many problems concerning connectivity. Hence this research is trying to understand how axial roads can contribute in solving these problems. This Research aims at evaluating the efficiency of axial roads as a tool for increasing connectivity in mega cities in terms of three items ( Distance - Time- Traffic Congestion) This Research handles the topic in terms of three themes. First Theme Handles the axial roads, second theme handles Connectivity in cities, While third theme handles the analytical part by comparing between moving from one destination to another using the axial roads one time and …

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Durability Of Precast Prestressed Concrete Pile In Exposure Severe Environment, Nantawat Khomwan, Pinai Mungsantisuk Jan 2025

Durability Of Precast Prestressed Concrete Pile In Exposure Severe Environment, Nantawat Khomwan, Pinai Mungsantisuk

Journal of Metals, Materials and Minerals

This research project focuses on studying the corrosion resistance of precast prestressed concrete (PC) piles under severe conditions. All PC and non-PC samples were cast using Portland cement type III. The samples included 1 m and 6 m length specimens. To evaluate the effectiveness of corrosion prevention, Sacrificial Anode Cathodic Protection (SACP) was installed in the specimens. Various durability properties of concrete were tested, including chloride permeability, concrete resistivity, and half-cell potential. For short-term effects, an electrical accelerated condition was conducted for the 1 m specimens, which were submerged in a 5% sodium chloride solution by weight. Experimental studies were …

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Investigation Of Photocathodic Corrosion Protection Of Zno/Zns Thin Film For Aisi 304 Stainless Steel In 3.5 Wt% Nacl Solution, Soravid Veerapong, Naw Blessing Oo, Boossayamas Dachbumroong, Parichart Chaum, Thanate Na Wichean, Oratai Jongprateep, Naray Pewnim, Gasidit Panomsuwan, Ratchatee Techapiesancharoenkij Jan 2025

Investigation Of Photocathodic Corrosion Protection Of Zno/Zns Thin Film For Aisi 304 Stainless Steel In 3.5 Wt% Nacl Solution, Soravid Veerapong, Naw Blessing Oo, Boossayamas Dachbumroong, Parichart Chaum, Thanate Na Wichean, Oratai Jongprateep, Naray Pewnim, Gasidit Panomsuwan, Ratchatee Techapiesancharoenkij

Journal of Metals, Materials and Minerals

Photocathodic protection is an alternative cathodic protection technique to protect metals by photo-generated electrons from a coupled semiconductor film under solar light. In this report, ZnO nanorods and heterostructure ZnO/ZnS nanorod films  on FTO substrates were studied for their photocathodic protection for 304 stainless steels (304 SS) in a 3.5 wt% NaCl solution.  The ZnO and ZnO/ZnS nanorods were fabricated on FTO substrates by spray pyrolysis and hydrothermal processes. The photocathodic performances of the ZnO and ZnO/ZnS photoanodes coupled with 304 SS samples were examined by Open-Circuit Potential (OCP), polarization curve analysis, and electrochemical impedance spectra (EIS). The ZnO/ZnS photoanodes …

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Investigation Into Parameters Affecting The Synthesis Of Hybrid Gold Nanoparticle/ Nitrogen-Doped Carbon Dot Colloids, Thammika Srisaman, Anyarat Watthanaphanit Jan 2025

Investigation Into Parameters Affecting The Synthesis Of Hybrid Gold Nanoparticle/ Nitrogen-Doped Carbon Dot Colloids, Thammika Srisaman, Anyarat Watthanaphanit

Journal of Metals, Materials and Minerals

This study reports a two-step synthesis method for producing hybrid nanoparticles composed of gold nanoparticles (AuNPs) and nitrogen-doped carbon dots (CDs). Initially, we employed hydrothermal synthesis to fabricate CDs derived from mangosteen peel extract, which exhibits green light emission. Subsequently, the hybrid AuNPs/CDs were synthesized by inducing plasma in a solution containing CDs and a gold precursor, namely gold(III) chloride trihydrate. Our primary aim was to investigate the key parameters influencing the synthesis process. We assessed the colloidal properties of the AuNPs/ CDs by introducing a stabilizer, specifically sodium alginate, and examined how factors such as the presence of sodium …

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Arginine-Modified Surface Coffee Grounds Activated Carbon For Pb2+ Adsorption: Kinetic, Isotherm And Thermodynamic Studies, Jarawee Chupirom, Sirikorn Khaophong, Nopporn Hemyakorn, Sonchai Intachai, Panita Kongsune Jan 2025

Arginine-Modified Surface Coffee Grounds Activated Carbon For Pb2+ Adsorption: Kinetic, Isotherm And Thermodynamic Studies, Jarawee Chupirom, Sirikorn Khaophong, Nopporn Hemyakorn, Sonchai Intachai, Panita Kongsune

Journal of Metals, Materials and Minerals

This research focuses on enhancing the value of coffee waste by converting it into activated carbon for removing Pb²⁺ ions from contaminated water. Coffee grounds were activated with KOH and carbonized at 600°C for 4 h to produce activated carbon (CGAC), then modified with arginine via hydrothermal treatment at 120°C for 48 h to create Arg-CGAC. The adsorbents' chemical and physical properties were analyzed using SEM, FT-IR, BET, and pHpzc methods. Batch experiments revealed that Arg-CGAC exhibited superior Pb2+ adsorption (223.10 mg∙g‒1) compared to CGAC (119.23 mg∙g‒1) under optimal conditions. Isotherm analysis showed stronger adsorbate-adsorbent interactions and a more endothermic …

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Enhancement Of Cell Viability Of The (Ba,Ca)(Zr,Ti)O And Hydroxyapatite Composites For Bone-Repair Applications, Jirapa Tangsritrakul, Manita Boonchoo, Piyanan Boonphayak, Paweena Uppanan, Pakkanun Kaewkong Jan 2025

Enhancement Of Cell Viability Of The (Ba,Ca)(Zr,Ti)O And Hydroxyapatite Composites For Bone-Repair Applications, Jirapa Tangsritrakul, Manita Boonchoo, Piyanan Boonphayak, Paweena Uppanan, Pakkanun Kaewkong

Journal of Metals, Materials and Minerals

In this work, the influence of hydroxyapatite (HA) addition to the calcium/zirconium-doped barium titanate (BCZT) piezoceramic was investigated to evaluate its potential for bone-repair applications. The relationship between the physical, electrical, and biological properties of the (100-x)BCZT-(x)HA composite was observed via various techniques. The HA powder was synthesized via precipitation method, whereas the BCZT powder was produced by solid-state reaction to prepare the (100-x)BCZT-(x)HA composites, where x = 0 wt% to 50 wt%. The results showed that the dielectric, ferroelectric, and piezoelectric properties of the (100-x)BCZT-(x)HA composites decreased dramatically as introducing HA into BCZT due to the occurrence of secondary …

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Structural And Dynamic Analysis Of Tapered Mast Bladeless Wind Turbines Using Fea And Cfd For Renewable Energy Generation, A. Pradeep, Raman Kumar, P. S. Satheesh Kumar, Nagaraj Patil, Vijayakumar Sivasundar, P. Vijaya Kumar, Selvaraj Manickam, Debasish Shit Jan 2025

Structural And Dynamic Analysis Of Tapered Mast Bladeless Wind Turbines Using Fea And Cfd For Renewable Energy Generation, A. Pradeep, Raman Kumar, P. S. Satheesh Kumar, Nagaraj Patil, Vijayakumar Sivasundar, P. Vijaya Kumar, Selvaraj Manickam, Debasish Shit

Journal of Metals, Materials and Minerals

The present analysis investigates the possibility of using a tapered mast profile for bladeless wind turbines (BWTs) to enhance the function of extracting wind energy through the phenomenon of vortex-induced vibrations. Conventional HAWTs which remain the most efficient are however, costly in maintenance, mechanically complicated and rather unfavourable to the environment. To overcome these challenges a prototype BWT with a 0.6 m tapered mast was developed for the currents using mild steel and hollow square steel sections. Wind tunnels were also used to compare stress distribution, structural deformation and vane vortex shedding for the building at different wind speeds. The …

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Analyse The Mechanical Property Optimization For Fdm/3d-Printed Polycarbonate Using Taguchi And Topsis Techniques, N. Srinivasa Rao, Raman Kumar, N. Kavitha, Ramachandran T., Hari Prasadarao Pydi, Aman Shankhyan, Ram Subbiah, Vikasdeep Singh Mann Jan 2025

Analyse The Mechanical Property Optimization For Fdm/3d-Printed Polycarbonate Using Taguchi And Topsis Techniques, N. Srinivasa Rao, Raman Kumar, N. Kavitha, Ramachandran T., Hari Prasadarao Pydi, Aman Shankhyan, Ram Subbiah, Vikasdeep Singh Mann

Journal of Metals, Materials and Minerals

Fused Deposition Modeling is 3D printing techniques which chiefly appreciated for prototypes. This manufacturing process works by extrusion of thermoplastic materials to make the three-dimensional objects. In this work, we pursued to identify the FDM parameters to increase mechanical properties, specifically ultimate tensile strength (UTS) and compressive strength (CMS). Polycarbonate was chosen to create the test samples because of the best thermal and mechanical properties, which was the increasing manufacturing applications of 3D printing. Nine experiments were conducted to verify the interaction of the considered parameters, namely infill rate (IR), printing speed (PS), and film height (FH). The combined use …

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Low-Cost High Performance Sustainable Triboelectric Nanogenerator Based On Laboratory Waste, Archana Panda, Kunal Kumar Das, Kushal Ruthvik Kaja, Venkataramana Gandi, Sunit Gourav Mohanty, Basanta Kumar Panigrahi Jan 2025

Low-Cost High Performance Sustainable Triboelectric Nanogenerator Based On Laboratory Waste, Archana Panda, Kunal Kumar Das, Kushal Ruthvik Kaja, Venkataramana Gandi, Sunit Gourav Mohanty, Basanta Kumar Panigrahi

Journal of Metals, Materials and Minerals

The production of waste materials in laboratories is an unavoidable consequence of diverse experiments and activities. These materials can range from chemicals, solvents, and biological samples to electronic components, glassware, and plastics. Typically, this waste is classified into hazardous and non-hazardous categories, requiring careful disposal to avoid environmental and health risks. These can be repurposed for energy harvesting methods, such as using polymers in triboelectric nanogenerators (TENGs) or recycling metallic waste for electrodes. This approach reduces waste while advancing sustainable energy solutions. This technique demonstrates remarkable efficiency in utilizing diverse waste materials to transform various forms of mechanical energy into …

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Efficacy Of Bifeo3 And Bi4ti3o12 Towards Photocatalytic Degradation Of Mg And Mb Dyes: A Comparative Study Under Solar Irradiation, Rasmirekha -, Rishabh Kamal, Debapriya -, Suresh Kumar Dash Jan 2025

Efficacy Of Bifeo3 And Bi4ti3o12 Towards Photocatalytic Degradation Of Mg And Mb Dyes: A Comparative Study Under Solar Irradiation, Rasmirekha -, Rishabh Kamal, Debapriya -, Suresh Kumar Dash

Journal of Metals, Materials and Minerals

Bismuth-based perovskite material has been used as promising photocatalysts for photo catalytic degradation of toxic dyes with tailored crystallites and fine-tuned band gap for superior activity. BiFeO3 and Bi4Ti3O12 were synthesized by a simple sol-gel method and their crystal structure, morphology, and optical property were characterized by XRD, SEM, TEM, FTIR, EDS and UV–DRS. The XRD pattern exhibits the formation of rhombohedral and orthorhombic phase of bismuth ferrite and bismuth titanate. The study confirms the formation of non-uniform BiFeO3 and Bi4Ti3O12 nanoparticles with uniform particle distribution, with band gap energy (Eg) of 2.2 eV and 2.9 eV, respectively, from UV-DRS …

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Synergistic Effects Of Ti3c2tx Mxene On The Structural And Dielectric Properties Of Blend-Based Dielectrics, Nitesh Kumar Nath, Rajanikanta Parida, Bichitra Nanda Parida, Nimai C. Nayak Jan 2025

Synergistic Effects Of Ti3c2tx Mxene On The Structural And Dielectric Properties Of Blend-Based Dielectrics, Nitesh Kumar Nath, Rajanikanta Parida, Bichitra Nanda Parida, Nimai C. Nayak

Journal of Metals, Materials and Minerals

The PVDF/PMMA-Ti₃C₂Tx MXene composite (PMC) films are processed via the solution casting method. The various phases (α, β) of PVDF have been identified through analysis using an X-ray diffractometer and Fourier transform infrared spectroscopy instruments. The maximum percentage β phase (%) obtained was 73.15%, which corresponds to a 10.0 wt% composite film. The structural analysis revealed that the Ti3C2Tx nanoparticles are immiscibly distributed throughout the blend matrix, allowing the electrical conductivity and dielectric constant values to noticeably increase at constant frequency. The highest dielectric loss of 0.077 and the highest dielectric constant (εr) of 191.5 …

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The Effect Of Fe-Nimnmo High Entropy Alloy Electrode On Enhancing The Weldability And Mechanical Properties Of Railway Steel 900a, Sarawut Chaowakarnkool, Kanokwan Uttarasak, Sittipong Jaipayuk, Narin Jantaping, Man Tuiprae Jan 2025

The Effect Of Fe-Nimnmo High Entropy Alloy Electrode On Enhancing The Weldability And Mechanical Properties Of Railway Steel 900a, Sarawut Chaowakarnkool, Kanokwan Uttarasak, Sittipong Jaipayuk, Narin Jantaping, Man Tuiprae

Journal of Metals, Materials and Minerals

The rail transport system is essential for moving passengers and heavy goods over long distances, with steel 900A being a common material used for rail tracks in Thailand. Prolonged exposure to heavy loads and variable environmental conditions can lead to rail track damage known as "engine burn”, which results from friction between the train’s wheels and the rail. The flux-cored arc welding (FCAW) process is employed to repair these burns due to its use of readily available electrode wires and the efficiency of the repair. However, welding high-carbon steel like rail steel 900A poses challenges, such as a tendency to …

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Review On Surface Engineering Of Nmc For High Performance Of Lithium-Ion Batteries, Pongsakorn Kantichaimongkol, Thanyalux Wanotayan, Jiaqian Qin Jan 2025

Review On Surface Engineering Of Nmc For High Performance Of Lithium-Ion Batteries, Pongsakorn Kantichaimongkol, Thanyalux Wanotayan, Jiaqian Qin

Journal of Metals, Materials and Minerals

The lithium-ion battery stands as a highly promising energy storage system. Among its key components, the cathode material—particularly lithium nickel manganese cobalt oxide (LiNiMnCoO₂), or NMC—is of great importance due to its high specific capacity and cost-effectiveness. Despite its advantages, NMC faces certain challenges, with limited cycle performance being one of the most critical issues. To address this issue, extensive research has been dedicated to surface modification strategies for NMC materials. Studies have identified two primary approaches, doping and coating, both of which have proven effective in enhancing the material's long-term stability. This work systematically examines, categorizes, and compares recent …

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The Influence Of Aluminium Dross Residue And Coal Fly Ash On The Properties Of Geopolymers, Haswanee Phungpha, Pitak Laoratanakul, Benya Cherdhirunkorn Jan 2025

The Influence Of Aluminium Dross Residue And Coal Fly Ash On The Properties Of Geopolymers, Haswanee Phungpha, Pitak Laoratanakul, Benya Cherdhirunkorn

Journal of Metals, Materials and Minerals

In this research, aluminium dross residue (AD) and coal fly ash (FA) were used for the production of geopolymers. The illegal dumping of AD and the high cost for AD waste disposal have been problems for long time in Thailand. Therefore, the feasibility of using AD (0 wt% to 100 wt%) in the geopolymer production had been carried out to find the alternative way to resolve these problems. The alkaline solution of NaOH 7 M and Na2SiO3 with the ratio of 1:3 was used for the geopolymerization reaction. It was found that the addition of AD caused the ammonia gas …

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Tin Oxide Nanoparticle Extraction From Waste Solder Dross Via Low-Temperature Hydrometallurgical Process, Tanongsak Yingnakorn, Sirunya Somla, Thanapon Chandakhiaw, Ethan Cheung, Sakhob Khumkoa Jan 2025

Tin Oxide Nanoparticle Extraction From Waste Solder Dross Via Low-Temperature Hydrometallurgical Process, Tanongsak Yingnakorn, Sirunya Somla, Thanapon Chandakhiaw, Ethan Cheung, Sakhob Khumkoa

Journal of Metals, Materials and Minerals

This study proposes a hydrometallurgical approach to valorising industrial waste by producing SnO2 nanoparticles (NPs) from waste solder dross obtained by skimming off of tin solder baths from electronic dipping processes. The process involves leaching the dross with aqueous hydrochloric acid solution and hydrogen peroxide, followed by precipitation with ammonium hydroxide and purification with aqueous nitric acid solution. The optimised leaching conditions were determined to be 4 mol∙ L‒1 HCl, 11% v/v H2O2, 25℃, and a leaching time of 15 min. SnO2 NPs were successfully precipitated at pH 4 using 25% v/v NH4OH and purified with 1 mol∙ L‒1 HNO3. …

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Investigation Of Pressure And Temperature Distributions In Aerofoils Using Cfd Simulation, Ramesh Krishnan L., Jasgurpreet Singh Chohan, S. Vijayakumar, N. Beemkumar, Sriram Desikan, V. Nagabhushana Rao, M.Naga Swapna Sri, Mayank Kundlas Jan 2025

Investigation Of Pressure And Temperature Distributions In Aerofoils Using Cfd Simulation, Ramesh Krishnan L., Jasgurpreet Singh Chohan, S. Vijayakumar, N. Beemkumar, Sriram Desikan, V. Nagabhushana Rao, M.Naga Swapna Sri, Mayank Kundlas

Journal of Metals, Materials and Minerals

Most aircraft derive the design of their wings, fins, and horizontal stabilizers from this construction approach, incorporating curved surfaces to enhance the lift-to-drag ratio during flight. Over the past decade, Computational Fluid Dynamics (CFD) has become the leading tool for designing components and processes involving fluid or gas movement across industries such as aviation, automotive, and manufacturing. This study examines the aerodynamic characteristics—including pressure, density, and temperature distribution, as well as lift and drag forces—of two different angles of attack based on the M13 and Eppler 1233 airfoils. The analysis considers an airfoil with varying chord thickness while maintaining a …

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Photocatalytic Behaviour Of (Biybo3)0.5-(Batio3)0.5, Yasaswi Priyadarshini Samal, Subhalaxmi Patra, Tapan Das, Minakshi Padhy Jan 2025

Photocatalytic Behaviour Of (Biybo3)0.5-(Batio3)0.5, Yasaswi Priyadarshini Samal, Subhalaxmi Patra, Tapan Das, Minakshi Padhy

Journal of Metals, Materials and Minerals

Different organic compounds like dyes and pharmaceutical contaminants pollute a large amount of water which can increase the chemical oxygen demand in water bodies. The photodegradation of dyes has been widely studied using TiO2-based nanomaterials, which are typical photocatalysts. TiO2 is highly effective in reducing pollutants when exposed to UV light and does not cause secondary pollution. However, TiO2 is only functional when exposed to UV light, which is not ideal for real-world use. This drawback of TiO2 pulls the research towards modified photocatalysts for better yield. In this study, the (BiYbO3)0.5 - (BaTiO3)0.5 material was formulated by solid state …

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Synergistic Effects Of Co-Ni Nanoalloys On Sio2@Tio2: A Novel Approach To Photocatalytic Tetracycline Degradation, Pratyush Kumar Sahu, Alaka Rath, Aslisha Champati, Ashish Madual, Pravat Manjari Mishra, Abanti Pradhan, Brundabana Naik Jan 2025

Synergistic Effects Of Co-Ni Nanoalloys On Sio2@Tio2: A Novel Approach To Photocatalytic Tetracycline Degradation, Pratyush Kumar Sahu, Alaka Rath, Aslisha Champati, Ashish Madual, Pravat Manjari Mishra, Abanti Pradhan, Brundabana Naik

Journal of Metals, Materials and Minerals

To develop a cost-effective alternative to noble metal catalysts for photocatalysis, we synthesized a series of bimetallic Co-Ni nanoalloys on core-shelled SiO2@TiO2 nanostructures via a chemical reduction approach. The research demonstrates the photocatalytic behaviour of the Co-Ni alloy-enhanced SiO2@TiO2 (ST-Co, Ni) hybrid nanocatalyst, focusing on its crystalline structures, morphological shapes, chemical conditions, and optical properties, utilizing techniques such as X-ray diffraction, field emission scanning electron microscopy, UV-visible diffuse reflectance spectroscopy, photoluminescence spectroscopy, transmission electron microscope, and electrochemical analysis. The catalyst was evaluated for its effectiveness in degrading tetracycline, an overused antibiotic that persists in aquatic environments and is known for …

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Studies Of Structural, Microstructural, Dielectric, And Electrical Characterization Of Binaznmoo6 Double Perovskite, Swati Panda, Supriya Barik, Ritu Purna Sahu, Adwit Prasad Sahu, S. Mishra, S. K. Parida Jan 2025

Studies Of Structural, Microstructural, Dielectric, And Electrical Characterization Of Binaznmoo6 Double Perovskite, Swati Panda, Supriya Barik, Ritu Purna Sahu, Adwit Prasad Sahu, S. Mishra, S. K. Parida

Journal of Metals, Materials and Minerals

This study investigates the structural, microstructural, dielectric, and electrical properties of BiNaZnMoO₆ (BNZM) ceramic synthesized using a conventional solid-state reaction method. Preliminary structural analysis using X-ray diffraction (XRD) suggests orthorhombic crystal symmetry. Scanning electron microscopy (SEM) micrographs reveal a uniform distribution of well-grown grains with well-defined grain boundaries, which may contribute to the enhanced dielectric properties. Energy dispersive X-ray spectroscopy (EDX) analysis confirms the presence of all constituent elements Bi, Na, Zn, Mo, and O in the studied sample. Dielectric spectra analysis as a function of frequency and temperature indicates the formation of high-quality dielectric materials, evidenced by a high …

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Graphitic Carbon Nitride Loaded Bi4o5i2 For Elevated Photocatalytic Tetracycline Degradation, Subhasish Mishra, Barsha Marandi, Kali Sanjay, Rashmi Acharya Jan 2025

Graphitic Carbon Nitride Loaded Bi4o5i2 For Elevated Photocatalytic Tetracycline Degradation, Subhasish Mishra, Barsha Marandi, Kali Sanjay, Rashmi Acharya

Journal of Metals, Materials and Minerals

As a robust photocatalyst, Bi4O5I2 have has attracted significant scientific interest owing to its narrow bandgap energy, escalated electronic properties and high stability. Nonetheless, the unfavourable band structure and higher recombination of excitons have restricted its diversified photocatalytic applications. In this context, binary heterojunction construction using Bi4O5I2 could be considered an effective strategy for spatial charge carrier separation across the hetero-interface, leading to an enhanced activity. In this study, we have prepared Bi4O5I2/g-C3N4 Z-scheme hetero-structures via a wet impregnation strategy that preserves the spherical structure of Bi4O5I2. The phase purity, chemical bonding, morphology and microstructure of the composite were confirmed …

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Oxidation Of Sn-1 Wt.% Bi In Air And In Oxygen Deprived Environment, Pakawat Polmanee, Benjie Fernandez, Patama Visuttipitukul, Ittipon Cheowanish, Tachai Luangvaranunt Jan 2025

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.

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Solar Radiation Assisted Photocatalytic Degradation Of Congo Red Using Ce Doped Lacoo3, Rishabh Kamal, Rasmirekha Pattanaik, Debapriya Pradhan, Suresh Kumar Dash Jan 2025

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 …

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Optimization And Characterization Of Carrageenan/Alginate Ratio And Seaweed Waste To Develop Composite Bioplastics From Kappaphycus Alvarezii, Ali Ridlo, Retno Hartati, Agus Sabdono Jan 2025

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, …

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