Materials Science and Engineering Commons^™

The Effects Of Starting Microstructure On The Results Of Double Intercritical Annealing Process Of 0.107%C-2.39%Mn-0.453%Si Dual Phase Steel, Wichayut Chumoung, Nithi Saenarjhan

Journal of Metals, Materials and Minerals

This study investigates and compares the effects of the starting microstructure on the double intercritical annealing (DIA) process on the microstructure and mechanical properties of 0.11%C-2.39%Mn-0.45%Si dual phase steel. The specimens were austenitized, followed by water quenching (WQ) or air cooling (AC), then DIA at 730°C. For the WQ method, high cooling rate results in the formation of a high strength martensitic structure. Conversely, AC method yields a moderate cooling rate, forming a bainitic structure. After single intercritical annealing (SIA), the microstructure transformed into ferrite and martensite. WQ method specimens contain high stress concentration, leading to earlier recrystallization compared to …

Effects Of Thickness On The Performance Of Sno2 Gas Sensors Using Low-Temperature Co-Fired Ceramic, Montri Aiempanakit, Kittiyaporn Singsumphan, Chutima Nakmuk, Cheewita Suwanchawalit, Manatsawee Srirak, Kata Jaruwongrungsee, Anurat Wisitsoraat, Monrudee Liangruksa, Chawarat Siriwong

Journal of Metals, Materials and Minerals

This study develops SnO2-based gas sensors integrated with a low-temperature co-fired ceramic (LTCC) micro hotplate for ethanol detection. SnO2 nanoparticles were synthesized using a simple precipitation method, and sensing layers with varying thicknesses around 0.24 µm, 0.71 µm, and 1.20 µm were applied to evaluate their influence on performance. The results show that the optimal configuration is a 0.71 µm layer, offering high sensitivity, fast response, and efficient recovery. Operating at a low voltage of 3.2 V, the sensors exhibit low power consumption, suitable for portable and battery-operated applications. The gas-sensing mechanism relies on changes in resistance due to interactions …

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 …

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 …

Atmospheric Corrosion Of Hot Dip Galvanized Structural Steel Exposed To The Tropical Climate Of Thailand, Adithep Bunphot, Pakawat Sancharoen, Somnuk Tangtermsirikul, Taweep Chaisomphob

Journal of Metals, Materials and Minerals

Hot dip galvanized steels were tested in the atmospheric tropical climate environments of Thailand for 12 month from March 2021 to March 2022. Three locations were studied, i.e. a rural area at Saraburi in the central part, an industrial area at Chonburi in the eastern part, and a coastal/urban area at Songkhla in the southern part of Thailand. The thickness loss of the galvanized steel samples was measured by the weight loss method. Types of corrosion products observed on the samples were zincite, wulfingite, hydrozincite, and simonkolleite. All of them were found on the sample at Songkhla. Three of them, …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

Lactic Acid-Assisted Complexation For Enhanced Lithium Extraction And Its Application To Spent Libs, Sibananda Sahu, Niharbala Devi

Journal of Metals, Materials and Minerals

A novel approach for complexing lithium with lactic acid to enhance extraction efficiency and its application to spent LIBs was proposed in this study. Key parameters influencing the extraction were systematically examined, including lactic acid concentration, pH of the aqueous phase, concentration of extractant, diluent selection, phase ratio between organic and aqueous phase, and stripping efficiency. Lithium extraction showed a remarkable improvement, rising from 16% to 43%, as the lactic acid concentration enhanced from 0.01 mol∙L‒1 to 1.0 mol∙L‒1. This was achieved using D2EHPA (0.1 mol∙L‒1)  at a maintained pH of 6.5. Maximum lithium extraction of 84.5% was observed at …

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 …

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 …

Development Of Ceramic Based Novel Materials For Application In Low Temperature Solid Oxide Fuel Cell (Ltsofc) – A Critical Review, Kaliappan Tamilselvan, Arputharaj Samson Nesaraj

Journal of Metals, Materials and Minerals

In the field of renewable energy, fuel cell research has emerged as a promising source of energy for the future. Fuel cells utilize fuels more efficiently compared to other energy generation systems. Solid oxide fuel cell (SOFC) systems are gaining prominence due to their applications in military operations, mobile power supplies, and stationary power generation. Significant research efforts are being made to lower the operating temperature of SOFCs from 1000℃ to approximately 600℃, leading to the development of low-temperature solid oxide fuel cells (LTSOFCs). This is being achieved by selecting alternative electrode and electrolyte materials, particularly ceramics, to enhance their …

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 …

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. …

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 …

The Effect Of Asphalt Emulsion On The Properties Of Fly Ash Based Geopolymers, Natcha Prommityat, Chiravoot Pechyen, Pitak Laoratanakul, Benya Cherdhirunkorn

Journal of Metals, Materials and Minerals

This research aimed to study the effect of asphalt emulsion (AE) on the properties of fly ash based geopolymers. Solid waste materials used for the production of geopolymer were coal fly ash (FA) 70 wt% and bagasse ash (BA) 30 wt%. Alkaline solution used for the geopolymerization reaction was the mixture of 10 M NaOH and Na2Sio3

with the ratio of 1:2. The liquid and solid (L/S) ratios of 0.6, 0.7 and 0.8 were prepared. The AE of 1 wt%, 3 wt% and 5 wt% were added into the raw materials mixtures. Then, the mixed slurry was casted into a …

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 …

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. …

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 …

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

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 …

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 …

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 …

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 …

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 …